2011 UH21

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4543861385 ± 2.00e-08
Semi-major axis (a)1.9594544648 AU ± 4.17e-09
Inclination (i)3.40143079° ± 2.92e-06
Long. of Asc. Node (Ω)21.19860390° ± 3.64e-05
Arg. of Perihelion (ω)51.01346287° ± 4.51e-05
Mean Anomaly (M)32.96375334° ± 1.15e-05
Mean Motion (n)0.3593432678°/day ± 1.15e-09
Perihelion dist (q)1.06910552 AU ± 3.93e-08
Aphelion dist (Q)2.84980341 AU ± 3.97e-08
Orbital Period2.74285446 yr ± 8.75e-09
Physical Parameters
H (abs. magnitude)23.05
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.282″
Uncertainty0
Orbit TypeAmor
MOID0.093940 AU
Observations Used74
Oppositions8
Arc Total2011-2023
First Observation Used2011-10-20
Last Observation Used2023-01-26
Observations (78)
Date Type RA Dec Mag Band Observatory
2011-11-19 04:41:00 C 06 39 39.45 +42 39 14.7 v 586
2011-12-23 05:13:52 C 09 40 55.81 +37 45 55.5 o 950
2011-12-23 05:16:09 C 09 40 55.91 +37 45 54.0 o 950
2011-12-23 05:18:25 C 09 40 56.02 +37 45 52.6 o 950
2011-12-23 05:20:43 C 09 40 56.12 +37 45 51.2 o 950
2011-12-23 05:23:00 C 09 40 56.22 +37 45 49.8 o 950
2011-12-23 05:25:16 C 09 40 56.32 +37 45 48.3 o 950
2011-12-23 05:27:33 C 09 40 56.43 +37 45 46.9 o 950
2011-12-26 09:57:27 C 09 44 55.48 +37 00 16.8 u H21
2011-12-26 10:12:35 C 09 44 55.89 +37 00 07.6 u H21
2011-12-26 10:27:43 C 09 44 56.31 +36 59 58.6 u H21
2011-12-26 10:38:49 C 09 44 56.63 +36 59 51.9 u H21
2011-12-28 09:11:50 C 09 46 40.23 +36 33 40.7 o 291
2011-12-28 09:20:00 C 09 46 40.40 +36 33 36.4 o 291
2012-01-14 10:18:48 C 09 44 12.74 +33 11 50.1 o 291
2012-01-14 10:24:29 C 09 44 12.48 +33 11 47.7 o 291
2012-01-14 10:30:10 C 09 44 12.25 +33 11 44.2 o 291
2012-02-20 05:09:09 C 09 12 38.09 +26 09 48.4 o H21
2012-02-20 05:40:53 C 09 12 37.49 +26 09 32.5 o H21
2012-02-20 06:10:32 C 09 12 36.94 +26 09 17.8 o H21
2022-12-21 11:30:54 C 10 54 15.858 +22 04 06.71 V I52
2022-12-21 11:39:48 C 10 54 16.351 +22 04 03.61 V I52
2022-12-21 11:48:42 C 10 54 16.787 +22 04 00.91 V I52
2022-12-21 11:57:37 C 10 54 17.320 +22 03 57.60 V I52
2023-01-17 14:43:31 C 11 02 12.019 +20 19 56.31 V T12
2023-01-26 08:58:44 C 10 52 39.533 +20 24 07.60 V I52
2023-01-26 09:11:44 C 10 52 38.701 +20 24 08.32 V I52
2023-01-26 10:06:10 C 10 52 35.310 +20 24 09.32 V I52