Table of contents

 

Index to observations received from ARPS members

 

Observations received FROM ARPS MEMBERS

 

JUNE/JULY 2007

 

Astrometry

 

Peter Birtwhistle, J95

 

Peter comments - May was a fairly quiet month and although images were taken on 14 nights, the short summer nights and frequent cloud interruption meant that just a dozen or so NEOs were observed and only three of those over more than just a single night. However, plenty of images were taken on several of those nights searching for new objects on the NEO Confirmation page with large positional uncertainties that were eventually either lost or marked up as 'does not exist'. During the month, as further observations came in, one of the four Great Shefford Main Belt discoveries mentioned last month, 2007 GA was identified with object 2004 TN200, discovered by Spacewatch and followed for 2 weeks in Oct 2004. The earlier apparition was then assigned as the principal designation along with discovery credit. Another Great Shefford designation, 2004 VM64 which had only been observed on two nights in Nov 2004 was re-discovered this April by the Catalina Sky Survey and as the 2004 observations were not enough to provide a good orbit, this time the 2007 apparition (2007 HG7) was given principal designation and Catalina the discovery credit... Just going to prove that the value of stock can go down as well as up!

 

41105         C2007 05 05.97427 13 27 16.64 +00 42 36.6                      J95 = MBA

41105         C2007 05 05.98210 13 27 16.25 +00 42 35.7          18.5 R      J95

41105         C2007 05 07.91065 13 25 53.17 +00 41 00.9                      J95

41105         C2007 05 07.92138 13 25 52.71 +00 41 00.1                      J95

41105         C2007 05 07.93419 13 25 52.15 +00 40 59.7          18.8 R      J95

 

57366         C2007 05 07.95088 14 47 44.89 -09 42 33.4                      J95 = MBA

57366         C2007 05 07.96707 14 47 43.95 -09 42 27.2                      J95

57366         C2007 05 07.97588 14 47 43.41 -09 42 23.8          19.6 R      J95

 

C2729         C2007 05 07.95088 14 46 49.32 -09 58 38.3                      J95 = MBA

C2729         C2007 05 07.96707 14 46 48.35 -09 58 34.9                      J95

C2729         C2007 05 07.97588 14 46 47.85 -09 58 31.6          20.1 R      J95

 

F6285         C2007 05 17.96684 14 38 59.50 -09 40 10.9                      J95 = MBA

F6285         C2007 05 17.98127 14 38 58.63 -09 40 07.1          20.3 R      J95

 

F7382         C2007 05 07.95088 14 47 04.56 -09 50 32.7                      J95 = MBA

F7382         C2007 05 07.96707 14 47 03.67 -09 50 29.9                      J95

F7382         C2007 05 07.97588 14 47 03.18 -09 50 28.3          19.4 R      J95

 

     K03N08L  C2007 05 18.09293 17 26 52.29 -07 39 16.9                      J95 = MBA

     K03N08L  C2007 05 18.09481 17 26 52.26 -07 39 16.0          19.6 R      J95

     K03N08L  C2007 05 20.04338 17 25 44.00 -07 23 04.0                      J95

     K03N08L  C2007 05 20.08921 17 25 42.28 -07 22 42.4                      J95

     K03N08L  C2007 05 20.09588 17 25 42.07 -07 22 38.1          19.3 R      J95

 

     K03R10V  C2007 05 19.09783 18 00 45.44 +24 31 00.0                      J95 = MBA

     K03R10V  C2007 05 19.10203 18 00 45.40 +24 31 04.3                      J95

     K03R10V  C2007 05 19.10623 18 00 45.31 +24 31 09.1          19.2 R      J95

 

     K04K17H  C2007 05 30.94737 16 47 51.21 +40 57 32.3                      J95 = Aten

     K04K17H  C2007 05 30.94966 16 47 48.12 +40 57 32.5          18.9 R      J95

 

     K04P35O  C2007 05 07.95088 14 47 56.38 -09 48 32.9                      J95 = MBA

     K04P35O  C2007 05 07.96707 14 47 55.37 -09 48 28.6                      J95

     K04P35O  C2007 05 07.97588 14 47 54.83 -09 48 26.6          19.5 R      J95

 

     K07D08K  C2007 05 29.97314 22 35 08.39 +78 25 14.2                      J95 = Apollo

