2000 QL251

System parameters

Heliocentric orbitPhotometry Position 2022/03/21 22:19 UTC
DES class = 2:1E HV = 7.15±0.02 +01:22:40.59 +10:01:20.8
<a> = 47.80 (AU) V = 23.3 (V2 = 24.1) Uncertainty = 0.5 (arcsec)
<e> = 0.208 Δmag = 0.12 Rates: +3.684, +1.364 ("/hr)
<i> = 5.84 (degrees) B-V = NULL  
Perihelion = 1985 V-R = 0.56±0.06 Opposition: October
Aphelion = 2152    

Astrometric observations

Observation time (UTC)Observatory/InstrumentRADEC Δ (AU)Δx (arcsec) Δx errorΔy (arcsec) Δy error
2006/07/25  10.76904 HST/ACS-HRC +23:58:53.16 +02:41:36.2 38.27495 -0.24089 0.00045 -0.10082 0.00050
2007/07/15  22.75167 HST/WFPC2-PC +00:05:06.20 +03:16:21.9 38.57595 -0.10209 0.00286 -0.16995 0.00124
2007/07/19  09.81000 HST/WFPC2-PC +00:05:02.00 +03:16:05.4 38.52329 -0.05006 0.00118 -0.15815 0.00219
2007/08/05  11.76833 HST/WFPC2-PC +00:04:26.68 +03:13:03.7 38.28726 -0.02229 0.00264 +0.08140 0.00189
2007/08/27  17.94055 HST/WFPC2-PC +00:03:09.83 +03:05:25.3 38.06382 -0.23335 0.00194 -0.12592 0.00176
2008/08/25  08.60611 HST/WFPC2-PC +00:09:23.20 +03:40:34.8 38.22113 +0.07422 0.00133 -0.06801 0.00148
2009/12/19  12.19194 HST/WFC3-UVIS +00:09:13.35 +03:29:39.2 39.15379 -0.23546 0.00200 -0.10908 0.00319
2012/09/29  10.00028 Gemini/NIRI +00:31:10.56 +05:39:53.9 38.63891 -0.24370 0.02000 -0.10323 0.02000
2015/07/31  14.82767 Keck/NIRC2 +00:52:21.86 +07:36:30.1 39.65896 -0.03923 0.00798 -0.15133 0.00409
2017/08/08  14.31000 Keck/NIRC2 +01:03:42.33 +08:35:46.1 39.90128 +0.04251 0.00450 -0.11296 0.00563

Orbital knowledge

Comments: Orbit published here, and updated here.
Parameter Value Units
P period56.449±0.004days
a semimajor axis4990±20kilometers
e eccentricity0.489±0.004dimensionless
i inclination127.7±0.6degrees
ε mean longitude at epoch145±1degrees
Ω longitude of ascending node109.2±0.8degrees
ϖ longitude of periapsis151.7±0.9degrees

Angles are referenced to J2000 equatorial coordinates.

Epoch = Julian date 2454200.0

2022/03/21 22:19


Last updated: 2022/03/21 22:19 UTC