Last updated 22 Aug 2021

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Lightcurve Photometry

The minor planets targeted during routine follow-up of newly discovered Near-Earth Objects at Great Shefford are mostly faint, many being too faint to be visible on single images and are only revealed by adding (stacking) many images together -  see here. However, a few are bright enough that individual exposures can provide accurate brightness measurements and therefore, if a series of exposures are taken, the brightness variations over a period of time can be measured and used to determine how fast the minor planet is rotating and the amplitude of the variations. Many Near-Earth objects are very small, some only tens of metres in diameter or smaller and often are rotating very fast. 

Listed below are light curves produced from measurements of images taken at Great Shefford and many published in the Minor Planet Bulletin, the Bulletin of the Minor Planets Section of The Association Of Lunar And Planetary Observers (ALPO). A Minor Planet Center table relating absolute magnitude (H) to size is available (see link in 'H' heading below).

Name Lightcurve Observed Rot. Period Ampl. H Publication
143651 (2003 QO104) 2009 Apr 22 - 2009 May 22 113.3 h 1.4 16.0 MPB Vol 36, No 4, p. 186-187
2000 RE52 = 2010 EK2 2010 Mar 4.9 h 0.9 22.3 MPB Vol 45, No 2, p. 178-181
2008 YZ32 2010 Jan 5.8 min 0.4 20.1 MPB Vol 45, No 2, p. 178-181
2009 EW 2009 Mar 3.8 min 1.5 26.4 MPB Vol 38, No 1, p. 36-39
2009 FH 2009 Mar 17 6.4 min 0.3 26.6 MPB Vol 36, No 4, p. 186-187
2009 HM82 2009 May 2-4 7.6 min 0.9 22.6 MPB Vol 36, No 4, p. 186-187
2009 KW2 2009 May 24-25 3.4 min 0.7 26.6 MPB Vol 36, No 4, p. 186-187
2009 KL8 2009 May 31 2.7 min 0.8 24.3 MPB Vol 36, No 4, p. 186-187
2009 QH34 2009 Aug 2.1 min 0.5 24.9 MPB Vol 38, No 1, p. 36-39
2009 UD 2009 Oct 1.4 min 0.7 27.2 MPB Vol 38, No 1, p. 36-39
2009 WV51 2009 Nov 4.6 min 0.9 27.1 MPB Vol 38, No 1, p. 36-39
2010 EX11 2010 Mar 2.7 min 0.3 24.1 MPB Vol 38, No 1, p. 36-39
2010 GF7 2010 Apr 1.9 min 0.8 25.9 MPB Vol 38, No 1, p. 36-39
2010 TG19 2010 Oct 1.2 min 1.1 23.9 MPB Vol 38, No 2, p. 104-107
2010 UJ7 2010 Nov 3.2 min 0.9 25.4 MPB Vol 38, No 2, p. 104-107
2010 VK139 2010 Nov 1.8 min 0.5 23.7 MPB Vol 38, No 2, p. 104-107
2010 XE11 2010 Dec 1.6 min 0.5 23.0 MPB Vol 38, No 2, p. 104-107
2010 XM56 2010 Dec 2.35 h 4.4 25.1 MPB Vol 38, No 2, p. 104-107
2012 XE54
2012 Dec 1.7 min 0.3 25.4 MPB Vol 45, No 3, p. 215-219
2016 VA
2016 Nov - - 27.6 MPB Vol 45, No 3, p. 215-219
2017 UK8 2017 Oct 31 sec 1.3 28.2 MPB Vol 45, No 2, p. 178-181
2017 VD 2017 Nov 8.0 h 0.9 20.8 MPB Vol 45, No 2, p. 178-181
2018 CB 2018 Feb 5.4 min 0.2+ 25.9 MPB Vol 48, No 1, p. 26-29 (link to full MPB issue)
2018 GE3 2018 Apr 18.2 min 0.9 23.8 MPB Vol 48, No 1, p. 26-29 (link to full MPB issue)
2018 KF1 2018 May 1.9 min 1.3 25.8 MPB Vol 48, No 2, p. 180-186 (link to full MPB issue)
