Table of contents

 

Index to observations received from ARPS members

 

Observations received FROM ARPS MEMBERS

 

July and August 2009

 

Astrometry

 

Peter Birtwhistle, J95

 

2009 has provided some exceptional statistics for Great Shefford so far, more usable nights (103) & more hours used (455) in the first 6 months of the year since the observatory was commissioned in 2002, beating the previous best Jan-June (2005) by 10%. Hopefully the last half of the year will be equally good.

June started with the close fly-by of Apollo 2009 KL8, passing Earth at 5 Lunar Distances (LD) on June 2nd. That night it was moving at 60"/min and fading fast, from 19th to 20th mag. during the course of the night. Two nights before, even though about 30% further away it was about 1.5 magnitudes brighter because of its smaller phase angle and I followed it that night for 1h 45 minutes to try and determine its rotation period. That turned out to be just 2 mins 41 seconds, varying by 0.75 magnitudes and it had managed to complete 32 rotations while I was observing it!

Another close approach occurred on June 24 at 16:50 UT when 2009 MU passed at 2.3 LD. The night before it had been well placed throughout the few dark hours available from the UK and was followed at mag. +16, its speed accelerating beyond 100"/min by dawn. Initial indications are that its lightcurve is irregular, suggesting that it may be tumbling, but further analysis needs to be completed.

72091 C2009 06 01.00658 16 18 24.88 -11 26 16.2 18.7 R J95 = MBA

 

K01F90E C2009 06 26.00834814 03 29.39 +28 30 45.9 15.8 R J95 = Apollo

K01F90E C2009 06 26.01232114 03 38.83 +28 29 02.4 14.7 R J95

K01F90E C2009 06 26.01644114 03 48.63 +28 27 14.7 14.7 R J95

K01F90E C2009 06 26.97029314 45 40.11 +20 13 55.8 13.9 R J95

K01F90E C2009 06 26.97366414 45 49.31 +20 11 50.2 14.8 R J95

K01F90E C2009 06 26.97702314 45 58.50 +20 09 44.8 13.9 R J95

K01F90E C2009 06 27.98141315 35 38.90 +08 17 12.6 13.2 R J95

K01F90E C2009 06 27.98425415 35 47.32 +08 14 58.3 13.3 R J95

K01F90E C2009 06 27.98729715 35 56.36 +08 12 34.2 14.2 R J95

 

K05N63J C2009 06 30.02133 19 15 11.82 +34 07 30.1 J95 = Aten

K05N63J C2009 06 30.05797 19 14 58.12 +34 04 38.7 19.5 R J95

K05N63J C2009 06 30.07606 19 14 51.22 +34 03 14.7 J95

 

K09K08L C2009 06 01.05872819 51 47.48 +65 49 06.1 18.4 R J95 = Apollo

K09K08L C2009 06 01.06096519 52 19.64 +65 50 14.0 18.6 R J95

K09K08L C2009 06 01.06374519 52 59.65 +65 51 37.5 18.6 R J95

K09K08L C2009 06 01.94829823 42 51.03 +61 37 42.4 J95

K09K08L C2009 06 01.95514023 44 11.77 +61 31 21.7 19.4 R J95

K09K08L C2009 06 01.96221523 45 34.19 +61 24 45.6 19.3 R J95

K09K08L C2009 06 02.05271700 02 02.73 +59 57 19.3 J95

K09K08L C2009 06 02.06048800 03 21.93 +59 49 32.5 20.1 R J95

K09K08L C2009 06 02.06788000 04 36.47 +59 42 07.2 J95

 

K09K21V C2009 06 01.00658 16 18 52.32 -11 27 22.6 20.3 R J95 = Apollo

 

K09K22J C2009 06 02.03068 19 47 20.76 -13 58 13.5 J95 = AST329 = Amor

K09K22J C2009 06 02.03942 19 47 22.42 -13 57 56.2 J95

K09K22J C2009 06 02.04533 19 47 23.47 -13 57 44.8 19.2 R J95

 

K09K22K C2009 06 01.97058 16 41 04.30 -15 56 20.8 J95 = A01732 = MBA

K09K22K C2009 06 01.97755 16 41 03.80 -15 56 11.0 J95

K09K22K C2009 06 01.98530 16 41 03.29 -15 56 00.3 18.1 R J95

 

