Table of contents

 

Index to observations received from ARPS members

 

Observations received FROM ARPS MEMBERS

 

August/September 2008

 

Astrometry

 

Peter Birtwhistle

 

Peter comments; The weather was very poor at Great Shefford in July and August. With 25 hours at the telescope, July provided less than half the observing hours logged for that month in any of the last three years. August was officially the cloudiest August in the UK since records began in 1929 and provided only about 50 (generally poor quality) hours, again well below totals from recent years.

 

However, the night of August 3/4th provided the opportunity to recover three NEOs not seen since their discovery apparitions and a somewhat unusual confirmation of a NEO Confirmation Page (NEOCP) object.

 

Aten 2004 SB56 had sped northwards after conjunction with the Sun in July and in the 10 days before recovery had brightened 3 magnitudes and increased elongation from 35 to 72°. With an uncertainty area on the sky of 14' it was picked up only 3' from prediction at mag +16.7 and about 6° from the North Pole, a relatively easy recovery.

 

Apollo 2007 RT12 had an uncertainty of about 1° and at mag +20.0 was a potentially difficult object to recover, just 1° east of Alpha Cep, deep in the Milky Way. Fortunately it was only 8' from prediction and not involved with any field stars during the time it was imaged. With an absolute magnitude of +23.9, equating to an estimated diameter of 30-95 meters, there have only been 10 other NEOs recovered at a second opposition that are smaller than 2007 RT12. Included in this set are the Earth co-orbital companion 2002 AA29 and the tiny 2006 RH120 that was temporarily captured in Earth orbit during 2006 & 2007. My thanks to Sergio Foglia for providing a list of small NEOs seen at more than one apparition.

 

The third object was 2001 QL153, an Amor that had been observed for about 4 months and had not been seen since January 2002. It too had an uncertainty of about 1° and predicted to be mag +20.5 and could have posed a problem to pick up. It was in a less crowded field than 2007 RT12 and after more than six years since last being observed was recovered only 9' from prediction.

 

A LINEAR discovery put on the NEOCP on August 3rd turned out to be something of a puzzle. 2008 PG1 was observed from 9-10am UT on August 3 by LINEAR at mag +19, moving at 9"/min from west to east, in the morning sky about 13° north of Mira Ceti. By 2am on August 4th it was predicted to be accelerating and to have an uncertainty area 1.7° long, extending roughly West to East, in the direction of motion. I eventually confirmed it 43' further west than the most westerly point of the uncertainty area (quite unusual for the MPC prediction to be this far out) and moving at about the same speed as when LINEAR discovered it. The orbit appears to be rather indeterminate but it was announced on MPEC 2008-P14 with just the observations from LINEAR and my set of confirmation positions. The orbital eccentricity had been assumed (done sometimes when the orbit is rather indeterminate, to try and help improve the orbit solution). No other observatories had reported positions for the NEO before I got my next chance to observe the area early on August 9th. By then, using FindOrb software from Bill Gray to generate a large number of 'Monte Carlo' orbits to estimate the likely uncertainty area, it looks like it could have been anywhere in a nearly 3° long band. I didn't manage to locate it that morning nor on my next opportunity 4 days later and it has not been reported from anywhere else since. It is now listed as a Virtual Impactor by JPL with 97 potential impacts, the first in only 5 years time, but with such large uncertainties in its orbital elements the chance of collision then is given as just 1 in 200 million!

 

04209         C2008 08 22.88303 20 47 41.73 -27 15 32.1                      J95 = MBA

04209         C2008 08 22.88964 20 47 41.39 -27 15 30.5          15.7 R      J95

 

04958         C2008 08 15.08119 04 01 11.36 +25 15 57.9                      J95 = MBA

04958         C2008 08 15.08497 04 01 11.59 +25 15 58.6                      J95

04958         C2008 08 15.08872 04 01 11.84 +25 15 58.9          17.3 R      J95

 

05134         C2008 08 22.87840 20 48 38.04 -27 06 29.5                      J95 = MBA

05134         C2008 08 22.88303 20 48 37.82 -27 06 30.5                      J95

05134         C2008 08 22.88964 20 48 37.53 -27 06 32.4          15.9 R      J95

 

17354         C2008 08 04.09013 22 43 04.40 -07 50 34.2                      J95 = MBA

17354         C2008 08 04.10314 22 43 03.91 -07 50 37.7          18.4 R      J95

 

25649         C2008 08 24.88579 21 05 14.23 -04 38 11.7                      J95 = MBA

25649         C2008 08 24.89229 21 05 13.97 -04 38 13.2                      J95

25649         C2008 08 24.90034 21 05 13.63 -04 38 15.4          17.9 R      J95

 

