Salacia and Actaea (120347 2004 SB60)

System parameters

Heliocentric orbitPhotometry Position 2022/03/21 22:18 UTC
DES class = SCATEXTD HV = 4.24±0.02 +23:44:05.37 +23:53:56.2
<a> = 42.10 (AU) V = 20.8 (V2 = 23.3) Uncertainty = 0.1 (arcsec)
<e> = 0.104 Δmag = 2.36 Rates: +4.024, +1.467 ("/hr)
<i> = 25.57 (degrees) B-V = 0.65±0.06  
Perihelion = 2202 V-R = 0.49±0.05 Opposition: September
Aphelion = 2064    

Astrometric observations

Observation time (UTC)Observatory/InstrumentRADEC Δ (AU)Δx (arcsec) Δx errorΔy (arcsec) Δy error
2006/07/21  21.95826 HST/ACS-HRC +22:39:08.34 +15:50:03.3 43.15938 +0.04706 0.00070 -0.10224 0.00050
2007/07/13  21.10167 HST/WFPC2-PC +22:43:50.85 +16:28:03.8 43.37280 +0.02193 0.00391 -0.11084 0.01344
2007/07/15  19.91417 HST/WFPC2-PC +22:43:45.36 +16:28:27.8 43.34782 +0.12371 0.00448 +0.09208 0.00206
2007/08/11  11.13916 HST/WFPC2-PC +22:42:09.05 +16:29:16.7 43.07438 +0.17781 0.00200 +0.00363 0.00303
2007/08/12  06.68639 HST/WFPC2-PC +22:42:05.61 +16:29:10.0 43.06834 +0.12785 0.00391 +0.09402 0.00188
2007/08/12  09.81555 HST/WFPC2-PC +22:42:05.06 +16:29:08.9 43.06739 +0.10084 0.00863 +0.09889 0.00316
2007/09/03  09.71833 HST/WFPC2-PC +22:40:26.90 +16:23:17.6 42.96765 +0.10314 0.00358 +0.09949 0.00347
2008/05/19  18.56861 HST/WFPC2-PC +22:48:36.43 +16:39:03.8 44.28520 -0.10096 0.00200 +0.07422 0.00200
2009/12/11  06.51201 Keck 2/NIRC2 +22:45:21.45 +16:47:26.4 44.08289 +0.05801 0.00613 +0.10558 0.00300
2010/08/03  09.73389 Keck 2/NIRC2 +22:55:41.26 +18:25:50.9 43.45741 +0.18274 0.00300 +0.01839 0.00300
2013/07/18  12.64028 Gemini/NIRI +23:09:36.80 +20:14:59.2 43.94279 -0.19689 0.10000 -0.07799 0.10000
2013/08/24  12.29278 Gemini/NIRI +22:59:48.36 -05:41:57.8 40.86095 -0.06779 0.10000 +0.11576 0.10000
2015/07/31  11.85365 Keck 2/NIRC2 +23:17:46.29 +21:28:19.9 43.98163 +0.05868 0.00312 -0.08215 0.00654
2016/08/06  11.23663 Keck 2/NIRC2 +23:21:48.42 +22:03:38.9 43.99952 -0.18064 0.00300 -0.05189 0.00300
plus proprietary data                

Orbital knowledge

Comments: Orbit published by Stansberry et al. 2012, and updated here.
Parameter Value Units
P period5.49389±0.00001days
a semimajor axis5730±10kilometers
e eccentricity0.009±0.003dimensionless
i inclination23.5±0.3degrees
ε mean longitude at epoch303.8±0.3degrees
Ω longitude of ascending node45±1degrees
ϖ longitude of periapsis130±30degrees

Angles are referenced to J2000 equatorial coordinates.

Epoch = Julian date 2454300.0

2022/03/21 22:18


Last updated: 2022/03/21 22:18 UTC