K09L00A C2009 06 01.93143 16 31 57.24 +00 09 35.7 J95 = Apollo

K09L00A C2009 06 01.93625 16 31 59.58 +00 10 50.6 J95

K09L00A C2009 06 01.94097 16 32 01.82 +00 12 03.9 19.0 R J95

 

K09L00B C2009 06 01.91395 16 35 37.38 -01 40 30.8 J95 = 9L05FE9 = Mars-crossing Asteroid

K09L00B C2009 06 01.92390 16 35 36.13 -01 41 17.9 18.9 R J95

 

K09L00D C2009 06 04.06613 17 42 36.33 +34 26 03.4 J95 = Aten

K09L00D C2009 06 04.07050 17 42 33.28 +34 25 59.9 J95

K09L00D C2009 06 04.07484 17 42 30.38 +34 25 56.6 20.5 R J95

 

K09L00E C2009 06 04.08055 17 59 35.95 +30 54 15.7 J95 = Apollo

K09L00E C2009 06 04.08456 17 59 36.49 +30 53 50.0 J95

K09L00E C2009 06 04.09000 17 59 37.19 +30 53 15.0 19.5 R J95

K09L00E C2009 06 08.00928 18 16 00.29 +18 54 31.9 J95

K09L00E C2009 06 08.01236 18 16 01.24 +18 53 34.7 J95

K09L00E C2009 06 08.01549 18 16 02.18 +18 52 36.9 J95

K09L00E C2009 06 08.02798 18 16 06.13 +18 48 46.3 18.0 R J95

 

K09L00Q C2009 06 11.92622 15 57 42.17 +09 16 13.3 J95 = Apollo

K09L00Q C2009 06 11.93661 15 57 36.87 +09 17 12.5 J95

K09L00Q C2009 06 11.94195 15 57 34.14 +09 17 42.3 18.8 R J95

K09L00Q C2009 06 17.91685 14 41 23.76 +22 12 16.7 J95

K09L00Q C2009 06 17.92008 14 41 19.99 +22 12 48.8 J95

K09L00Q C2009 06 17.92325 14 41 16.27 +22 13 20.2 18.3 R J95

K09L00Q C2009 06 18.92111 14 20 39.83 +25 03 18.8 J95

K09L00Q C2009 06 18.92311 14 20 37.17 +25 03 39.4 J95

K09L00Q C2009 06 18.92522 14 20 34.26 +25 04 00.9 18.6 R J95

K09L00Q C2009 06 20.96494 13 28 08.72 +30 55 49.1 J95

K09L00Q C2009 06 20.96627 13 28 06.37 +30 56 02.7 J95

K09L00Q C2009 06 20.96767 13 28 03.85 +30 56 16.2 19.2 R J95

 

K09L00S C2009 06 16.00824 16 59 55.95 -01 34 18.4 J95 = Apollo

K09L00S C2009 06 16.01249 16 59 55.18 -01 34 06.6 J95

K09L00S C2009 06 16.01678 16 59 54.44 -01 33 54.9 J95

K09L00S C2009 06 16.02015 16 59 53.83 -01 33 46.0 18.5 R J95

K09L00S C2009 06 16.93528 16 57 15.83 -00 52 27.9 J95

K09L00S C2009 06 16.93943 16 57 15.11 -00 52 17.0 J95

K09L00S C2009 06 16.94358 16 57 14.36 -00 52 05.7 18.7 R J95

 

K09L02V C2009 06 15.98163 16 45 46.59 +25 30 25.9 J95 = 9L9F4AF = Apollo

K09L02V C2009 06 15.98954 16 45 43.38 +25 32 09.7 J95

K09L02V C2009 06 15.99969 16 45 39.35 +25 34 20.9 20.6 R J95

K09L02V C2009 06 16.94841 16 39 18.21 +29 00 36.6 J95

K09L02V C2009 06 16.95073 16 39 17.14 +29 01 07.2 J95

K09L02V C2009 06 16.95486 16 39 15.30 +29 02 00.2 20.3 R J95

K09L02V C2009 06 18.99667 16 23 44.35 +36 25 15.4 J95

K09L02V C2009 06 19.00533 16 23 40.04 +36 27 06.4 J95

K09L02V C2009 06 19.01074 16 23 37.18 +36 28 16.5 20.6 R J95

 