28135         C2008 08 15.08119 04 00 43.87 +25 29 02.0                      J95 = MBA

28135         C2008 08 15.08497 04 00 44.18 +25 29 03.5                      J95

28135         C2008 08 15.08872 04 00 44.47 +25 29 04.8          19.2 R      J95

 

66140         C2008 08 24.88579 21 04 33.50 -04 33 10.9                      J95 = MBA

66140         C2008 08 24.89229 21 04 33.22 -04 33 12.6                      J95

66140         C2008 08 24.90034 21 04 32.89 -04 33 15.1          18.0 R      J95

 

89898         C2008 08 02.99937 22 45 38.85 -07 30 28.9                      J95 = MBA

89898         C2008 08 03.01299 22 45 38.38 -07 30 30.2                      J95

89898         C2008 08 03.03181 22 45 38.03 -07 30 32.4          19.9 R      J95

 

B8242         C2008 08 04.09013 22 43 26.88 -07 49 04.1                      J95 = MBA

B8242         C2008 08 04.10314 22 43 26.32 -07 49 08.1          18.9 R      J95

 

C1921         C2008 08 02.99937 22 45 44.36 -07 23 27.0                      J95 = MBA

C1921         C2008 08 03.03181 22 45 43.38 -07 23 33.4          19.5 R      J95

 

C6303         C2008 08 04.09013 22 42 22.52 -07 48 33.2                      J95 = MBA

C6303         C2008 08 04.10314 22 42 21.93 -07 48 33.1          19.8 R      J95

 

F4441         C2008 08 12.97212 22 18 05.93 -11 03 51.7                      J95 = MBA

F4441         C2008 08 13.00223 22 18 04.38 -11 04 03.6          19.6 R      J95

 

     K00D20Z  C2008 08 02.93553 21 27 59.69 -17 09 01.9                      J95 = MBA

     K00D20Z  C2008 08 02.93942 21 27 59.49 -17 09 01.3                      J95

     K00D20Z  C2008 08 02.94329 21 27 59.27 -17 09 02.8          19.0 R      J95

 

     K01QF3L  C2008 08 04.11299 22 11 36.74 +08 21 20.5                      J95 = Amor = Recovery at 2nd opposition. Found 9' from prediction

     K01QF3L  C2008 08 04.11746 22 11 36.65 +08 21 16.7          20.6 R      J95

     K01QF3L IC2008 08 09.07621 22 10 40.65 +06 57 07.1                      J95

     K01QF3L IC2008 08 09.10060 22 10 40.19 +06 56 38.8          19.4 R      J95

 

     K01SA4E  C2008 08 02.93553 21 27 21.54 -17 13 25.6                      J95 = MBA

     K01SA4E  C2008 08 02.93942 21 27 21.31 -17 13 27.6                      J95

     K01SA4E  C2008 08 02.94329 21 27 21.02 -17 13 26.5          19.3 R      J95

 

     K01W17R  C2008 08 31.93510 22 42 34.69 +04 16 21.6                      J95 = MBA

     K01W17R  C2008 08 31.94079 22 42 34.40 +04 16 19.5                      J95

     K01W17R  C2008 08 31.94597 22 42 34.14 +04 16 17.8          18.7 R      J95

 

     K03SJ5W  C2008 08 31.93510 22 42 41.23 +04 15 17.3                      J95 = MBA

     K03SJ5W  C2008 08 31.94079 22 42 40.97 +04 15 15.8                      J95

     K03SJ5W  C2008 08 31.94597 22 42 40.73 +04 15 14.6          19.3 R      J95

 

     K03SS9E  C2008 08 30.94076 21 58 56.32 -08 36 22.8                      J95 = MBA

     K03SS9E  C2008 08 30.98173 21 58 54.66 -08 36 42.8                      J95

     K03SS9E  C2008 08 30.99701 21 58 54.01 -08 36 50.7          19.4 R      J95

 

     K03T03Q  C2008 08 30.90999 21 44 26.48 -15 37 09.2                      J95 = MBA

     K03T03Q  C2008 08 30.92462 21 44 25.75 -15 37 09.9                      J95

     K03T03Q  C2008 08 30.95940 21 44 23.86 -15 37 13.3          20.1 R      J95

 

     K04B41O  C2008 08 14.03327 04 00 23.44 +48 39 39.5                      J95 = Apollo

     K04B41O  C2008 08 14.12744 04 00 34.52 +48 42 41.4                      J95

 

