2011 HP

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4802864981 ± 7.29e-09
Semi-major axis (a)1.9206195258 AU ± 8.20e-10
Inclination (i)3.72371494° ± 1.51e-06
Long. of Asc. Node (Ω)229.48069778° ± 6.91e-06
Arg. of Perihelion (ω)46.34569337° ± 8.60e-06
Mean Anomaly (M)148.38685476° ± 1.59e-06
Mean Motion (n)0.3702970622°/day ± 2.37e-10
Perihelion dist (q)0.99817190 AU ± 1.40e-08
Aphelion dist (Q)2.84306715 AU ± 1.40e-08
Orbital Period2.66171780 yr ± 1.71e-09
Physical Parameters
H (abs. magnitude)22.20
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.275″
Uncertainty0
Orbit TypeApollo
MOID0.027782 AU
Observations Used414
Radar Obs Used1
Oppositions5
Arc Total2011-2019
First Observation Used2011-04-13
Last Observation Used2019-09-30
Observations (424)
Date Type RA Dec Mag Band Observatory
2011-04-13 10:38:03 C 14 00 26.223 -19 53 37.30 V F51
2011-04-13 10:52:55 C 14 00 26.389 -19 53 37.11 V F51
2011-04-13 12:55:00 C 14 00 27.790 -19 53 33.81 V F51
2011-04-13 13:10:45 C 14 00 27.975 -19 53 33.08 V F51
2011-04-24 07:19:05 C 14 06 44.35 -19 23 52.1 r G96
2011-04-24 07:31:22 C 14 06 44.56 -19 23 49.6 r G96
2011-04-24 07:43:05 C 14 06 44.82 -19 23 46.5 r G96
2011-04-24 07:54:46 C 14 06 45.03 -19 23 43.5 r G96
2011-04-24 09:05:22 C 14 06 46.44 -19 23 26.1 r G96
2011-04-24 09:18:04 C 14 06 46.69 -19 23 23.0 r G96
2011-04-24 09:30:42 C 14 06 46.94 -19 23 19.7 r G96
2011-04-24 09:43:24 C 14 06 47.23 -19 23 16.5 r G96
2011-04-24 12:46:16 C 14 06 55.61 -19 21 48.7 u D90
2011-04-24 13:14:58 C 14 06 56.23 -19 21 42.3 u D90
2011-04-24 23:27:56 C 14 07 14.98 -19 20 06.1 u J95
2011-04-25 00:01:11 C 14 07 15.73 -19 19 59.6 u J95
2011-04-25 11:07:29 C 14 07 39.49 -19 16 08.7 D96
2011-04-25 11:13:55 C 14 07 39.67 -19 16 08.2 D96
2011-04-25 11:20:48 C 14 07 39.80 -19 16 06.4 D96
2011-04-26 06:42:14 C 14 08 15.65 -19 10 54.0 o 807
2011-04-26 06:47:27 C 14 08 15.77 -19 10 52.4 o 807
2011-04-26 06:53:15 C 14 08 15.95 -19 10 50.5 o 807
2011-04-26 08:30:50 C 14 08 20.04 -19 11 08.9 r G96
2011-04-26 08:43:05 C 14 08 20.36 -19 11 05.2 r G96
2011-04-26 08:55:47 C 14 08 20.65 -19 11 01.2 r G96
2011-04-26 09:08:04 C 14 08 20.94 -19 10 57.5 r G96
2011-04-27 06:35:29 C 14 09 07.19 -19 03 43.5 o 807
2011-04-27 06:41:22 C 14 09 07.37 -19 03 41.2 o 807
2011-04-27 06:47:14 C 14 09 07.54 -19 03 39.5 o 807
2011-04-27 06:53:08 C 14 09 07.68 -19 03 37.6 o 807
2011-04-28 07:34:43 C 14 10 06.07 -18 56 15.9 u 448
2011-04-28 07:41:56 C 14 10 06.30 -18 56 13.4 u 448
2011-04-28 07:49:08 C 14 10 06.57 -18 56 11.0 u 448
2011-04-28 08:02:32 C 14 10 06.72 -18 56 06.5 u 448
2011-04-28 08:13:39 C 14 10 05.65 -18 55 08.2 o 807
2011-04-28 08:19:29 C 14 10 05.84 -18 55 05.8 o 807
2011-04-28 08:25:20 C 14 10 06.04 -18 55 03.5 o 807
2011-04-28 08:31:11 C 14 10 06.23 -18 55 00.9 o 807
2011-04-29 01:03:12 C 14 10 52.18 -18 49 04.3 o 807
2011-04-29 01:07:22 C 14 10 52.33 -18 49 03.0 o 807
2011-04-29 01:11:31 C 14 10 52.48 -18 49 01.5 o 807
2011-05-01 23:42:19 C 14 14 10.81 -18 19 59.6 v 204
2011-05-01 23:47:34 C 14 14 11.02 -18 19 56.8 v 204
2011-05-01 23:53:22 C 14 14 11.25 -18 19 53.9 v 204
2011-05-04 05:28:26 C 14 17 20.91 -17 51 08.4 o H21
2011-05-04 05:30:51 C 14 17 21.05 -17 51 07.2 o H21
2011-05-04 05:33:51 C 14 17 21.19 -17 51 05.4 o H21
2011-05-04 05:36:33 C 14 17 21.32 -17 51 03.8 o H21
2011-05-06 04:51:02 C 14 20 42.66 -17 20 39.0 o H26
2011-05-06 04:53:31 C 14 20 42.83 -17 20 36.8 o H26
Radar Observations (1)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2019-05-29 05:03:00 31961256.79 4 us 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)