K09M00A C2009 06 16.91199 17 28 07.46 +10 19 12.6 J95 = 9M9FBAF = Amor

K09M00A C2009 06 16.91702 17 28 07.43 +10 18 57.6 J95

K09M00A C2009 06 16.92074 17 28 07.38 +10 18 44.0 19.1 R J95

K09M00A C2009 06 17.95219 17 28 20.33 +09 19 50.7 J95

K09M00A C2009 06 17.95489 17 28 20.33 +09 19 40.9 J95

K09M00A C2009 06 17.95757 17 28 20.32 +09 19 31.1 18.6 R J95

K09M00A C2009 06 28.05769 17 33 21.45 -09 23 44.5 J95

K09M00A C2009 06 28.06001 17 33 21.55 -09 24 10.5 J95

K09M00A C2009 06 28.06196 17 33 21.62 -09 24 32.2 17.9 R J95

 

K09M00B C2009 06 17.93164 17 17 42.07 -04 56 55.2 J95 = 9MA02B8 = Mars-crossing Asteroid

K09M00B C2009 06 17.94372 17 17 41.20 -04 56 43.5 19.9 R J95

 

K09M00D C2009 06 18.06369 20 59 17.54 +09 07 12.6 J95 = 9MA032E = Amor

K09M00D C2009 06 18.07460 20 59 22.19 +09 06 37.5 20.5 R J95

 

K09M00O BC2009 06 19.08175 23 25 08.52 +10 04 33.2 J95 = 9MA0438 = MBA

K09M00O BC2009 06 19.08867 23 25 08.94 +10 04 34.1 19.8 R J95

 

K09M00S C2009 06 24.02988 17 29 21.15 +01 43 58.0 J95 = Apollo

K09M00S C2009 06 24.03593 17 29 20.62 +01 44 00.1 20.4 R J95

 

K09M00U C2009 06 21.92017 15 41 26.63 +09 55 04.5 J95 = 9M07B99 = Apollo

K09M00U C2009 06 21.92117 15 41 25.59 +09 55 18.7 J95

K09M00U C2009 06 21.92216 15 41 24.49 +09 55 31.6 J95

K09M00U C2009 06 21.92493 15 41 21.54 +09 56 08.5 17.7 R J95

K09M00U C2009 06 22.92795715 16 45.75 +15 30 50.1 17.2 R J95

K09M00U C2009 06 22.93003715 16 40.78 +15 31 50.5 17.0 R J95

K09M00U C2009 06 22.93242615 16 35.06 +15 33 00.0 17.1 R J95

K09M00U C2009 06 22.99060515 14 11.95 +16 01 56.0 17.2 R J95

K09M00U C2009 06 22.99270915 14 06.65 +16 03 00.1 16.8 R J95

K09M00U C2009 06 22.99682215 13 56.26 +16 05 06.0 16.7 R J95

K09M00U C2009 06 23.04567715 11 50.38 +16 30 33.3 16.8 R J95

K09M00U C2009 06 23.04813915 11 43.93 +16 31 52.0 17.1 R J95

K09M00U C2009 06 23.05250015 11 32.45 +16 34 11.6 16.8 R J95

K09M00U C2009 06 23.90154814 07 07.88 +28 40 56.0 16.6 R J95

K09M00U C2009 06 23.90413014 06 46.33 +28 44 09.1 17.2 R J95

K09M00U C2009 06 23.90613714 06 29.54 +28 46 40.0 16.6 R J95

K09M00U C2009 06 23.95757813 59 00.99 +29 52 10.7 16.2 R J95

K09M00U C2009 06 23.95881213 58 49.80 +29 53 46.5 16.1 R J95

K09M00U C2009 06 23.95998413 58 39.15 +29 55 17.5 16.1 R J95

K09M00U C2009 06 23.98925913 54 06.85 +30 33 35.5 16.4 R J95

K09M00U C2009 06 23.99056713 53 54.41 +30 35 19.1 16.5 R J95

K09M00U C2009 06 23.99187613 53 41.94 +30 37 02.6 16.9 R J95

K09M00U C2009 06 24.01785513 49 29.12 +31 11 38.5 16.4 R J95

K09M00U C2009 06 24.01976013 49 10.18 +31 14 12.1 16.7 R J95

K09M00U C2009 06 24.02481913 48 19.75 +31 21 00.2 17.5 R J95

 

K09M00X C2009 06 22.01273 16 29 53.56 +11 53 45.7 J95 = 9MA0B64 = Amor

K09M00X C2009 06 22.01661 16 29 53.42 +11 53 13.4 J95

K09M00X C2009 06 22.02127 16 29 53.42 +11 52 33.3 19.1 R J95

 