     K07D08K  C2007 05 29.98077 22 35 09.49 +78 25 02.9          20.0 R      J95

 

     K07H04Q  C2007 05 07.95088 14 47 20.83 -09 50 12.4                      J95 = MBA

     K07H04Q  C2007 05 07.96707 14 47 20.01 -09 50 11.4                      J95

     K07H04Q  C2007 05 07.97588 14 47 19.54 -09 50 10.9          20.0 R      J95

     K07H04Q  C2007 05 17.96464 14 39 06.56 -09 42 04.9                      J95

     K07H04Q  C2007 05 17.98372 14 39 05.69 -09 42 05.0          19.7 R      J95

 

     K07H05B  C2007 05 07.91065 13 26 25.81 +00 43 25.7                      J95 = MBA

     K07H05B  C2007 05 07.92138 13 26 25.40 +00 43 25.4                      J95

     K07H05B  C2007 05 07.93419 13 26 24.91 +00 43 25.4                      J95

     K07H05B  C2007 05 07.98705 13 26 22.75 +00 43 24.3          20.3 R      J95

 

     K07H44G  C2007 05 02.88820 11 51 40.32 +15 42 14.0                      J95 = Apollo

     K07H44G  C2007 05 02.90346 11 51 41.48 +15 41 43.6                      J95

     K07H44G  C2007 05 02.92025 11 51 42.76 +15 41 10.9          20.3 R      J95

 

     K07J00D  C2007 05 07.89436 12 51 27.32 -20 13 39.4                      J95 = 7J78644 = Apollo

     K07J00D  C2007 05 07.89628 12 51 24.15 -20 13 16.0                      J95

     K07J00D  C2007 05 07.89820 12 51 20.97 -20 12 51.7                      J95

     K07J00D  C2007 05 07.90037 12 51 17.38 -20 12 24.4                      J95

     K07J00D  C2007 05 07.90327 12 51 12.54 -20 11 48.5          18.1 R      J95

 

     K07J16G  C2007 05 25.00644 17 44 25.43 -03 34 28.1                      J95 = Amor

     K07J16G  C2007 05 25.01561 17 44 29.29 -03 33 51.1                      J95

     K07J16G  C2007 05 25.02713 17 44 34.03 -03 33 04.2          20.3 R      J95

 

     K07J20Z  C2007 05 29.94250 15 54 32.79 +68 17 03.2                      J95 = Apollo

     K07J20Z  C2007 05 29.94823 15 54 31.92 +68 17 16.6                      J95

     K07J20Z  C2007 05 29.95396 15 54 31.05 +68 17 30.4          19.5 R      J95

 

     K07J21B  C2007 05 12.94149 16 48 17.75 +43 35 12.7                      J95 = BD74280 = Aten

     K07J21B  C2007 05 12.94288 16 48 16.36 +43 35 24.8                      J95

     K07J21B  C2007 05 12.94426 16 48 14.96 +43 35 37.6          18.6 R      J95

     K07J21B  C2007 05 18.04591 16 11 34.09 +48 13 49.0                      J95

     K07J21B  C2007 05 18.05322 16 11 31.92 +48 13 57.0                      J95

     K07J21B  C2007 05 18.06053 16 11 29.74 +48 14 04.9          20.0 R      J95

     K07J21B  C2007 05 18.93949 16 08 50.01 +48 29 07.1                      J95

     K07J21B  C2007 05 18.95102 16 08 47.15 +48 29 19.6                      J95

     K07J21B  C2007 05 18.96258 16 08 44.19 +48 29 33.6          20.7 R      J95

 

     K07J22F  C2007 05 17.90988 08 54 06.87 +39 50 47.8                      J95 = Amor

     K07J22F  C2007 05 17.91407 08 54 07.89 +39 50 40.3                      J95

     K07J22F  C2007 05 17.91828 08 54 08.91 +39 50 32.8          18.8 R      J95

     K07J22F  C2007 05 29.91263 09 40 39.92 +33 23 22.9                      J95

     K07J22F  C2007 05 29.92170 09 40 41.93 +33 23 04.1                      J95

     K07J22F  C2007 05 29.92748 09 40 43.16 +33 22 52.0          19.5 R      J95

 

