Last updated 17 Apr 2022

Home
What's New
Location
Equipment
Software
Methods
Results
Gallery
Links
Ephemerides
Moon etc
Meetings
Contact Us
Site Map

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 DW1 2021 Mar 49.5 sec 0.2 25.0 arXiv:2109.11689 [astro-ph.EP] (see full reference)
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 MPB Vol 48, No 4, p. 341-345 (link to full MPB issue)
2021 GQ10 2021 Apr 19.3 sec 0.1 26.7 MPB Vol 48, No 4, p. 346-352 (link to full MPB issue)
2021 GG11 2021 Apr 2.6 min 0.8 23.1 MPB Vol 48, No 4, p. 341-345 (link to full MPB issue)
2021 HN 2021 Apr 15.7 sec 0.7 26.9 MPB Vol 48, No 4, p. 346-352 (link to full MPB issue)
2021 HC3 2021 May 2.3 min 1.0 21.6 MPB Vol 48, No 4, p. 341-345 (link to full MPB issue)
2021 JR3 2021 May 6.2 min 0.7 25.0 MPB Vol 48, No 4, p. 341-345 (link to full MPB issue)
2021 JB6 2021 May 1.1 min 0.5 28.9 MPB Vol 48, No 4, p. 341-345 (link to full MPB issue)
2021 KN2 2021 May 1.3 min (P1) 0.5 28.6 MPB Vol 48, No 4, p. 341-345 (link to full MPB issue)
2021 KN2 2021 May 1.1 min (P2) 0.4 28.6 MPB Vol 48, No 4, p. 341-345 (link to full MPB issue)
2021 KN2 2021 May 45 sec (P3) 0.3 28.6 MPB Vol 48, No 4, p. 341-345 (link to full MPB issue)
2021 LC1 2021 Jun 1.9 h 2.2 26.5 MPB Vol 49, No 2, p. 90-97 (link to full MPB issue)
2021 QB3 2021 Sep 22 min (P1) 0.5 23.8 MPB Vol 49, No 2, p. 90-97 (link to full MPB issue)
2021 QB3 2021 Sep 19 min (P2) 0.1 23.8 MPB Vol 49, No 2, p. 90-97 (link to full MPB issue)
2021 RA 2021 Sep 20 min 0.6 24.7 MPB Vol 49, No 2, p. 90-97 (link to full MPB issue)
2021 RB1 2021 Sep 2.9 h 0.4 24.1 MPB Vol 49, No 2, p. 90-97 (link to full MPB issue)
2021 RS2 2021 Sep 43 sec 0.8 30.4 MPB Vol 49, No 2, p. 90-97 (link to full MPB issue)
2021 RG19 2021 Sep 1.9 min 0.8 24.7 MPB Vol 49, No 2, p. 90-97 (link to full MPB issue)
2021 TT10 2021 Oct 2.2 min 0.2 23.4 MPB Vol 49, No 2, p. 90-97 (link to full MPB issue)
2021 US1 2021 Nov 2.0 min 0.2 27.8 MPB Vol 49, No 2, p. 90-97 (link to full MPB issue)
2021 UW1 2021 Oct 21 sec 1.2 26.2 MPB Vol 49, No 2, p. 90-97 (link to full MPB issue)
2021 VL3 2021 Nov 5.4 min 0.4 28.4 MPB Vol 49, No 2, p. 90-97 (link to full MPB issue)
2021 VQ26 2021 Nov 7.5 h 0.8 24.3 MPB Vol 49, No 2, p. 90-97 (link to full MPB issue)
2022 AO6 2022 Jan 2.2 min 0.4 25.3 (pending acceptance to the Minor Planet Bulletin)
2022 CV5 2022 Feb 3.3 min (P1) 0.7 27.7 (pending acceptance to the Minor Planet Bulletin)
2022 CV5 2022 Feb 2.5 min (P2) 0.3 27.7 (pending acceptance to the Minor Planet Bulletin)
2022 CO6 2022 Feb 2.8 min 0.3 26.0 (pending acceptance to the Minor Planet Bulletin)
2022 DA 2022 Feb - - 25.1 (pending acceptance to the Minor Planet Bulletin)
2022 ER5 2022 Mar 6.9 min 0.8 25.7 (pending acceptance to the Minor Planet Bulletin)
2022 FC 2022 Mar 1.8 min (P1) 0.9 26.1 (pending acceptance to the Minor Planet Bulletin)
2022 FC 2022 Jan 42 sec (P2) 0.3 26.1 (pending acceptance to the Minor Planet Bulletin)
2022 FD 2022 Mar 2.2 min 0.6 26.1 (pending acceptance to the Minor Planet Bulletin)
2022 FB2 2022 Mar 2.6 hrs 0.7 26.8 (pending acceptance to the Minor Planet Bulletin)
2022 FL4 2022 Mar 1.0 min 0.7 26.6 (pending acceptance to the Minor Planet Bulletin)
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)
2020-052B

Mars 2020 Atlas 5 Centaur rocket body

 2020 Jul 28.6 sec 2.2   Minor Planet Mailing List #35725

Home Whats New Location Equipment Software Methods Results  
Gallery Links Ephemerides Moon Meetings Contact Us Site map

© Copyright 2003 - 2022 Peter Birtwhistle