Last updated 18 Dec 2023

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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 with many being published in the Minor Planet Bulletin (MPB), the Bulletin of the Minor Planets Section of The Association Of Lunar And Planetary Observers (ALPO). Please use the links to the MPB for more detailed light curve information and analysis. Please note individual MPB issues can be downloads of 5 - 50 Mb.

A Minor Planet Center table relating absolute magnitude (H) to size is available here.

Cross reference of minor planet identifiers
  Numbered
  143651 (2003 QO104) 614316 (2008 YZ32)
Year Provisional IDs
2003 2003 EM1 2003 QO104 (143651)
2008 2008 EZ7 2008 YZ32 (614316)
2009 2009 DO111 2009 EW 2009 FH 2009 HM82 2009 KW2 2009 KL8 2009 QH34 2009 UD 2009 WV25 2009 WV51
2010 2010 EX11 2010 GF7 2010 TG19 2010 UJ7 2010 VK139 2010 XE11 2010 XM56
2011 2011 EY11 2011 MD 2011 PE2
2012 2012 FP35 2012 TV 2012 XE54
2015 2015 HO116
2016 2016 GP221 2016 VA
2017 2017 OM1 2017 TE5 2017 UK8 2017 VD 2017 WD28
2018 2018 CB 2018 GE3 2018 KF1 2018 SM1 2018 ST1
2019 2019 UM12
2020 2020 GF2 2020 KK7 2020 OH3 2020 RA6 2020 RZ6 2020 SW 2020 TP1 2020 TD8 2020 TB12 2020 UQ6 2020 VZ6 2020 XX3 2020 YE5
2021 2021 AU 2021 CO 2021 DP 2021 DW1 2021 DX1 2021 EB1 2021 EX1 2021 FH 2021 GQ10 2021 GG11 2021 HN 2021 HC3 2021 JR3 2021 JB6 2021 KN2 2021 LC1 2021 LO2 2021 QB3 2021 RA 2021 RB1 2021 RS2 2021 RG19 2021 TT10 2021 US1 2021 UW1 2021 VL3 2021 VQ26
2022 2022 AO6 2022 CV5 2022 CO6 2022 DA 2022 ER5 2022 FC 2022 FD 2022 FB2 2022 FL4 2022 GY2 2022 HA 2022 HC 2022 JL 2022 KK5 2022 MP 2022 MN1 2022 NE 2022 NR 2022 QC 2022 QV 2022 QX4 2022 QT7 2022 SG3 2022 SW3 2022 TG 2022 TG1 2022 VL1 2022 WG5
2023 2023 AQ 2023 BU 2023 HK 2023 HU4 2023 HO18 2023 KZ1 2023 QC 2023 RP2 2023 RG13 2023 TC 2023 TM3 2023 TC7 2023 VB2 2023 WA
Jump to Artificial satellite light curves
Light curve list
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
2009 FH 2009 Mar 17 6.4 min 0.3 26.6
2009 HM82 2009 May 2-4 7.6 min 0.9 22.6
2009 KW2 2009 May 24-25 3.4 min 0.7 26.6
2009 KL8 2009 May 31 2.7 min 0.8 24.3
2009 EW 2009 Mar 3.8 min 1.5 26.4 MPB Vol 38, No 1, p. 36-39
2009 QH34 2009 Aug 2.1 min 0.5 24.9
2009 UD 2009 Oct 1.4 min 0.7 27.2
2009 WV51 2009 Nov 4.6 min 0.9 27.1
2010 EX11 2010 Mar 2.7 min 0.3 24.1
2010 GF7 2010 Apr 1.9 min 0.8 25.9
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
2010 VK139 2010 Nov 1.8 min 0.5 23.7
2010 XE11 2010 Dec 1.6 min 0.5 23.0
2010 XM56 2010 Dec 2.35 h 4.4 25.1
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
2017 UK8 2017 Oct 31 sec 1.3 28.2
2017 VD 2017 Nov 8.0 h 0.9 20.8
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
2018 CB 2018 Feb 5.4 min 0.2+ 25.9 MPB Vol 48, No 1, p. 26-29
2018 GE3 2018 Apr 18.2 min 0.9 23.8
2020 KK7 2020 May - Jun 46 sec 1.4 26.3
2020 SW 2020 Sep 28 sec 0.7 29.1
2018 KF1 2018 May 1.9 min 1.3 25.8 MPB Vol 48, No 2, p. 180-186
2020 GF2 2020 Apr 1.1 min 0.8 26.0
2020 OH3 2020 Jul 23.5 min 1.0 24.6
2020 RA6 2020 Sep 20.5 min 2.1 26.0
2020 RZ6 2020 Sep 32 sec 1.2 26.5
2020 TP1 2020 Oct 25 min 0.8 26.8
2020 TD8 2020 Oct 30 sec 0.9 26.9
2020 UQ6 2020 Oct 2.7 min 0.7 22.6
2020 VZ6 2020 Dec 5.9 min 0.8 25.1
2020 XX3 2020 Dec 2.3 min 1.0 28.5
2020 TB12 2021 Feb 38 min 2.2 22.2 MPB Vol 48, No 3, p. 286-293
2020 YE5 2021 Jan 1.1 h 0.1 25.8
2021 AU 2021 Jan 1.6 h 0.5 24.4
2021 CO 2021 Feb 1.6 h 0.3 25.3
2021 DP 2021 Feb 6.8 min (P1) 0.8 26.6
2021 Feb 7.7 min (P2) 0.6
2021 DX1 2021 Feb 1.8 h (P1) 1.1 23.0
