2011 UK21

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4261357000
Semi-major axis (a)1.7074825000 AU
Inclination (i)7.64192000°
Long. of Asc. Node (Ω)32.97192000°
Arg. of Perihelion (ω)23.52280000°
Mean Anomaly (M)101.49738000°
Mean Motion (n)0.4417430200°/day
Perihelion dist (q)0.97986320 AU
Aphelion dist (Q)2.43510180 AU
Orbital Period2.23117890 yr
Physical Parameters
H (abs. magnitude)25.20
G (slope)0.15
Orbit Solution
SourceMPC
Solution Date
RMS Residual0.620″
Uncertainty6
Orbit TypeApollo
MOID0.007407 AU
Observations Used31
Radar Obs Used1
Oppositions1
Arc Total
First Observation Used
Last Observation Used2011-10-25
Observations (33)
Date Type RA Dec Mag Band Observatory
2011-10-20 10:37:32 C 04 30 40.60 -04 00 41.6 r 703
2011-10-20 10:45:40 C 04 30 48.70 -03 59 00.3 r 703
2011-10-20 10:53:49 C 04 30 56.80 -03 57 19.5 r 703
2011-10-20 11:01:58 C 04 31 05.01 -03 55 36.8 r 703
2011-10-20 11:49:39 C 04 31 53.11 -03 45 36.8 r 703
2011-10-20 11:51:19 C 04 31 54.76 -03 45 15.9 r 703
2011-10-20 11:52:59 C 04 31 56.46 -03 44 55.2 r 703
2011-10-20 11:54:40 C 04 31 58.04 -03 44 34.8 r 703
2011-10-21 02:00:45 C 04 47 42.80 -00 41 32.3 t 204
2011-10-21 02:09:53 C 04 47 52.69 -00 39 29.4 t 204
2011-10-21 02:17:23 C 04 48 00.81 -00 37 48.1 t 204
2011-10-21 02:26:50 C 04 48 11.02 -00 35 40.7 t 204
2011-10-21 06:18:50 C 04 52 42.12 +00 23 03.1 c 821
2011-10-21 06:21:10 C 04 52 44.65 +00 23 34.6 c 821
2011-10-21 06:23:37 C 04 52 47.28 +00 24 08.8 c 821
2011-10-21 08:54:32 C 04 55 44.12 +00 53 30.1 19.4 c 704
2011-10-21 08:58:19 C 04 55 43.04 +00 53 59.0 t H21
2011-10-21 09:03:11 C 04 55 48.41 +00 55 06.7 t H21
2011-10-21 09:08:12 C 04 55 53.89 +00 56 16.0 t H21
2011-10-21 09:11:47 C 04 56 03.15 +00 57 28.9 19.7 c 704
2011-10-21 09:12:56 C 04 55 59.13 +00 57 22.2 t H21
2011-10-21 09:29:40 C 04 56 22.76 +01 01 37.8 19.4 c 704
2011-10-21 09:46:37 C 04 56 41.46 +01 05 33.7 20.2 c 704
2011-10-21 09:48:29 C 04 56 40.52 +01 05 37.6 u H36
2011-10-21 09:53:09 C 04 56 45.71 +01 06 42.6 u H36
2011-10-21 09:57:47 C 04 56 50.79 +01 07 46.5 u H36
2011-10-21 10:04:03 C 04 57 00.66 +01 09 35.4 19.6 c 704
2011-10-22 09:24:59 C 05 25 25.14 +06 43 42.5 t H21
2011-10-22 09:29:01 C 05 25 29.92 +06 44 41.8 t H21
2011-10-22 09:33:03 C 05 25 34.69 +06 45 40.5 t H21
2011-10-22 09:37:04 C 05 25 39.49 +06 46 39.5 t H21
2011-10-25 08:24:32 C 06 57 40.76 +22 39 22.3 u H21
2011-10-25 08:28:02 C 06 57 45.00 +22 40 01.8 u H21
Radar Observations (1)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2011-10-22 08:22:00 14071.1377 1 Hz 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)