     K04S56B  C2008 08 03.94986 03 58 13.06 +84 23 52.3                      J95 = Aten = Recovery at 2nd opposition. Found 3' from prediction

     K04S56B  C2008 08 03.95075 03 58 08.64 +84 24 04.1                      J95

     K04S56B  C2008 08 03.95159 03 58 04.70 +84 24 14.5          16.7 R      J95

     K04S56B  C2008 08 04.92020 01 24 30.83 +87 00 16.6                      J95

     K04S56B  C2008 08 04.92316 01 23 44.29 +87 00 32.7                      J95

     K04S56B  C2008 08 04.92422 01 23 27.72 +87 00 38.4                      J95

     K04S56B  C2008 08 04.92545 01 23 08.19 +87 00 45.0                      J95

     K04S56B  C2008 08 04.92659 01 22 50.37 +87 00 51.0          16.9 R      J95

 

     K04V64A bC2008 08 14.11206 07 09 30.40 +46 39 48.7                      J95 = MBA

     K04V64A bC2008 08 14.14592 07 09 19.62 +46 40 31.7          18.5 R      J95

 

     K05W57R  C2008 08 30.94076 21 59 30.59 -08 28 35.7                      J95 = MBA

     K05W57R  C2008 08 30.98173 21 59 28.47 -08 28 53.3                      J95

     K05W57R  C2008 08 30.99701 21 59 27.59 -08 28 59.5          20.3 R      J95

 

     K05XB7B  C2008 08 13.98634 21 20 37.87 -17 15 08.2                      J95 = MBA

     K05XB7B  C2008 08 13.99472 21 20 37.35 -17 15 09.0          20.0 R      J95

 

     K05X03Q  C2008 08 30.94076 21 59 55.54 -08 36 03.6                      J95 = GS88VC = 2008 QE20 = MBA = GS designation, subsequently linked with earlier designated object

     K05X03Q  C2008 08 30.98173 21 59 53.22 -08 36 07.0                      J95

     K05X03Q  C2008 08 30.99701 21 59 52.31 -08 36 08.2          18.6 R      J95

     K05X03Q IC2008 08 31.05836 21 59 48.83 -08 36 12.6          18.3 R      J95

     K05X03Q  C2008 08 31.92021 21 59 02.13 -08 37 15.3                      J95

     K05X03Q  C2008 08 31.92439 21 59 01.93 -08 37 15.8                      J95

     K05X03Q  C2008 08 31.92856 21 59 01.68 -08 37 15.7          18.6 R      J95

 

     K06A93X  C2008 08 12.97212 22 17 26.08 -10 57 14.8                      J95 = MBA

     K06A93X  C2008 08 13.00223 22 17 24.72 -10 57 18.3          20.1 R      J95

 

     K06D81Y  C2008 08 04.09013 22 42 45.20 -07 51 53.9                      J95 = MBA

     K06D81Y  C2008 08 04.10314 22 42 44.71 -07 51 56.4          20.8 R      J95

 

     K07B65J  C2008 08 31.00764 23 27 49.46 -08 02 09.3                      J95 = MBA

     K07B65J IC2008 08 31.01286 23 27 49.19 -08 02 11.9          19.7 R      J95

 

     K07D25K  C2008 08 02.99937 22 45 32.60 -07 26 09.6                      J95 = MBA

     K07D25K  C2008 08 03.01299 22 45 31.99 -07 26 13.7                      J95

     K07D25K  C2008 08 03.03181 22 45 31.23 -07 26 16.1          20.6 R      J95

 

     K07E89F  C2008 08 30.90999 21 44 39.31 -15 34 43.3                      J95 = MBA

     K07E89F  C2008 08 30.92462 21 44 38.57 -15 34 45.8                      J95

     K07E89F  C2008 08 30.95940 21 44 36.84 -15 34 56.6          20.3 R      J95

 

     K07R12T  C2008 08 03.93616 21 26 58.38 +62 36 44.0                      J95 = Apollo = Recovery at 2nd opposition. Found 8' from prediction

     K07R12T  C2008 08 03.93849 21 26 57.76 +62 36 16.7                      J95

     K07R12T  C2008 08 03.94081 21 26 57.15 +62 35 50.3          20.1 R      J95

     K07R12T IC2008 08 07.94478 21 19 03.78 +48 42 37.5                      J95

     K07R12T IC2008 08 07.95988 21 19 01.63 +48 39 27.8                      J95

     K07R12T  C2008 08 12.87538 21 14 14.67 +31 59 07.9                      J95

     K07R12T  C2008 08 12.88420 21 14 14.01 +31 57 29.2                      J95

     K07R12T  C2008 08 12.89675 21 14 13.00 +31 55 08.2                      J95

     K07R12T  C2008 08 12.90759 21 14 12.01 +31 53 06.5          19.7 R      J95

 