K09M06Z C2009 06 29.95515 20 03 59.45 -05 32 49.1 J95 = Amor

K09M06Z C2009 06 29.96847 20 04 00.83 -05 32 58.2 19.1 R J95

 

K09M07K C2009 06 28.06606 23 47 41.64 +35 15 54.5 J95 = 9M08B8B = Mars-crossing Asteroid

K09M07K C2009 06 28.06879 23 47 42.00 +35 15 59.3 J95

K09M07K C2009 06 28.07151 23 47 42.32 +35 16 04.3 19.8 R J95

 

K09M07J IC2009 06 28.07722 20 47 40.30 +06 37 52.5 J95 = 9MA324A = MBA

K09M07J IC2009 06 28.08583 20 47 40.07 +06 37 47.1 20.3 R J95

 

Dave Briggs, J69

 

COD J69

OBS David Briggs

MEA David Briggs

TEL 0.40-m f/4.57 Newtonian reflector + CCD

ACK MPCReport file updated 2009.08.18 00:16:09

AC2 dbriggs@kepler.demon.co.uk

NET NOMAD

G3697 C2009 08 17.91991 16 39 48.97 +31 45 49.5 16.0 C J69

G3697 C2009 08 17.92079 16 39 50.94 +31 45 47.8 16.2 C J69

G3697 C2009 08 17.92168 16 39 52.87 +31 45 46.3 16.0 C J69

G3697 C2009 08 17.92933 16 40 09.71 +31 45 31.5 16.2 C J69

G3697 C2009 08 17.93161 16 40 14.68 +31 45 27.5 16.0 C J69

L7390 C2009 08 17.99075 17 03 54.62 +23 33 19.1 15.6 C J69

L7390 C2009 08 17.99163 17 03 55.50 +23 33 00.3 15.5 C J69

L7390 C2009 08 18.00080 17 04 05.16 +23 29 49.0 15.7 C J69

L7390 C2009 08 18.00169 17 04 06.02 +23 29 30.6 15.8 C J69

L7390 C2009 08 18.00257 17 04 06.97 +23 29 11.8 15.8 C J69

----- end -----

 

COD J69

OBS David Briggs

MEA David Briggs

TEL 0.40-m f/4.57 Newtonian reflector + CCD

ACK MPCReport file updated 2009.08.25 00:09:01

AC2 dbriggs@kepler.demon.co.uk

NET CMC-14

K09Q09J C2009 08 24.93591 20 22 27.15 +12 55 40.8 16.3 C J69

K09Q09J C2009 08 24.93796 20 22 27.66 +12 55 27.1 16.2 C J69

K09Q09K C2009 08 24.94830 21 58 08.74 +17 38 04.4 17.3 C J69

K09Q09K C2009 08 24.95022 21 58 09.88 +17 38 02.9 17.6 C J69

K09Q09K C2009 08 24.95214 21 58 11.03 +17 38 02.5 17.7 C J69

----- end -----

 

COD J69

OBS David Briggs

MEA David Briggs

TEL 0.40-m f/4.57 Newtonian reflector + CCD

ACK MPCReport file updated 2009.08.29 02:16:12

AC2 dbriggs@kepler.demon.co.uk

NET CMC-14

9Q18D04 C2009 08 28.88475 21 08 08.20 +06 48 21.4 16.4 C J69

9Q18D04 C2009 08 28.88564 21 08 11.01 +06 48 34.8 16.8 C J69

9Q18D04 C2009 08 28.88652 21 08 13.83 +06 48 48.6 16.8 C J69

9Q18D04 C2009 08 28.88740 21 08 16.60 +06 49 01.9 17.5 C J69

9Q18D04 C2009 08 28.88829 21 08 19.44 +06 49 15.4 18.3 C J69

----- end -----

 

COD J69

OBS David Briggs

MEA David Briggs

TEL 0.40-m f/4.57 Newtonian reflector + CCD

ACK MPCReport file updated 2009.08.29 02:16:12

AC2 dbriggs@kepler.demon.co.uk

NET CMC-14

K09Q09K C2009 08 28.93660 00 11 20.06 +12 52 41.0 16.7 C J69

K09Q09K C2009 08 28.93679 00 11 21.25 +12 52 37.6 16.9 C J69

K09Q09K C2009 08 28.93698 00 11 22.24 +12 52 34.8 16.9 C J69

K09Q09K C2009 08 28.93718 00 11 23.24 +12 52 31.9 16.4 C J69

K09Q09K C2009 08 28.93736 00 11 24.27 +12 52 28.3 16.2 C J69

----- end -----

 

