IAA RAS IAA Minor Planet Database

2011 US91

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2393009970
Semi-major axis (a)1.0358575130 AU
Inclination (i)29.31838339°
Long. of Asc. Node (Ω)21.96484564°
Arg. of Perihelion (ω)245.92937805°
Mean Anomaly (M)224.47499303°
Mean Motion (n)0.9349222200°/day
Perihelion dist (q)0.78796120 AU
Aphelion dist (Q)1.28368560 AU
Orbital Period1.05421350 yr
Physical Parameters
H (abs. magnitude)22.30
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-18
RMS Residual0.179″
Uncertainty—
Orbit TypeApollo
MOID0.073206 AU
Observations Used47
Oppositions1
Arc Total2011-2011
First Observation Used—
Last Observation Used2011-11-03
Observations (48)
Date Type RA Dec Mag Band Observatory
2011-10-23 07:02:21 C 00 22 30.276 +35 44 28.96 – L F51
2011-10-23 07:19:50 C 00 22 22.322 +35 45 13.54 – L F51
2011-10-23 07:40:40 C 00 22 12.901 +35 46 05.95 – L F51
2011-10-24 02:06:25 C 00 14 30.84 +36 28 28.7 – o H01
2011-10-24 02:14:34 C 00 14 27.44 +36 28 47.2 – o H01
2011-10-24 02:25:40 C 00 14 22.78 +36 29 12.3 – o H01
2011-10-24 02:35:19 C 00 14 18.74 +36 29 34.0 – o H01
2011-10-24 05:28:48 C 00 13 09.56 +36 35 55.0 – o F65
2011-10-24 05:29:39 C 00 13 09.22 +36 35 56.9 – o F65
2011-10-24 05:30:29 C 00 13 08.87 +36 35 58.6 – o F65
2011-10-24 05:31:19 C 00 13 08.53 +36 36 00.4 – o F65
2011-10-24 05:32:11 C 00 13 08.18 +36 36 02.6 – o F65
2011-10-24 05:33:02 C 00 13 07.81 +36 36 04.3 – o F65
2011-10-24 05:33:54 C 00 13 07.45 +36 36 06.3 – o F65
2011-10-24 05:34:45 C 00 13 07.11 +36 36 08.1 – o F65
2011-10-24 05:35:38 C 00 13 06.74 +36 36 10.1 – o F65
2011-10-24 06:16:06 C 00 12 49.919 +36 37 38.88 – L F51
2011-10-24 06:32:44 C 00 12 42.993 +36 38 15.00 – L F51
2011-10-24 06:51:59 C 00 12 31.58 +36 38 46.3 – o 291
2011-10-24 06:52:02 C 00 12 34.926 +36 38 56.84 – L F51
2011-10-24 06:54:31 C 00 12 30.51 +36 38 51.8 – o 291
2011-10-24 06:57:04 C 00 12 29.43 +36 38 56.8 – o 291
2011-10-24 17:04:55 C 00 08 35.57 +36 59 06.8 – u B18
2011-10-24 17:05:54 C 00 08 35.17 +36 59 08.8 – u B18
2011-10-24 17:09:59 C 00 08 33.54 +36 59 17.3 – u B18
2011-10-25 01:11:50 C 00 05 32.54 +37 14 24.5 – t H21
2011-10-25 01:20:40 C 00 05 29.17 +37 14 41.1 – t H21
2011-10-25 01:29:30 C 00 05 25.74 +37 14 58.1 – t H21
2011-10-27 02:47:35 C 23 48 48.47 +38 30 13.2 – t G58
2011-10-27 02:53:21 C 23 48 46.64 +38 30 21.1 – t G58
2011-10-27 03:06:39 C 23 48 42.41 +38 30 38.8 – t G58
2011-10-30 01:58:39 C 23 29 52.95 +39 40 44.9 – t H21
2011-10-30 02:06:00 C 23 29 51.18 +39 40 50.6 – t H21
2011-10-30 02:13:22 C 23 29 49.37 +39 40 56.8 – t H21
2011-10-30 02:20:43 C 23 29 47.62 +39 41 02.0 – t H21
2011-10-30 06:30:06 C 23 28 49.62 +39 44 08.0 – t G58
2011-10-30 06:39:48 C 23 28 47.31 +39 44 14.6 – t G58
2011-10-30 06:50:09 C 23 28 44.89 +39 44 21.6 – t G58
2011-11-01 01:44:19 C 23 19 57.87 +40 11 32.1 – o H21
2011-11-01 01:56:01 C 23 19 55.53 +40 11 38.6 – o H21
2011-11-01 02:08:06 C 23 19 53.13 +40 11 45.4 – o H21
2011-11-01 02:20:57 C 23 19 50.56 +40 11 52.3 – o H21
2011-11-02 06:21:01 C 23 14 51.94 +40 25 41.6 – o 291
2011-11-02 06:24:41 C 23 14 51.29 +40 25 42.9 – o 291
2011-11-02 06:28:25 C 23 14 50.63 +40 25 44.5 – o 291
2011-11-03 04:53:20 C 23 11 18.27 +40 35 06.1 – o 291
2011-11-03 04:56:43 C 23 11 17.69 +40 35 07.4 – o 291
2011-11-03 05:00:10 C 23 11 17.11 +40 35 08.3 – o 291