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
2011-05-20 00:04:37 C 15 17 59.84 -08 50 03.0 v 204
2011-05-20 06:00:42 C 15 20 10.42 -08 30 32.9 r 703
2011-05-20 06:11:21 C 15 20 13.92 -08 29 58.2 r 703
2011-05-20 06:21:55 C 15 20 17.41 -08 29 23.6 r 703
2011-05-20 06:32:30 C 15 20 20.86 -08 28 48.6 r 703
2011-05-20 06:59:13 C 15 20 24.33 -08 24 50.1 o 807
2011-05-20 07:01:41 C 15 20 25.14 -08 24 41.8 o 807
2011-05-20 07:04:09 C 15 20 25.98 -08 24 33.5 o 807
2011-05-20 07:06:36 C 15 20 26.82 -08 24 25.2 o 807
2011-05-20 07:09:04 C 15 20 27.65 -08 24 16.9 o 807
2011-05-20 21:25:01 C 15 26 00.66 -07 37 58.5 c A24
2011-05-20 21:26:13 C 15 26 01.12 -07 37 54.8 c A24
2011-05-20 22:14:59 C 15 26 18.95 -07 34 59.5 c A24
2011-05-20 22:15:44 C 15 26 19.22 -07 34 56.4 c A24
2011-05-20 22:16:28 C 15 26 19.53 -07 34 54.0 c A24
2011-05-22 06:52:55 C 15 40 27.64 -05 24 24.2 o H21
2011-05-22 06:55:53 C 15 40 28.95 -05 24 11.1 o H21
2011-05-22 06:59:55 C 15 40 30.74 -05 23 53.3 o H21
2011-05-22 07:03:59 C 15 40 32.56 -05 23 35.2 o H21
2011-05-22 07:12:06 C 15 40 36.16 -05 22 59.2 o H21
2011-05-22 07:16:37 C 15 40 38.17 -05 22 39.2 o H21
2011-05-22 21:59:57 C 15 48 06.54 -04 14 46.3 c A24
2011-05-22 22:00:42 C 15 48 06.92 -04 14 42.4 c A24
2011-05-22 22:01:28 C 15 48 07.28 -04 14 39.1 c A24
2011-05-22 23:08:17 C 15 48 40.03 -04 09 14.7 c A24
2011-05-22 23:09:01 C 15 48 40.37 -04 09 11.3 c A24
2011-05-23 20:40:31 C 16 00 51.08 -02 16 59.7 c A24
2011-05-23 20:41:40 C 16 00 51.72 -02 16 54.0 c A24
2011-05-23 21:31:31 C 16 01 20.16 -02 12 16.4 c A24
2011-05-23 21:32:36 C 16 01 20.66 -02 12 09.7 c A24
2011-05-24 08:37:16 C 16 08 06.93 -01 07 32.9 r 703
2011-05-24 08:51:13 C 16 08 15.32 -01 06 09.1 r 703
2011-05-24 09:05:11 C 16 08 23.67 -01 04 45.5 r 703
2011-05-24 09:19:11 C 16 08 32.20 -01 03 22.6 r 703
2011-05-25 01:35:35 C 16 19 37.22 +00 38 23.1 u J95
2011-05-25 01:47:22 C 16 19 45.23 +00 39 41.1 u J95
2011-05-25 01:58:37 C 16 19 52.88 +00 40 55.4 u J95
2011-05-25 04:20:14 C 16 21 42.99 +00 57 09.0 o H21
2011-05-25 04:24:50 C 16 21 46.14 +00 57 39.7 o H21
2011-05-25 04:28:52 C 16 21 48.89 +00 58 07.0 o H21
2011-05-25 04:32:55 C 16 21 51.66 +00 58 34.0 o H21
2011-05-25 04:36:57 C 16 21 54.42 +00 59 01.2 o H21
2011-05-25 21:49:14 C 16 35 04.13 +03 00 01.1 c A53
2011-05-25 21:52:00 C 16 35 06.24 +03 00 21.4 c A53
2011-05-25 21:54:46 C 16 35 08.36 +03 00 41.9 c A53
2011-05-25 21:57:14 C 16 35 10.24 +03 01 00.0 c A53
2011-05-25 22:06:07 C 16 35 16.25 +03 01 56.6 o 046
2011-05-25 22:06:53 C 16 35 16.85 +03 02 02.0 o 046
2011-05-25 22:08:25 C 16 35 18.01 +03 02 13.4 o 046
2011-05-25 22:10:41 C 16 35 19.76 +03 02 30.6 o 046
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)