     K08O00O bC2008 08 12.93628 20 22 43.45 -17 00 26.8                      J95 = Apollo

     K08O00O bC2008 08 12.94893 20 22 42.29 -17 00 25.6          19.8 R      J95

 

     K08O09C bC2008 08 02.89945 20 54 59.66 -15 55 54.0                      J95 = 8P56DB7 = Apollo

     K08O09C bC2008 08 02.90506 20 54 54.82 -15 54 22.0                      J95

     K08O09C bC2008 08 02.91064 20 54 50.03 -15 52 47.2          18.3 R      J95

 

     K08O10N  C2008 08 01.05987 21 27 49.16 -09 14 19.6                      J95 = BK67081 = Apollo

     K08O10N  C2008 08 01.06275 21 27 50.13 -09 14 40.9                      J95

     K08O10N  C2008 08 01.06823 21 27 52.02 -09 15 21.3          18.4 R      J95

     K08O10N  C2008 08 02.97316 21 41 45.30 -13 37 01.9                      J95

     K08O10N  C2008 08 02.97632 21 41 46.71 -13 37 31.8                      J95

     K08O10N  C2008 08 02.97948 21 41 48.10 -13 38 01.1          18.6 R      J95

 

     K08O13N  C2008 08 02.99937 22 46 11.07 -07 25 46.3                      J95 = 8O8E90F = Apollo

     K08O13N  C2008 08 03.01299 22 46 08.55 -07 26 03.9                      J95

     K08O13N  C2008 08 03.03181 22 46 05.11 -07 26 30.4          20.8 R      J95

     K08O13N  C2008 08 04.09013 22 42 55.64 -07 50 54.6                      J95

     K08O13N  C2008 08 04.10314 22 42 53.19 -07 51 11.0          21.3 R      J95

     K08O13N FC2008 08 12.97212 22 17 37.23 -10 59 27.7                      J95

     K08O13N FC2008 08 13.00223 22 17 32.36 -11 00 02.8          21.3 R      J95

 

     K08P01E  C2008 08 02.92451 22 37 43.55 +07 15 20.0                      J95 = BK69337 = Amor

     K08P01E  C2008 08 02.95788 22 37 58.24 +07 18 52.8                      J95

     K08P01E  C2008 08 02.98698 22 38 10.92 +07 21 57.4          20.3 R      J95

     K08P01E  C2008 08 04.00896 22 45 44.79 +09 05 00.7          21.1 R      J95

     K08P01E  C2008 08 04.01552 22 45 47.43 +09 05 38.8          19.9 R      J95

 

     K08P01F  C2008 08 04.02609 23 11 03.08 -08 04 09.8                      J95 = BK72401 = Apollo

     K08P01F  C2008 08 04.03019 23 11 04.82 -08 04 07.0                      J95

     K08P01F  C2008 08 04.03428 23 11 06.65 -08 04 04.7          18.6 R      J95

     K08P01F  C2008 08 09.05800 00 08 45.11 -06 28 33.8                      J95

     K08P01F  C2008 08 09.06113 00 08 48.26 -06 28 27.9                      J95

     K08P01F  C2008 08 09.06369 00 08 50.82 -06 28 22.8          18.0 R      J95

     K08P01F  C2008 08 13.13251 01 54 42.73 -02 38 42.9                      J95

     K08P01F  C2008 08 13.13390 01 54 45.76 -02 38 35.5                      J95

     K08P01F  C2008 08 13.13530 01 54 48.75 -02 38 27.7          18.0 R      J95

     K08P01F  C2008 08 14.07305402 31 44.31 -01 07 42.8                      J95

     K08P01F  C2008 08 14.07628202 31 52.25 -01 07 22.4                      J95

     K08P01F  C2008 08 14.07895802 31 58.87 -01 07 06.1          17.8 R      J95

     K08P01F  C2008 08 15.09224 03 16 09.51 +00 43 45.5                      J95

     K08P01F  C2008 08 15.09301 03 16 11.53 +00 43 51.3                      J95

     K08P01F  C2008 08 15.09378 03 16 13.55 +00 43 55.4          18.3 R      J95

 

     K08P01G  C2008 08 04.06995 02 20 55.42 +09 04 42.1                      J95 = BK76531 = Apollo. Found 43' from nominal