     K07J22H  C2007 05 12.95561 17 53 30.22 +41 44 14.5                      J95 = Apollo

     K07J22H  C2007 05 12.95819 17 53 29.27 +41 43 48.0          19.1 R      J95

 

     K07J40E  C2007 05 17.92454 16 42 29.69 +13 43 52.4                      J95 = 7JB1A8C = Amor

     K07J40E  C2007 05 17.92874 16 42 29.90 +13 44 09.9                      J95

     K07J40E  C2007 05 17.93311 16 42 30.04 +13 44 27.5          19.6 R      J95

 

     K07K00E  C2007 05 17.89923 16 35 20.61 +22 11 15.6                      J95 = 7K3197C = Apollo

     K07K00E  C2007 05 17.90216 16 35 19.77 +22 10 38.4                      J95

     K07K00E  C2007 05 17.90507 16 35 18.98 +22 10 01.0          19.4 R      J95

 

     K07K02V  C2007 05 23.07029 15 11 01.91 +04 02 28.3                      J95 = 7K346E9 = Apollo

     K07K02V  C2007 05 23.07350 15 11 02.37 +04 02 45.2          20.1 R      J95

     K07K02V  C2007 05 24.96587 15 15 23.20 +06 17 08.6          20.2 R      J95

     K07K02V  C2007 05 24.97936 15 15 24.38 +06 17 56.0          21.0 R      J95

     K07K02V  C2007 05 24.99288 15 15 25.57 +06 18 43.1          20.0 R      J95

 

     K07K02W  C2007 05 23.08085 16 15 07.74 +15 24 35.7                      J95 = 7K346EF = Amor

     K07K02W  C2007 05 23.08377 16 15 09.34 +15 24 51.2                      J95

     K07K02W  C2007 05 23.08670 16 15 10.94 +15 25 07.0          18.7 R      J95

 

     K07K04E  C2007 05 24.91532 15 26 52.68 -03 32 03.3                      J95 = Amor

     K07K04E  C2007 05 24.91647 15 26 54.16 -03 32 34.7                      J95

     K07K04E  C2007 05 24.91762 15 26 55.57 -03 33 05.3          17.9 R      J95

 

Peter comments - As anyone in the UK will already know, the poor weather in May just got worse through June. I suffered the least number of hours observing since December 2002. As mentioned in TA 43,516 p328 (April 2007) the unusual object with provisional designation 6R10DB9 made it's fourth and final perigee in June. Back during the March perigee it was observed with the 10-m SALT telescope and found to have a rotation period of only 2.75 minutes and an amplitude at that time of 1.2 magnitudes. This time it approached from the sunward side of the Earth, passed over the North pole and was picked up again a day after perigee on June 15th in Draco, about 1 degree from Theta Cep while only 0.80 Lunar Distances from Earth, magnitude +19 - +20 and moving at 47"/min. Never 'bright', it was recorded at mag +18.6 on June 18th and at about +19.5 on the 20th, fading again as it receded from both Sun and Earth. The only other observations reported at the time of writing are radar detections from Goldstone on June 12 & 14 and optical astrometry from the 1.5-m Mt Lemmon telescope on June 22. By the end of June it was below 20th mag and too far south to attempt from the UK.

The main indicator that this object is likely to be natural rather than a piece of artificial space junk come from determinations of solar radiation pressure (SRP) acting on it. Bill Gray's FindOrb freeware program includes routines to calculate SRP, given as the area-to-mass ratio or AMRAT in m^2/kg. With astrometry extending for 10 months now, it gives a value of 0.0011, with an RMS residual from 132 observations of 2.5". Not including SRP increases the RMS residual to an unsatisfactory 9.1". The JPL Horizons orbit solution which also includes the Goldstone Radar observations, gives an even smaller value of AMRAT of 0.0007. In comparison, various distant artificial satellites, such as IMP8, Geotail, J002E3 (the piece of old Apollo hardware discovered by Bill Yeung in 2003), WMAP etc have values between 10 and 50 times larger, indicating that 6R10DB9 is much more massive and much less prone to the perturbing effects of SRP than artificial satellites and is therefore likely to be a rocky body, probably about 4 metres in diameter. There is still a chance that time might be spent at some of the large observatories to get spectra and other measurements during July before it goes out of range completely.