Alan Cahill, J94

 

COD J94

OBS A.E. Cahill

MEA A.E. Cahill

TEL 0.3-m f/4.0 Schmidt-Cassegrain + CCD

ACK MPCReport file updated 2009.07.29 23:15:00

AC2 alancahill@blueyonder.co.uk

NET USNO-B1.0

31650 C2009 07 29.93275 20 02 22.32 +01 19 31.7 16.6 C

J94

31650 C2009 07 29.94063 20 02 21.99 +01 19 28.7 16.5 C

J94

31650 C2009 07 29.95373 20 02 21.32 +01 19 23.5 16.5 C

J94

51637 C2009 07 29.92655 20 02 11.51 +02 03 32.4 16.9 C

J94

51637 C2009 07 29.93865 20 02 10.91 +02 03 32.9 16.8 C

J94

51637 C2009 07 29.94958 20 02 10.28 +02 03 32.7 16.7 C

J94

----- end -----

 

COD J94

OBS A.E. Cahill

MEA A.E. Cahill

TEL 0.3-m f/4.0 Schmidt-Cassegrain + CCD

ACK MPCReport file updated 2009.08.17 23:12:30

AC2 alancahill@blueyonder.co.uk

NET USNO-B1.0

38516 C2009 08 17.90825 21 55 09.64 +10 44 37.3 15.4 C J94

38516 C2009 08 17.92133 21 55 09.08 +10 44 31.8 15.0 C J94

38516 C2009 08 17.93750 21 55 08.40 +10 44 25.0 14.9 C J94

A9414 C2009 08 17.89978 21 48 57.53 +10 26 37.9 16.3 C J94

A9414 C2009 08 17.91597 21 48 56.57 +10 26 40.3 16.5 C J94

A9414 C2009 08 17.93277 21 48 55.58 +10 26 42.6 16.3 C J94

----- end -----

 

John Fletcher, J93

 

433 Eros Unusual

17274 NEO. 0.2AU 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 2009.08.02 00:02:16

AC2 jfmto@blueyonder.co.uk

NET CMC-14

00433 C2009 08 01.98208 23 05 36.74 +03 48 37.1 12.4 V

J93

00433 C2009 08 01.98597 23 05 36.54 +03 48 39.0 12.3 V

J93

00433 C2009 08 01.98986 23 05 36.35 +03 48 40.8 12.4 V

J93

17274 C2009 08 01.99683 20 19 22.20 -18 11 22.3 14.2 V

J93

17274 C2009 08 01.99877 20 19 22.38 -18 11 17.4 14.2 V

J93

17274 C2009 08 02.00072 20 19 22.54 -18 11 13.3 14.2 V

J93

----- end -----

 

Eros 433 Unusual

17274 NEO 0.1au 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 2009.08.15 22:55:13

AC2 jfmto@blueyonder.co.uk

NET CMC-14

00433 C2009 08 15.92914 22 49 19.03 +05 25 23.8 12.0 V J93

00433 C2009 08 15.93140 22 49 18.83 +05 25 24.3 12.0 V J93

00433 C2009 08 15.93366 22 49 18.64 +05 25 25.3 12.0 V J93

17274 C2009 08 15.93793 20 47 37.15 -08 23 10.2 14.2 V J93

17274 C2009 08 15.93951 20 47 37.34 -08 23 06.0 14.2 V J93

17274 C2009 08 15.94111 20 47 37.53 -08 23 01.9 14.2 V J93

----- end -----

 

Eros 433 Unusual

17274 NEO 0.1au 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 2009.08.17 23:26:50

AC2 jfmto@blueyonder.co.uk

NET CMC-14

00433 C2009 08 17.94976 22 46 14.33 +05 35 09.9 11.7 V J93

00433 C2009 08 17.95198 22 46 14.11 +05 35 10.6 11.7 V J93

00433 C2009 08 17.95421 22 46 13.90 +05 35 10.9 11.7 V J93

17274 C2009 08 17.95840 20 52 10.80 -06 54 55.9 14.2 V J93

17274 C2009 08 17.96065 20 52 11.11 -06 54 50.5 14.2 V J93

17274 C2009 08 17.96291 20 52 11.38 -06 54 45.0 14.3 V J93

----- end -----

 