     K08P01G  C2008 08 04.07124 02 20 56.64 +09 04 38.9                      J95

     K08P01G  C2008 08 04.07255 02 20 57.81 +09 04 36.1                      J95

     K08P01G  C2008 08 04.07465 02 20 59.62 +09 04 31.8          18.8 R      J95

 

     K08P02F  C2008 08 09.03969 23 37 54.96 -13 32 50.7                      J95 = Amor

     K08P02F  C2008 08 09.04219 23 37 56.76 -13 32 56.0          19.2 R      J95

 

     K08P03Q  C2008 08 08.94635 19 44 28.18 -06 37 48.6                      J95 = MBA

     K08P03Q  C2008 08 09.03018 19 44 24.32 -06 38 03.7                      J95

     K08P03Q  C2008 08 09.03412 19 44 24.18 -06 38 04.4          20.0 R      J95

 

     K08P07G  C2008 08 09.06807 21 20 47.60 -11 09 25.6                      J95 = Apollo

     K08P07G  C2008 08 09.07081 21 20 47.33 -11 09 57.5          19.4 R      J95

 

     K08P16V  C2008 08 12.92165 22 08 58.49 +09 22 49.3                      J95 = Apollo

     K08P16V  C2008 08 12.92499 22 08 58.92 +09 22 23.7                      J95

     K08P16V  C2008 08 12.92831 22 08 59.30 +09 21 58.2          18.0 R      J95

     K08P16V  C2008 08 13.97595 22 11 33.04 +06 53 43.2                      J95

     K08P16V  C2008 08 13.97775 22 11 33.28 +06 53 26.0                      J95

     K08P16V  C2008 08 13.97962 22 11 33.58 +06 53 08.5          18.0 R      J95

 

     K08Q00B  C2008 08 19.91385 21 38 07.11 -11 55 38.9                      J95 = 8Q59B1E = Apollo

     K08Q00B  C2008 08 19.91712 21 38 04.74 -11 56 26.0                      J95

     K08Q00B  C2008 08 19.91920 21 38 03.27 -11 56 55.9                      J95

     K08Q00B  C2008 08 19.92293 21 38 00.62 -11 57 49.6          16.3 R      J95

     K08Q00B  C2008 08 22.87359120 48 40.83 -27 06 18.3                      J95

     K08Q00B  C2008 08 22.87839920 48 33.92 -27 08 07.8                      J95

     K08Q00B  C2008 08 22.88302920 48 27.25 -27 09 53.8                      J95

     K08Q00B  C2008 08 22.88964420 48 17.70 -27 12 24.9          16.7 R      J95

 

     K08Q03T  C2008 08 30.89045 21 41 59.64 +05 01 23.7                      J95 = Apollo

     K08Q03T  C2008 08 30.89461 21 41 59.15 +05 01 23.5                      J95

     K08Q03T  C2008 08 30.89878 21 41 58.67 +05 01 24.2          19.1 R      J95

 

     K08Q03U  C2008 08 30.87219 18 35 07.30 +52 27 48.3                      J95 = Aten

     K08Q03U  C2008 08 30.87774 18 35 07.59 +52 27 28.4                      J95

     K08Q03U  C2008 08 30.88333 18 35 07.99 +52 27 09.0          18.2 R      J95

 

     K08Q11U  C2008 08 31.00764 23 27 30.97 -07 57 23.6                      J95 = Apollo

     K08Q11U  C2008 08 31.01426 23 27 32.20 -07 58 05.1          19.8 R      J95

 

     K08Q20M  C2008 08 31.00764 23 27 06.46 -07 53 55.3                      J95 = GS88VD = MBA = Great Shefford discovery (Väisälä orbit only)

     K08Q20M  C2008 08 31.01286 23 27 06.16 -07 53 55.0                      J95

     K08Q20M  C2008 08 31.01756 23 27 05.95 -07 53 56.3                      J95

     K08Q20M  C2008 08 31.05216 23 27 04.29 -07 53 58.4          19.8 R      J95

     K08Q20M  C2008 08 31.95762 23 26 20.46 -07 55 26.2                      J95

 

     K08Q23K  C2008 08 31.93510 22 42 29.22 +04 14 10.4                      J95 = MBA = confirmation of discovery from station 151 (Markus Griesser)

     K08Q23K  C2008 08 31.94079 22 42 28.95 +04 14 08.1                      J95

     K08Q23K  C2008 08 31.94597 22 42 28.75 +04 14 06.1          19.0 R      J95

 

David Briggs, J69

 