 

     K04V65K  C2007 06 18.97982 19 19 59.94 -17 21 05.8                      J95 = MBA = 3rd opp recovery of GS discovery

     K04V65K  C2007 06 18.98554 19 19 59.66 -17 21 05.6                      J95

     K04V65K  C2007 06 18.99127 19 19 59.40 -17 21 05.3          18.8 R      J95

 

     K05N44W  C2007 06 11.93185 22 18 19.13 +45 37 24.4                      J95 = Aten = Recovery at 2nd opp

     K05N44W  C2007 06 11.93566 22 18 13.72 +45 37 24.3                      J95

     K05N44W  C2007 06 11.93918 22 18 08.71 +45 37 24.2          17.9 R      J95

     K05N44W  C2007 06 12.00965 22 16 26.94 +45 37 23.1                      J95

     K05N44W  C2007 06 12.01152 22 16 24.22 +45 37 23.0                      J95

     K05N44W  C2007 06 12.01341 22 16 21.44 +45 37 22.6          17.6 R      J95

 

6R10DB9       C2007 06 15.95047420 20 10.06 +62 30 18.3          20.3 R      J95 = 6R10DB9 = Possible natural object in temporary geocentric orbit

6R10DB9       C2007 06 15.95565920 20 03.14 +62 24 28.6          19.7 R      J95

6R10DB9       C2007 06 15.95984520 19 57.22 +62 19 47.1          20.2 R      J95

6R10DB9       C2007 06 15.97969420 19 27.19 +61 57 21.2          19.0 R      J95

6R10DB9       C2007 06 18.95308 20 18 40.91 +16 57 22.9          19.0 R      J95

6R10DB9       C2007 06 18.95491 20 18 40.11 +16 56 23.4          19.0 R      J95

6R10DB9       C2007 06 18.95759 20 18 38.98 +16 54 54.4          19.1 R      J95

6R10DB9       C2007 06 18.95964 20 18 38.03 +16 53 46.5          19.2 R      J95

6R10DB9       C2007 06 18.96135 20 18 37.26 +16 52 49.5          18.9 R      J95

6R10DB9       C2007 06 18.99651 20 18 18.54 +16 33 23.2          18.7 R      J95

6R10DB9       C2007 06 18.99858 20 18 17.27 +16 32 14.3          18.6 R      J95

6R10DB9       C2007 06 19.00039 20 18 16.23 +16 31 14.3          18.6 R      J95

6R10DB9       C2007 06 19.00236 20 18 15.11 +16 30 07.9          18.7 R      J95

6R10DB9       C2007 06 20.97441 20 18 22.97 +00 50 00.1          19.7 R      J95

6R10DB9       C2007 06 20.98051 20 18 20.39 +00 47 40.6          19.3 R      J95

6R10DB9       C2007 06 20.98605 20 18 17.98 +00 45 32.6          19.7 R      J95

6R10DB9       C2007 06 21.02697 20 17 58.02 +00 29 52.4          19.1 R      J95

 

     K07G03S WC2007 06 28.06450 01 14 33.28 +63 54 54.3                      J95 = Apollo

     K07G03S  C2007 06 28.06998 01 14 34.14 +63 54 51.8          20.0 R      J95

 

     K07L00A  C2007 06 10.92330 15 15 39.31 +49 59 32.4                      J95 = Apollo

     K07L00A  C2007 06 10.92846 15 15 35.33 +50 00 52.5                      J95

     K07L00A  C2007 06 10.93185 15 15 32.71 +50 01 44.2          20.0 R      J95

 

     K07L00D  C2007 06 10.94557 12 33 56.51 +13 16 09.2                      J95 = Apollo

     K07L00D  C2007 06 10.94975 12 33 58.13 +13 16 09.1                      J95

     K07L00D  C2007 06 10.95395 12 33 59.84 +13 16 08.4          19.0 R      J95

 

     K07L00E  C2007 06 10.91419 12 56 38.47 -06 11 19.6                      J95 = Apollo

     K07L00E  C2007 06 10.91590 12 56 38.99 -06 11 53.2                      J95

     K07L00E  C2007 06 10.91761 12 56 39.49 -06 12 26.2          16.8 R      J95

 