2020 GF2 2020 Apr 1.1 min 0.8 26.0 MPB Vol 48, No 2, p. 180-186 (link to full MPB issue)
2020 KK7 2020 May - Jun 46 sec 1.4 26.3 MPB Vol 48, No 1, p. 26-29 (link to full MPB issue)
2020 OH3 2020 Jul 23.5 min 1.0 24.6 MPB Vol 48, No 2, p. 180-186 (link to full MPB issue)
2020 RA6 2020 Sep 20.5 min 2.1 26.0 MPB Vol 48, No 2, p. 180-186 (link to full MPB issue)
2020 RZ6 2020 Sep 32 sec 1.2 26.5 MPB Vol 48, No 2, p. 180-186 (link to full MPB issue)
2020 SW 2020 Sep 28 sec 0.7 29.1 MPB Vol 48, No 1, p. 26-29 (link to full MPB issue)
2020 TP1 2020 Oct 25 min 0.8 26.8 MPB Vol 48, No 2, p. 180-186 (link to full MPB issue)
2020 TD8 2020 Oct 30 sec 0.9 26.9 MPB Vol 48, No 2, p. 180-186 (link to full MPB issue)
2020 TB12 2021 Feb 38 min 2.2 22.2 MPB Vol 48, No 3, p. 286-293 (link to full MPB issue)
2020 UQ6 2020 Oct 2.7 min 0.7 22.6 MPB Vol 48, No 2, p. 180-186 (link to full MPB issue)
2020 VZ6 2020 Dec 5.9 min 0.8 25.1 MPB Vol 48, No 2, p. 180-186 (link to full MPB issue)
2020 XX3 2020 Dec 2.3 min 1.0 28.5 MPB Vol 48, No 2, p. 180-186 (link to full MPB issue)
2020 YE5 2021 Jan 1.1 h 0.1 25.8 MPB Vol 48, No 3, p. 286-293 (link to full MPB issue)
2021 AU 2021 Jan 1.6 h 0.5 24.4 MPB Vol 48, No 3, p. 286-293 (link to full MPB issue)
2021 CO 2021 Feb 1.6 h 0.3 25.3 MPB Vol 48, No 3, p. 286-293 (link to full MPB issue)
2021 DP 2021 Feb 6.8 min (P1) 0.8 26.6 MPB Vol 48, No 3, p. 286-293 (link to full MPB issue)
2021 DP 2021 Feb 7.7 min (P2) 0.6 26.6 MPB Vol 48, No 3, p. 286-293 (link to full MPB issue)
2021 DX1 2021 Feb 1.8 h (P1) 1.1 23.0 MPB Vol 48, No 3, p. 286-293 (link to full MPB issue)
2021 DX1 2021 Feb 1.2 h (P2) 0.5 23.0 MPB Vol 48, No 3, p. 286-293 (link to full MPB issue)
2021 EB1 2021 Mar 3.6 min 0.7 23.5 MPB Vol 48, No 3, p. 286-293 (link to full MPB issue)
2021 EX1 2021 Mar 6.8 min 0.3 24.9 MPB Vol 48, No 3, p. 286-293 (link to full MPB issue)
2021 FH 2021 Mar 1.1 min 0.2 26.7 MPB Vol 48, No 3, p. 286-293 (link to full MPB issue)
2015 HO116 2015 Apr 1.5 h 1.8 25.5 (submitted to the MPB)
2021 GQ10 2021 Apr 19.3 sec 0.1 26.7 (submitted to the MPB)
2021 GG11 2021 Apr 2.6 min 0.8 23.1 (submitted to the MPB)
2021 HN 2021 Apr 15.7 sec 0.7 26.9 (submitted to the MPB)
2021 HC3 2021 May 2.3 min 1.0 21.6 (submitted to the MPB)
2021 JR3 2021 May 6.2 min 0.7 25.0 (submitted to the MPB)
2021 JB6 2021 May 1.1 min 0.5 28.9 (submitted to the MPB)
2021 KN2 2021 May 1.3 min (P1) 0.5 28.6 (submitted to the MPB)
2021 KN2 2021 May 1.1 min (P2) 0.4 28.6 (submitted to the MPB)
2021 KN2 2021 May 45 sec (P3) 0.3 28.6 (submitted to the MPB)
2020 SO = 1966-084B?

1966 Surveyor 2 Centaur rocket body?

2020 Dec 9.4 sec 3.1   Minor Planet Mailing List #36025
2010-050B

Chang'e 2 rocket body

2010 Nov 26.9 sec 3.3   Minor Planet Mailing List #33260
2020-052B

Mars 2020 Atlas 5 Centaur rocket body

2020 Jul 28.6 sec 2.2   Minor Planet Mailing List #35725

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