COD J69

OBS David Briggs

MEA David Briggs

TEL 0.40-m f/4.57 Newtonian reflector + CCD

ACK MPCReport file updated 2008.07.28 09:01:28

AC2 dbriggs@kepler.demon.co.uk

NET USNO-A2.0

     K05R34C  C2008 07 26.95779 20 34 54.95 +59 25 56.2          15.9 V      J69

     K05R34C  C2008 07 26.95887 20 34 56.24 +59 26 13.1          15.6 V      J69

     K05R34C  C2008 07 26.95993 20 34 57.64 +59 26 30.1          15.6 V      J69

 

COD J69

OBS David Briggs

MEA David Briggs

TEL 0.40-m f/4.57 Newtonian reflector + CCD

ACK MPCReport file updated 2008.08.25 14:45:16

AC2 dbriggs@kepler.demon.co.uk

NET CMC-14

    CK08Q010  C2008 08 24.89749 18 43 33.09 +49 21 19.1          17.5 N      J69

    CK08Q010  C2008 08 24.90191 18 43 32.25 +49 21 14.6          17.6 N      J69

    CK08Q010  C2008 08 24.90634 18 43 31.47 +49 21 10.1          17.5 N      J69

 

COD J69

OBS David Briggs

MEA David Briggs

TEL 0.40-m f/4.57 Newtonian reflector + CCD

ACK MPCReport file updated 2008.08.31 11:25:19

AC2 dbriggs@kepler.demon.co.uk

NET NOMAD

08567         C2008 08 30.95000 23 43 04.96 +18 41 13.7          12.3 C      J69

08567         C2008 08 30.95384 23 43 06.10 +18 41 08.5          12.3 C      J69

08567         C2008 08 30.95770 23 43 07.33 +18 41 04.3          12.4 C      J69

 

John Fletcher, J93

 

COD J93

OBS John Fletcher

MEA John Fletcher

TEL 0.25-m f/5.5 Schmidt-Cassegrain + CCD

ACK MPCReport file updated 2008.08.04 00:45:58

AC2 jfmto@blueyonder.co.uk

NET USNO-A2.0

01917 C2008 08 03.97162 01 23 08.88 +40 51 32.9 15.2 V J93

01917 C2008 08 03.97374 01 23 09.62 +40 51 33.9 15.2 V J93

01917 C2008 08 03.97586 01 23 10.35 +40 51 33.5 15.2 V J93

04179 C2008 08 04.00052 21 12 09.42 -16 22 36.2 14.8 V J93

04179 C2008 08 04.00264 21 12 09.21 -16 22 36.8 14.8 V J93

04179 C2008 08 04.00476 21 12 09.05 -16 22 37.9 14.7 V J93

08567 C2008 08 03.98008 21 51 26.23 +18 49 58.8 13.9 V J93

08567 C2008 08 03.98571 21 51 27.07 +18 50 04.0 13.8 V J93

08567 C2008 08 03.98782 21 51 27.38 +18 50 05.8 13.8 V J93

11398 C2008 08 04.01986 19 12 00.87 -05 17 56.5 16.1 V J93

11398 C2008 08 04.02410 19 12 00.91 -05 18 07.5 16.2 V J93

11398 C2008 08 04.02832 19 12 00.88 -05 18 18.8 16.2 V J93

35107 C2008 08 03.99206 14 26 55.38 +28 30 34.6 15.0 V J93

35107 C2008 08 03.99417 14 26 54.56 +28 30 18.5 14.9 V J93

35107 C2008 08 03.99628 14 26 53.76 +28 30 01.6 14.9 V J93

 

John notes that at the time of observation 35107, a PHA, was a mere 0.06 AU from Earth.

8567   0.1 AU from home planet. RMS error three images using findorb  0.005

arc seconds.

164400 0.1 AU from home planet.

 

 

COD J93

OBS John Fletcher

MEA John Fletcher

TEL 0.25-m f/5.5 Schmidt-Cassegrain + CCD

ACK MPCReport file updated 2008.09.11 23:53:29

AC2 jfmto@blueyonder.co.uk

NET USNO-A2.0

08567 C2008 09 11.94627 00 52 53.92 +11 51 30.7 12.5 V J93

08567 C2008 09 11.94839 00 52 54.65 +11 51 25.3 12.5 V J93

08567 C2008 09 11.95051 00 52 55.36 +11 51 19.9 12.5 V J93

G4400 C2008 09 11.95850 22 15 07.81 +30 57 36.0 15.1 V J93

G4400 C2008 09 11.96061 22 15 07.57 +30 57 42.1 15.0 V J93

G4400 C2008 09 11.96272 22 15 07.29 +30 57 48.2 15.0 V J93

 

John notes that at the time of observation 8567 was 0.1 AU from Earth and 164400 0.1 AU from Earth.