     K07L00F  C2007 06 10.96735 15 06 10.75 +15 44 23.7                      J95 = Apollo

     K07L00F  C2007 06 10.96889 15 06 11.99 +15 44 20.3                      J95

     K07L00F  C2007 06 10.97042 15 06 13.24 +15 44 16.9          16.6 R      J95

 

     K07L00L  C2007 06 10.95831 13 53 17.51 -04 37 55.4                      J95 = Aten

     K07L00L  C2007 06 10.96124 13 53 17.82 -04 37 49.7                      J95

     K07L00L  C2007 06 10.96417 13 53 18.12 -04 37 43.1          18.4 R      J95

 

     K07L00Y  C2007 06 10.93837 16 45 23.33 -04 10 12.6                      J95 = Station 185 discovery = MBA

     K07L00Y  C2007 06 10.98474 16 45 21.01 -04 10 18.3                      J95

     K07L00Y  C2007 06 10.99289 16 45 20.55 -04 10 19.9          19.4 R      J95

     K07L00Y  C2007 06 11.95500 16 44 32.37 -04 12 27.1                      J95

     K07L00Y  C2007 06 12.02821 16 44 28.58 -04 12 37.2                      J95

     K07L00Y  C2007 06 12.04863 16 44 27.51 -04 12 38.8          19.6 R      J95

 

     K07L19T  C2007 06 18.96932 18 02 20.00 +05 14 31.6                      J95 = Amor

     K07L19T  C2007 06 18.97043 18 02 21.45 +05 14 56.0                      J95

     K07L19T  C2007 06 18.97227 18 02 23.93 +05 15 37.2          18.5 R      J95

 

     K07L32R  C2007 06 21.03271 20 56 41.21 -08 38 52.8                      J95 = SW40aH = Amor

     K07L32R  C2007 06 21.03670 20 56 41.53 -08 38 46.0                      J95

     K07L32R  C2007 06 21.04069 20 56 41.84 -08 38 39.1                      J95

     K07L32R  C2007 06 21.05979 20 56 43.33 -08 38 05.9          18.2 R      J95

 

     K07M00Q  C2007 06 18.91286 15 57 58.48 +05 08 42.3                      J95 = 7M39C21 = Apollo

     K07M00Q  C2007 06 18.93076 15 57 21.24 +05 18 33.2                      J95

     K07M00Q  C2007 06 18.93166 15 57 19.38 +05 19 02.4                      J95

     K07M00Q  C2007 06 18.93255 15 57 17.52 +05 19 31.8          17.6 R      J95

     K07M00Q  C2007 06 20.92470313 19 11.12 +37 47 34.6                      J95

     K07M00Q  C2007 06 20.92557913 19 02.71 +37 48 36.1                      J95

     K07M00Q  C2007 06 20.92644713 18 54.22 +37 49 37.4          18.0 R      J95

 

     K07M00R  C2007 06 18.94327 16 24 25.02 +23 38 19.6                      J95 = 7M39CEA = Apollo

     K07M00R  C2007 06 18.94556 16 24 24.39 +23 38 24.2                      J95

     K07M00R  C2007 06 18.94785 16 24 23.77 +23 38 29.6          19.7 R      J95

     K07M00R  C2007 06 27.93211 15 43 45.57 +27 59 35.2                      J95

     K07M00R  C2007 06 27.93781 15 43 43.89 +27 59 43.3                      J95

     K07M00R  C2007 06 27.94352 15 43 42.17 +27 59 51.2          19.3 R      J95

 

     K07M04B  C2007 06 21.00958 16 54 26.89 -12 39 30.2                      J95 = BD86929 = Apollo

     K07M04B  C2007 06 21.01432 16 54 27.27 -12 39 16.2                      J95

     K07M04B  C2007 06 21.01973 16 54 27.69 -12 39 00.7          18.6 R      J95

 

     K07M04C  C2007 06 20.99348 16 52 12.34 +32 22 01.3          19.8 R      J95 = 7M3A0BE = Aten

     K07M04C  C2007 06 20.99577 16 52 11.76 +32 21 48.4          20.2 R      J95

     K07M04C  C2007 06 20.99989 16 52 10.68 +32 21 27.7          20.5 R      J95

 

     K07M06H  C2007 06 21.05126 00 50 54.70 +31 46 17.8                      J95 = 7M3A41B = Mars-crosser

