Manwë and Thorondor (385446 2003 QW111)

System parameters

Heliocentric orbitPhotometry Position 2022/03/21 22:19 UTC
DES class = 7:4EEE HV = 7.44±0.05 +00:02:27.43 -02:23:03.4
<a> = 43.73 (AU) V = 23.8 (V2 = 25.3) Uncertainty = 0.5 (arcsec)
<e> = 0.110 Δmag = 1.20 Rates: +3.561, +1.551 ("/hr)
<i> = 1.13 (degrees) B-V = NULL  
Perihelion = 2080 V-R = 0.7±0.1 Opposition: September
Aphelion = 2227    

Additional links

Astrometric observations

Observation time (UTC)Observatory/InstrumentRADEC Δ (AU)Δx (arcsec) Δx errorΔy (arcsec) Δy error
2006/07/25  09.13488 HST/ACS-HRC +22:54:39.68 -09:53:17.1 43.94387 +0.29481 0.00102 -0.13481 0.00137
2007/07/25  03.63916 HST/WFPC2-PC +22:59:12.43 -09:25:09.0 43.86811 +0.15555 0.00207 -0.09787 0.00100
2007/08/26  13.70167 HST/WFPC2-PC +22:57:12.17 -09:38:21.3 43.63685 +0.02769 0.03758 -0.02305 0.04370
2008/08/04  19.21375 HST/WFPC2-PC +23:03:07.61 -09:01:05.2 43.66556 +0.16065 0.00247 -0.05012 0.00264
2008/08/20  15.58042 HST/WFPC2-PC +23:02:07.05 -09:07:44.4 43.55922 +0.26190 0.00161 -0.10930 0.00133
2008/09/07  14.09361 HST/WFPC2-PC +23:00:51.24 -09:15:39.7 43.52419 +0.30000 0.00400 -0.13446 0.00400
2008/10/26  19.53694 HST/WFPC2-PC +22:57:52.09 -09:32:28.7 43.89273 -0.07560 0.00641 +0.02076 0.00375
2013/11/20  16.50826 HST/WFC3 +23:19:51.17 -07:11:29.9 43.63951 +0.19644 0.00272 -0.10570 0.00387

Orbital knowledge

Comments: Orbit published here. Updated orbit with mutual event circumstances published here.
Parameter Value Units
P period110.18±0.02days
a semimajor axis6670±40kilometers
e eccentricity0.563±0.007dimensionless
i inclination25.6±0.2degrees
ε mean longitude at epoch126.5±0.5degrees
Ω longitude of ascending node163.6±0.8degrees
ϖ longitude of periapsis251±2degrees

Angles are referenced to J2000 equatorial coordinates.

Epoch = Julian date 2454400.0

2022/03/21 22:19


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