 

Kevin Hills, J66

 

COD J66

CON K.Hills, Kinver, England [kinverhills@aol.com]

OBS K.Hills

MEA K.Hills

TEL 0.41-m f/6.9 Ritchey-Chretien + CCD

ACK MPCReport file updated 2008.07.20 00:50:28

AC2 kinverhills@aol.com

NET USNO-B1.0

01636         C2008 07 19.95155 19 29 08.04 -15 23 40.9          15.3 V      J66

01636         C2008 07 19.95977 19 29 07.49 -15 23 42.7          15.5 V      J66

01636         C2008 07 19.96799 19 29 06.96 -15 23 44.5          15.6 V      J66

01636         C2008 07 19.97620 19 29 06.43 -15 23 46.4          15.6 V      J66

01636         C2008 07 19.98443 19 29 05.89 -15 23 48.3          15.7 V      J66

35107         C2008 07 19.92325 15 29 48.48 +45 06 12.0          15.3 V      J66

35107         C2008 07 19.92484 15 29 48.19 +45 06 08.7          15.0 V      J66

35107         C2008 07 19.92641 15 29 48.00 +45 06 04.5          14.5 V      J66

35107         C2008 07 19.92800 15 29 47.60 +45 06 02.1          14.9 V      J66

35107         C2008 07 19.92958 15 29 47.28 +45 05 58.7          15.2 V      J66

 

COD J66

CON K.Hills, Kinver, England [kinverhills@aol.com]

OBS K.Hills

MEA K.Hills

TEL 0.41-m f/6.9 Ritchey-Chretien + CCD

ACK MPCReport file updated 2008.07.27 01:56:09

AC2 kinverhills@aol.com

NET USNO-B1.0

     K08M01U  C2008 07 26.97010 19 37 08.38 +17 29 02.1          18.3 V      J66

     K08M01U  C2008 07 26.97010 19 37 08.38 +17 29 02.1          18.3 V      J66

     K08M01U  C2008 07 26.97734 19 37 05.28 +17 30 21.3          17.6 V      J66

     K08M01U  C2008 07 26.97955 19 37 04.28 +17 30 45.2          18.1 V      J66

     87P1183  C2008 07 27.01058 21 02 31.32 -16 50 37.6          18.1 V      J66

     87P1183  C2008 07 27.01215 21 02 30.99 -16 50 36.4          18.1 V      J66

     87P1183  C2008 07 27.01374 21 02 30.56 -16 50 36.1          17.4 V      J66

     87P1183  C2008 07 27.01532 21 02 30.24 -16 50 37.5          18.1 V      J66

     87P1183  C2008 07 27.02244 21 02 28.66 -16 50 38.2          18.0 V      J66

     87P1183  C2008 07 27.02402 21 02 28.28 -16 50 39.0          18.1 V      J66

     87P1183  C2008 07 27.02564 21 02 27.95 -16 50 38.7          18.0 V      J66

     87P1183  C2008 07 27.02881 21 02 27.18 -16 50 39.1          17.9 V      J66

     87P1183  C2008 07 27.03041 21 02 26.87 -16 50 39.4          18.1 V      J66

     K08N00U  C2008 07 26.99153 00 43 35.70 +21 32 53.1          17.6 V      J66

     K08N00U  C2008 07 26.99390 00 43 35.97 +21 33 00.8          17.6 V      J66

     K08N00U  C2008 07 26.99626 00 43 36.14 +21 33 03.8          17.4 V      J66

     K08N00U  C2008 07 26.99863 00 43 36.49 +21 33 09.1          18.0 V      J66

     K08N00U  C2008 07 27.00100 00 43 36.62 +21 33 13.4          17.7 V      J66

     K08N00U  C2008 07 27.00337 00 43 36.87 +21 33 17.7          17.8 V      J66

 

Images

 

Images of high-ecliptic asteroids obtained by Maurice Gavin on 2008 July 8/10 can be found by following the links below.

 

http://www.cloudynights.com/ubbthreads/attachments/2507792-lickzulu080708mg.jpg

http://www.cloudynights.com/ubbthreads/attachments/2509916-zulu080708mgx2.jpg

http://www.cloudynights.com/ubbthreads/attachments/2509959-lick080708mgx2.jpg

http://www.cloudynights.com/ubbthreads/attachments/2512456-mp35107-080710set.jpg

 

Maurice comments ‘on the latter date through hazy high numbered MP35107 in Hercules, which due to its relative proximity to earth of ~0.12 AU, is an order of magnitude nearer than Lick and Zulu at the time and hence 'bright'!’