     K07M06H  C2007 06 21.07351 00 50 58.56 +31 46 53.9                      J95

     K07M06H  C2007 06 21.07983 00 50 59.73 +31 47 02.2          19.3 R      J95

 

     K07M13L  C2007 06 27.97932 16 50 20.80 +36 05 19.1                      J95 = Amor

     K07M13L  C2007 06 27.98502 16 50 20.56 +36 05 05.4                      J95

     K07M13L  C2007 06 27.99072 16 50 20.30 +36 04 50.9          19.7 R      J95

 

     K07M20T  C2007 06 27.99729 18 44 44.54 +33 04 27.1                      J95 = Apollo

     K07M20T  C2007 06 28.00022 18 44 44.29 +33 04 43.7                      J95

     K07M20T  C2007 06 28.00288 18 44 44.03 +33 04 58.4          18.5 R      J95

 

     K07M24B  C2007 06 27.94998 20 07 39.08 +32 55 46.1                      J95 = Apollo

     K07M24B  C2007 06 27.95307 20 07 37.02 +32 55 50.5                      J95

     K07M24B  C2007 06 27.95598 20 07 35.06 +32 55 54.6          18.0 R      J95

     K07M24B  C2007 06 29.93390 19 47 10.57 +33 28 29.7                      J95

     K07M24B  C2007 06 29.93702 19 47 08.77 +33 28 31.6                      J95

     K07M24B  C2007 06 29.93874 19 47 07.75 +33 28 33.3                      J95

     K07M24B  C2007 06 29.94030 19 47 06.84 +33 28 33.9          18.0 R      J95

 

David Briggs, J69

 

 

     J98U01L  C2007 05 17.95613 11 03 41.30 +10 54 31.1          15.9 R      J69

     J98U01L  C2007 05 17.95721 11 03 41.54 +10 54 36.6          16.0 R      J69

     J98U01L  C2007 05 17.95828 11 03 41.75 +10 54 40.7          16.0 R      J69

     K06K89E  C2007 05 17.97520 16 55 43.44 +42 24 19.1          17.1 R      J69

     K06K89E  C2007 05 17.97728 16 55 42.94 +42 24 22.2          16.9 R      J69

     K06K89E  C2007 05 17.97936 16 55 42.40 +42 24 24.7          17.1 R      J69

     K07F01K  C2007 05 17.94868 17 41 31.10 +25 51 23.6          16.2 R      J69

     K07F01K  C2007 05 17.94975 17 41 31.97 +25 51 22.4          16.3 R      J69

     K07F01K  C2007 05 17.95082 17 41 32.87 +25 51 21.6          16.2 R      J69

 

Images

 

Michael Clarke

 

 

Maurice Gavin

 

An image of Vesta by Maurice can be viewed at: http://www.cloudynights.com/ubbthreads/attachments/1665643-vesta070615mg.jpg

 

Grant Privett

 

Notes on images and mpegs of 2007 HA

 

Observer:         Grant Privett

Date:                17th –18th April 2007.

Location:          Lower Eggleton, Ledbury, Herefordshire.

Instrument:        250mm F4.4 Newtonian.

CCD:               Starlight SXV-M7 monochrome. No filter.

Conditions:       Reasonably clear – not perfect, some haze.

 

Single image

30s exposure with above setup. Nominal time: 22:01 UT. Adjacent galaxy  is NGC4392

 

 

Occultations

 

Richard Sargent

 

Observations of the recent close approach of Asteroid 2006 VV2 to star HIP 51892. The observations were made using an astronomical video camera. Although at the time I watched the asteroid not through the eyepiece but indirectly by viewing the video camera output on a TV screen, it was fascinating to see it moving across the sky. It wasn’t until it was very close to star HIP 51892 that it became clear that it wasn’t going to occult the star. A very satisfying observation which I hope you will find useful.

 

The movie was too large to upload to the ARPS website - RD

 

Frame no.

5

87

185

260

450

547

 

V1

2.356

2.178

2.7

2.192

2.094

2.315

 

V2

0.056

0.254

0.589

0.158

 

0.182

 

C2-C1

2.3

1.924

2.111

2.041

2.12

2.133

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Index to observations received from ARPS members

 

Table of contents