2021 Feb 1.2 h (P2) 0.5
2021 EB1 2021 Mar 3.6 min 0.7 23.5
2021 EX1 2021 Mar 6.8 min 0.3 24.9
2021 FH 2021 Mar 1.1 min 0.2 26.7
2021 DW1 2021 Mar 49.5 sec 0.2 25.0 arXiv:2109.11689 [astro-ph.EP] (see full reference)
2015 HO116 2015 Apr 1.5 h 1.8 25.5 MPB Vol 48, No 4, p. 341-345
2021 GQ10 2021 Apr 19.3 sec 0.1 26.7
2021 GG11 2021 Apr 2.6 min 0.8 23.1
2021 HN 2021 Apr 15.7 sec 0.7 26.9
2021 HC3 2021 May 2.3 min 1.0 21.6
2021 JR3 2021 May 6.2 min 0.7 25.0
2021 JB6 2021 May 1.1 min 0.5 28.9
2021 KN2 2021 May 1.3 min (P1) 0.5 28.6
2021 May 1.1 min (P2) 0.4
2021 May 45 sec (P3) 0.3
2021 LC1 2021 Jun 1.9 h 2.2 26.5 MPB Vol 49, No 2, p. 90-97
2021 QB3 2021 Sep 22 min (P1) 0.5 23.8
2021 Sep 19 min (P2) 0.1
2021 RA 2021 Sep 20 min 0.6 24.7
2021 RB1 2021 Sep 2.9 h 0.4 24.1
2021 RS2 2021 Sep 43 sec 0.8 30.4
2021 RG19 2021 Sep 1.9 min 0.8 24.7
2021 TT10 2021 Oct 2.2 min 0.2 23.4
2021 US1 2021 Nov 2.0 min 0.2 27.8
2021 UW1 2021 Oct 21 sec 1.2 26.2
2021 VL3 2021 Nov 5.4 min 0.4 28.4
2021 VQ26 2021 Nov 7.5 h 0.8 24.3
2022 AO6 2022 Jan 2.2 min 0.4 25.3 MPB Vol 49, No 3, p. 169-175
2022 CV5 2022 Feb 3.3 min (P1) 0.7 27.7
2022 Feb 2.5 min (P2) 0.3
2022 CO6 2022 Feb 2.8 min 0.3 26.0
2022 DA 2022 Feb - - 25.1
2022 ER5 2022 Mar 6.9 min 0.8 25.7
2022 FC 2022 Mar 1.8 min (P1) 0.9 26.1
2022 Mar 42 sec (P2) 0.3
2022 FD 2022 Mar 2.2 min 0.6 26.1
2022 FB2 2022 Mar 2.6 hrs 0.7 26.8
2022 FL4 2022 Mar 1.0 min 0.7 26.6
2022 GY2 2022 Apr 9.3 hrs 0.6 21.7 MPB Vol 49, No 4, p. 280-286
2022 HA 2022 Apr 19.0 min 1.3 24.4
2022 HC 2022 Apr 51 sec 0.3 25.1
2022 JL 2022 May 52 sec 0.3 23.4
2022 KK5 2022 May 5.0 min 1.0 25.1
2022 MP 2022 Jun 56 sec 0.8 24.0
2022 MN1 2022 Jun 54 sec 0.8 27.3
2022 NE 2022 Jul 56 sec (P1) 1.0 28.7 MPB Vol 50, No. 1, p. 26-33
2022 Jul 1.2 min (P2) 0.6
2022 NR 2022 Jul 4.1 min 0.4 25.9
2022 QC 2022 Aug 2.0 min 0.6 25.3
2022 QV 2022 Aug 3.7 min 0.5 25.9
2022 QX4 2022 Aug 5.3 min 0.3 24.7
2022 QT7 2022 Aug 5.6 min (P1) 0.9 28.6
2022 Aug 23 sec (P2) 1.0
2022 SG3 2022 Sep 9.6 min (P1) 0.8 27.1
2022 Sep 6.2 min (P2) 0.3
2022 SW3 2022 Sep 11.7 min 1.5 24.8
2003 EM1 2003 Mar 1.9 min 1.0 24.5 MPB Vol 50, No. 2, p. 131-142
2008 EZ7 2008 Mar 59 sec 0.4 27.0
2011 EY11 2011 Mar 1.0 min (P1) 0.7 28.5
2011 Mar 1.5 min (P2) 0.5
2011 MD 2011 Jun 11.6 min 0.7 28.0
2012 FP35 2012 Mar 18.3 min 0.3 27.9
2016 GP221 2016 Apr 54 sec 1.0 25.9
2017 TE5 2017 Oct 1.3 min 0.6 26.0
2018 SM1 2018 Sep 1.6 hrs 0.5 22.9
2018 ST1 2018 Sep 38.7 min (P1) 1.6 25.1
2018 Sep 28.3 min (P2) 0.8
2021 LO2 2021 Jun 41 sec (P1) 0.5 28.0
2021 Jun 1.0 min (P2) 0.4
2022 TG 2022 Oct 11.4 min 0.6 25.1
2022 TG1 2022 Oct 11.7 min (P1) 0.3 25.6
2022 Oct 7.9 min (P2) 0.2
2022 VL1 2022 Nov 1.8 min (P1) 0.8 26.8
2022 Nov 1.4 min (P2) 0.4
2022 WG5 2022 Nov 2.6 min 0.5 22.4
2023 AQ 2023 Jan 2.1 min 0.9 22.8 MPB Vol 50, No. 3, p. 202-205
2023 BU 2023 Jan 26.0 1.3 min (P1) 0.9 29.7
2023 Jan 26.0 47.5 sec (P2) 0.7
2023 Jan 26.9 1.3 min (P1) 1.0
2023 Jan 26.9 47.5 sec (P2) 0.3
2023 HK 2023 Apr 5.6 min (P1) 0.7 27.2 MPB Vol 50, No. 4, p. 295-300
4.3 min (P2) 0.7
2023 HU4 2023 Apr  8.6 min (P1) 1.0 26.8
53 min (P2) 0.5
2023 HO18 2023 Jun 6.0 min 0.6 25.5
2023 KZ1 2023 May 4.7 min 1.4 26.3
2009 WV25 2009 Nov 4.6 h 1.7 24.0 MPB Vol 51, No. 1, p. 66-71
2017 WD28 2017 Nov 5.7 min (P1) 1.0 25.7
4.3 min (P2) 0.3
2023 QC 2023 Aug 28.7 sec 0.6 24.7
2023 RP2 2023 Sep 1.0 min 0.7 27.2
2023 RG13 2023 Sep 16.0 min 1.1 24.4
2023 TC 2023 Oct 3.4 min (P1) 0.6 26.5
2.4 min (P2) 0.4
2009 DO111 2009 Mar 2.9 min 1.3 22.9