 

Occultations

 

Andrew Elliott

 

ASTEROIDAL OCCULTATION - REPORT FORM

====================================

 

EAON - EUROPEAN ASTEROIDAL OCCULTATION NETWORK

 

1. DATE: 2008 Aug 05   STAR: TYC 4686-01249-1   ASTEROID: (4711) Kathy

 

2. OBSERVER Name:  Andrew Elliott         Abbr: ELL

   Address:  White Lodge, Bank Lane, Warton, PRESTON, PR4 1TB, UK

   Tel: +44 (0)1772 632450    Email:  ae@f2s.com

 

3. OBSERVING STATION - Warton Bank Observatory North - fixed single station

   Nearest City:  PRESTON, UK

   Latitude :  53d 44' 25.6"N

   Longitude: 002d 54' 25.4"W

   Height above ellipsoid: 65m (EGM96 Geoid Height = 52.4m)

   Datum WGS 84 - all coordinates GPS averaged 24hrs.

 

4. TIMING OF EVENTS     OCCULTATION RECORDED?  NEGATIVE

   Type of event:

   (S)tart observation  (I)nterrupt start  (D)isappearance (B)link (F)lash

   (E)nd observation    (J)Interrupt end   (R)eappearance  (O)ther (specify)

 

   Event     Time (UTC)     Accuracy

   Code    (HH MM SS.ss)   (+/-S.ss)

   S        01 26       (Central predicted time here: ~01:28:20 UT)

   E        01 30

 

5. TELESCOPE Type:  Schmidt-Cassegrain     Aperture:  406mm + f/3.3 reducer

             Mount: Altazimuth 'goto'      Motor drive: Yes

   Magnification: Video f.o.v. ~ 15' x 11'

 

6. TIMING AND RECORDING

   Timekeeping: GPS receiver - Garmin 35 HVS, 1pps output into:

   Mode: On-screen display   - BlackBoxCamera 'STVASTRO' GPS video Date/Time

                               inserter.

   Device: DV camcorder recording of Watec 902H video camera at Cass. focus.

   Backup: MSF 60KHz time signal beeps on audio track - synch. confirmed.

 

7. OBSERVING CONDITIONS

   Atmospheric transparency:  Fair   Wind:  Nil  Temperature: +10C

   Star image stability    :  Fair   Star altitude: +18 degrees

   Slight scintillation - no break greater than 0.1 sec

   Minor Planet visible on video? No

 

8. OBSERVATION QUALITY -   Good

 

9. ADDITIONAL COMMENTS

   Report submitted to Gilles Regheere and PLANOCCULT.

   Positive not expected here - on northern 2 sigma line.

 

Best Regards:  Andrew Elliott

Date: 2008 August 05

(Rev. Oct 07)

 

Photometry

 

Richard Miles

 

In response to the following posting the MPML;

 

Arecibo and Goldstone radar observations have revealed that 2005 RC34 has a very rough surface, and given recent observations of other NEAs, we suspect it might be an E-class object (analogous to the enstatite achondrite meteorites). Is anyone planning to get spectroscopy?

Also, to the best of my knowledge the rotation period is unknown. Is anyone planning to obtain photometry?

Best wishes,

Lance Benner (on behalf of the radar team)

----------------------------------------------------------
Dr. Lance A. M. Benner
Research Scientist phone: 818-354-7412
Mail Stop 300-233 fax: -9476
Jet Propulsion Laboratory e-mail: lance@reason.jpl.nasa.gov
4800 Oak Grove Drive http://echo.jpl.nasa.gov/
Pasadena, CA 91109-8099

 

Richard Miles obtained the lightcurves shown below.

Richard states that based on images taken between July 20.925-21.095 UT, i.e. 4.1 hours duration, and phase angle of 39.5-40.5 deg, the object appears to have a rotation period of 5.4 +/- 0.4 hr (U=2) and a lightcurve amplitude of 0.12 mag. Mean V magnitude = 14.13. Composite lightcurve based on 172 datapoints, st.dev. = 0.026 mag per datapoint (left hand image above).

 

The right hand image above shows the lightcurve of the asteroid obtained on 2008 July 23. This was obtained by processing  1360 images obtained over a 4.8-hour observing run. As can be seen the aspect is quite different, presumably the object is rotating virtually pole-on to the Earth at this time.

 

Index to observations received from ARPS members

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