Only seven observations over an arc of four weeks were published in the original discovery announcement (provisional designation: 2010 EK139), so the initial orbit was very uncertain. Fortunately, the TNO was quite bright and a match to a one-night discovery from 2005 was made. With a revised orbit, images from SkyMorph were found on three nights in 2002-2003.
The following astrometry was submitted to the Minor Planet Center:
K10ED9K C2002 03 15.47677 12 31 53.00 -20 26 46.2 19.7 R 644
K10ED9K C2002 03 15.48764 12 31 52.99 -20 26 45.6 19.8 R 644
K10ED9K C2002 03 15.49846 12 31 52.96 -20 26 45.8 19.8 R 644
K10ED9K C2002 04 08.31825 12 29 57.29 -20 18 53.7 19.9 R 644
K10ED9K C2002 04 08.35411 12 29 57.11 -20 18 52.3 20.0 R 644
K10ED9K C2002 04 08.38506 12 29 57.01 -20 18 51.9 19.9 R 644
K10ED9K C2003 03 23.31235 12 35 16.34 -21 30 05.9 19.9 R 644
K10ED9K C2003 03 23.33332 12 35 16.20 -21 30 05.5 20.2 R 644
K10ED9K C2003 03 23.35431 12 35 16.11 -21 30 05.1 19.5 R 644
At the end of this page are the elements and residuals before and with the new data. The new orbit is much more accurate because the object
has now been observed for eight years instead of four weeks. 2010 EK139 was numbered on 2016-07-19 and named later.
View the Discovery Announcement. See also MPEC 2010-G50.
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2003 March 23.33332 UTC (Middle Exposure) RA 12h35m16.20s Dec. -21°30'05.5" 3 x 60-second exposures Size = 150" x 150" |
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2002 April 8.35411 UTC (Middle Exposure) RA 12h29m57.11s Dec. -20°18'52.3" 3 x 60-second exposures Size = 150" x 150" |
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2002 March 15.48764 UTC (Middle Exposure) RA 12h31m52.99s Dec. -20°26'45.6" 3 x 60-second exposures Size = 150" x 150" |
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2010 EK139
Epoch 2010 Mar. 25.0 TT = JDT 2455280.5 MPC M 0.04068 (2000.0) P Q n 0.00337448 Peri. 219.30071 -0.83904880 +0.53899375 a 44.0215315 Node 352.16999 -0.24958312 -0.50226240 e 0.0812538 Incl. 32.92361 -0.48343084 -0.67617913 P 292 H 3.9 G 0.15 From 7 observations 2010 Mar. 13-Apr. 8. E-assumed.
2010 EK139
Epoch 2010 July 23.0 TT = JDT 2455400.5 MPC M 342.29936 (2000.0) P Q n 0.00170567 Peri. 284.84263 +0.04914832 +0.99192880 a 69.3753659 Node 346.26910 -0.61627661 -0.06197485 e 0.5321772 Incl. 29.50016 -0.78599465 +0.11061816 P 578 H 4.0 G 0.15 U 2 Residuals in seconds of arc K023F 644 0.5- 0.4- K033N 644 0.1- 0.0 K103D 304 0.0 0.0 K023F 644 0.1+ 0.1+ K033N 644 0.1+ 0.1+ K1045 304 0.3- 0.2- K023F 644 0.4+ 0.3- K055C 644 0.3+ 0.2+ K1045 304 0.1- 0.2- K0248 644 0.4- 0.2- K055C 644 0.3+ 0.0 K1048 E85 0.1- 0.1+ K0248 644 0.5- 0.3+ K055C 644 0.0 0.5+ K1048 E85 0.1+ 0.1+ K0248 644 0.3+ 0.0 K103D 304 0.1+ 0.1- K033N 644 0.4+ 0.0 K103D 304 0.1- 0.0
NEAT precovery images are from SkyMorph, which is a NASA Applied Information Systems Research (AISR) funded project.