(pending acceptance in the Minor Planet Bulletin)

2011 PE2 2011 Aug 44.4 min 1.3 23.1
2012 TV 2012 Oct 3.2 min 0.7 25.2
2017 OM1 2017 Jul 3.5 min 0.3 23.4
2019 UM12 2019 Nov 20.3 min 0.5 24.7
2023 TM3 2023 Oct 2.3 min 0.5 26.9
2023 TC7 2023 Oct 12.7 sec 0.6 26.9
2023 VB2 2023 Nov 4.0 min 0.5 28.2
2023 WA 2023 Nov 1.1 min (P1) 0.9 28.5
48 sec (P2) 0.3
Artificial satellites:
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
2014-065B?

Chang'e 5-T1 rocket body?

2022 Jan 180.6 sec 2.0   Bill Gray's page

(collision with Moon 2022 Mar 04.5)

2016-038C

= NORAD 41590 = Falcon 9-026 Stage 2

2023 Sep 80.26 sec 1.1   Bill Gray's page

= NEOCP IDs A10WEWw, A10VAWp, A10VCAK, A10VCQd, A10VD63, A10VwJZ, C3QUCA1, C3R7A71, C3R7HJ1

2020-052B

Mars 2020 Atlas 5 Centaur rocket body

2020 Jul 28.6 sec 2.2   Minor Planet Mailing List #35725
2023-137E = NORAD 57804 = H-2A F47 Stage 2 (SLIM booster) 2023 Dec (possibly tumbling, or ~15.5 min period?)     Bill Gray's page

= NEOCP IDs C40WMQ1 = A10Y8MO = A10YNZf 

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