Eros 433 Unusual

17274 Near Earth Asteroid.

 

COD J93

OBS John Fletcher

MEA John Fletcher

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

ACK MPCReport file updated 2009.08.20 23:40:56

AC2 jfmto@blueyonder.co.uk

NET CMC-14

00433 C2009 08 20.95238 22 41 23.23 +05 47 23.1 11.7 V J93

00433 C2009 08 20.95458 22 41 23.01 +05 47 23.7 11.8 V J93

00433 C2009 08 20.95677 22 41 22.80 +05 47 24.1 11.8 V J93

17274 C2009 08 20.96822 20 59 08.78 -04 45 35.6 14.5 V J93

17274 C2009 08 20.97045 20 59 09.09 -04 45 29.8 14.5 V J93

17274 C2009 08 20.97269 20 59 09.37 -04 45 24.3 14.5 V J93

----- end -----

 

Eros 433 Unusual

17274 Near Earth Asteroid.

 

COD J93

OBS John Fletcher

MEA John Fletcher

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

ACK MPCReport file updated 2009.08.20 23:40:56

AC2 jfmto@blueyonder.co.uk

NET CMC-14

00433 C2009 08 20.95238 22 41 23.23 +05 47 23.1 11.7 V J93

00433 C2009 08 20.95458 22 41 23.01 +05 47 23.7 11.8 V J93

00433 C2009 08 20.95677 22 41 22.80 +05 47 24.1 11.8 V J93

17274 C2009 08 20.96822 20 59 08.78 -04 45 35.6 14.5 V J93

17274 C2009 08 20.97045 20 59 09.09 -04 45 29.8 14.5 V J93

17274 C2009 08 20.97269 20 59 09.37 -04 45 24.3 14.5 V J93

----- end -----

 

Eros 433 Unusual

17274 Near Earth Asteroid.

  

COD J93

OBS John Fletcher

MEA John Fletcher

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

ACK MPCReport file updated 2009.08.21 22:04:46

AC2 jfmto@blueyonder.co.uk

NET CMC-14

00433 C2009 08 21.88554 22 39 49.35 +05 50 36.5 11.7 V J93

00433 C2009 08 21.88778 22 39 49.10 +05 50 36.9 11.6 V J93

00433 C2009 08 21.89001 22 39 48.88 +05 50 37.2 11.6 V J93

17274 C2009 08 21.89662 21 01 20.71 -04 06 27.6 14.4 V J93

17274 C2009 08 21.89818 21 01 20.94 -04 06 23.5 14.3 V J93

17274 C2009 08 21.89975 21 01 21.16 -04 06 19.7 14.3 V J93

----- end -----

 

Richard Miles, E10

 

COD F65

OBS R. Miles

MEA R. Miles

TEL 2.0-m f/10.0 Ritchey-Chretien + CCD

ACK MPCReport file updated 2009.07.14 20:34:17

AC2 rmiles@baa.u-net.com

NET NOMAD

K09N00L C2009 07 14.50327 22 51 09.15 +31 08 40.9 17.1 R

F65

K09N00L C2009 07 14.50475 22 51 08.96 +31 08 23.4 17.1 R

F65

K09N00L C2009 07 14.50773 22 51 08.57 +31 07 46.8 17.2 R

F65

K09N00L C2009 07 14.50851 22 51 08.48 +31 07 37.5 17.3 R

F65

K09N00L C2009 07 14.51229 22 51 07.96 +31 06 52.0 17.4 R

F65

K09N00L C2009 07 14.51321 22 51 07.83 +31 06 40.7 17.4 R

F65

K09N00L C2009 07 14.51833 22 51 07.17 +31 05 38.0 17.3 R

F65

----- end -----

 

COD E10

OBS R. Miles

MEA R. Miles

TEL 2.0-m f/10.0 Ritchey-Chretien + CCD

ACK MPCReport file updated 2009.07.17 14:00:49

AC2 rmiles@baa.u-net.com

NET CMC-14

97GC002 C2009 07 17.55699520 32 47.71 +05 46 15.5 18.0 R

E10

97GC002 C2009 07 17.55813120 32 47.87 +05 46 16.3 17.9 R

E10

97GC002 C2009 07 17.55921020 32 48.01 +05 46 17.1 17.8 R

E10

97GC002 C2009 07 17.56060020 32 48.21 +05 46 18.2 17.9 R

E10

AST388 C2009 07 17.54955018 03 12.90 -24 20 48.8 19.4 R

E10

AST388 C2009 07 17.55080018 03 12.79 -24 20 49.6 19.3 R

E10

AST388 C2009 07 17.55201318 03 12.71 -24 20 49.9 19.4 R

E10

AST388 C2009 07 17.55323218 03 12.59 -24 20 50.4 19.1 R

E10

----- end -----

 

