55637 (2002 UX25)

System parameters

Heliocentric orbitPhotometry Position 2015/04/20 22:35 UT
DES class = SCATEXTD HV = 3.88±0.01 +02:34:30.95 +09:47:29.3
<a> = 42.73 (AU) V = 20.0 (V2 = 22.6) Uncertainty = 0.3 (arcsec)
<e> = 0.137 Δmag = 2.50 Rates: +3.937, +1.123 ("/hr)
<i> = 20.23 (degrees) B-V = 0.97±0.02  
Perihelion = 2066 V-R = 0.56±0.01 Opposition: November
Aphelion = 2205    

Astrometric observations

Observation time (UT)Observatory/InstrumentRADEC Δ (AU)Δx (arcsec) Δx errorΔy (arcsec) Δy error
2005/08/26  15.78192 HST/ACS-HRC +01:47:08.16 +10:01:17.9 41.70040 +0.07020 0.00030 -0.14600 0.00100
2006/07/22  19.24488 HST/ACS-HRC +01:52:53.21 +10:09:00.8 42.15196 +0.00000 0.05000 +0.00000 0.05000
2006/07/23  11.59728 HST/ACS-HRC +01:52:53.81 +10:08:59.6 42.14020 +0.02200 0.00100 -0.08500 0.00100
2006/07/27  13.16112 HST/ACS-HRC +01:52:56.50 +10:08:47.4 42.07017 -0.02300 0.00090 +0.07400 0.00200
2006/07/30  22.14264 HST/ACS-HRC +01:52:57.62 +10:08:31.0 42.01231 +0.00000 0.05000 +0.00000 0.05000
2006/08/10  20.35536 HST/ACS-HRC +01:52:54.35 +10:07:00.2 41.82899 +0.07080 0.00050 -0.14340 0.00030
2006/08/17  17.03904 HST/ACS-HRC +01:52:47.03 +10:05:34.3 41.71891 +0.03480 0.00080 -0.10570 0.00090
2012/12/07  06.95808 Keck/NIRC2 +02:19:02.10 +09:24:17.2 40.52974 +0.07400 0.00300 -0.13300 0.00300
plus proprietary data                

Orbital knowledge

Comments: Orbit published here. Also see Astro-PH preprint.
Parameter Value Units
P period8.3095±0.0001days
a semimajor axis4750±40kilometers
e eccentricity0.18±0.02dimensionless
i inclination63.1±0.3degrees
ε mean longitude at epoch142.0±0.3degrees
Ω longitude of ascending node206.1±0.3degrees
ϖ longitude of periapsis213±1degrees

Angles are referenced to J2000 equatorial coordinates.

Epoch = Julian date 2454000.0

2015/04/20 22:35


Last updated: 2015/04/20 22:35 UT