1999 OJ4

System parameters

Heliocentric orbitPhotometry Position 2014/04/12 20:35 UT
DES class = CLASSICAL HV = 7.35±0.02 +22:43:25.47 -10:12:21.6
<a> = 38.09 (AU) V = 23.1 (V2 = 23.9) Uncertainty = 0.8 (arcsec)
<e> = 0.018 Δmag = 0.09 Rates: +3.310, +1.164 ("/hr)
<i> = 2.58 (degrees) B-V = NULL  
Perihelion = 2059 V-R = NULL Opposition: September
Aphelion = 1941    

Astrometric observations

Observation time (UT)Observatory/InstrumentRADEC Δ (AU)Δx (arcsec) Δx errorΔy (arcsec) Δy error
2002/10/04  14.35910 HST/NICMOS-NIC2 +21:24:55.73 -16:05:38.2 37.55838 -0.03528 0.00416 +0.07056 0.01008
2005/07/24  16.98776 HST/ACS-HRC +21:49:08.21 -14:25:27.7 37.15639 +0.09392 0.00056 +0.03652 0.00057
2007/07/05  23.30583 HST/WFPC2-PC +22:02:41.41 -13:26:19.5 37.32587 -0.01522 0.00222 -0.14436 0.00127
2007/07/07  10.59333 HST/WFPC2-PC +22:02:36.58 -13:26:49.5 37.30862 -0.02094 0.00165 -0.14481 0.00100
2007/07/12  21.10167 HST/WFPC2-PC +22:02:17.38 -13:28:47.3 37.24887 -0.05148 0.00281 -0.13556 0.00100
2007/08/01  22.20167 HST/WFPC2-PC +22:00:51.66 -13:37:12.1 37.09062 -0.07347 0.00233 +0.00338 0.00446
2007/08/24  09.42055 HST/WFPC2-PC +21:58:59.80 -13:47:41.0 37.04478 +0.10699 0.00247 +0.00925 0.00137
plus proprietary data                

Orbital knowledge

Comments: Orbit published here. Mirror ambiguity remains.
Parameter Value Units
P period84.13±0.02days
a semimajor axis3260±60kilometers
e eccentricity0.36±0.01dimensionless

Breaking the mirror ambiguity...

2014/04/12 20:35

Last updated: 2014/04/12 20:35 UT