COD E10

OBS R. Miles

MEA R. Miles

TEL 2.0-m f/10.0 Ritchey-Chretien + CCD

ACK MPCReport file updated 2009.08.26 13:41:02

AC2 rmiles@baa.u-net.com

NET NOMAD

9Q15126 C2009 08 26.53771 23 55 08.58 -17 05 16.5 19.5 R

E10

9Q15126 C2009 08 26.54014 23 55 08.53 -17 05 18.9 19.4 R

E10

9Q15BC8 C2009 08 26.52297 22 49 47.21 -07 03 54.4 19.3 R

E10

9Q15BC8 C2009 08 26.52394 22 49 46.99 -07 03 53.0 19.4 R

E10

9Q15BC8 C2009 08 26.52488 22 49 46.77 -07 03 51.6 19.3 R

E10

----- end -----

 

Photometry

 

Peter Birtwhistle

 

The Apollo 2001 FE90 was also observed towards the end of the month. Discovered in 2001 when it reached 18th magnitude, this year it was predicted to brighten to mag. +13.3 as it sped from north to south in the evening sky and was scheduled to be a RADAR target at Goldstone and Arecibo at the end of June. I first observed it briefly following a thunderstorm just after midnight on 26th June and in the 22 minutes before it was obscured behind trees it showed a dramatic variation of over two magnitudes in brightness! I observed it on the three following nights and watched the amplitude reduce to 1 magnitude as the phase angle reduced from 79 to 34.

The lightcurve derived from about 30 minutes of images taken on the evening of 27 June 2009 is shown, including a mosaic of the images from the same sessions, showing the rise and fall in brightness of the Minor Planet as it trailed (from left to right). As can be seen, the observations cover just a couple of minutes less than one full rotation period.

 

Richard Miles

 

Email dated 2009 July 14.

 

Dear FT Team,

 

Please find attached a copy of the composite rotational lightcurve of the

small near-Earth asteroid, 2009 LE, which I've produced based on images

taken during 15 sessions on the FTN by 6 sets of observers, namely myself

plus the Kingsley School, Paulet High School, the Thomas Aveling School,

TU-Darmstadt and Simon Langton Grammar following an observing alert sent out

on June 10 courtesy of Alison.

 

The bottom line is that this object has a probable rotation period of 14.64

hours, which makes it the SLOWEST known rotator for objects around this size

range or smaller. It rotates more than 1,000 times more slowly than last

year's record breaker, 2008 HJ.

 

We were lucky weatherwise in that there were four consecutive clear nights

on Maui, which enabled the rotation rate to be tied down fairly accurately.

However, the photometric analysis was a major undertaking and was made

possible by my using one extra observing session (this time on the Faulkes

Telescope South) on June 23 to image 11 fields which the asteroid passed

through during the various observing runs of June 12. Since the asteroid

was at a declination of -34 to -36 deg, it was possible to calibrate the

stars along the path of the object when they were high in the sky near the

zenith as seen from Siding Spring. In this way, using the other scope in

the southern hemisphere really helped bigtime especially since the object

had been moving at about 52 arcsec/min and so covered about 3 degrees of sky

in just a few hours on June 12. I should add that I took advantage of a

methodology developed by Brian Warner which enables the brightness and

colors of ensembles of stars to be determined with fair accuracy (+/-0.02

mag) by using the J and J-K data amassed by the 2MASS survey; probably the

most useful homogeneous 'all-sky' source of photometric data which exists.

 

Not a bad result considering the object is only about 70 meters across and

was almost 10 times the distance of the Moon from the Earth during most of

the observing runs. On June 9-10 it was also only about 20-30 degrees away

from a 93-97% illuminated Moon in the sky, which made life difficult. [In

future, when dogged by a nearby bright Moon, it will be better to image

through the Pan-STARR-Z filter to cut down the brightness of the sky

background.] Finally, I shall report some more astrometry for the June

10-12 period in due course.

 

Richard Miles

 

 

Index to observations received from ARPS members

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