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
2019-05-31 09:50:43 C 19 07 43.74 +25 46 04.3 V 654
2019-05-31 10:30:20 C 19 08 39.96 +25 51 18.1 V 654
2019-05-31 23:34:09 C 19 28 17.09 +27 25 44.4 V Z80
2019-05-31 23:35:24 C 19 28 18.92 +27 25 53.6 V Z80
2019-05-31 23:37:49 C 19 28 22.40 +27 26 11.0 V Z80
2019-05-31 23:39:15 C 19 28 24.46 +27 26 21.8 V Z80
2019-05-31 23:42:06 C 19 28 28.59 +27 26 40.7 V Z80
2019-05-31 23:44:54 C 19 28 32.66 +27 27 00.8 V Z80
2019-05-31 23:46:57 C 19 28 35.60 +27 27 16.1 V Z80
2019-05-31 23:48:23 C 19 28 37.74 +27 27 26.0 V Z80
2019-05-31 23:49:39 C 19 28 39.52 +27 27 34.8 V Z80
2019-05-31 23:51:21 C 19 28 41.99 +27 27 46.8 V Z80
2019-06-01 00:49:37 C 19 30 04.40 +27 35 15.2 q 160
2019-06-01 00:52:19 C 19 30 08.24 +27 35 34.0 q 160
2019-06-01 00:56:15 C 19 30 13.85 +27 36 00.7 q 160
2019-06-05 16:45:15 S 21 47 42.235 +32 56 23.64 L C51
2019-06-05 21:28:00 S 21 51 55.282 +32 57 00.86 L C51
2019-09-04 13:53:24 C 00 38 13.451 +17 25 29.81 U F51
2019-09-04 14:10:40 C 00 38 12.300 +17 25 16.01 U F51
2019-09-04 14:45:16 C 00 38 09.982 +17 24 48.03 U F51
2019-09-30 05:34:43 C 00 03 39.47 +09 05 38.2 V G96
2019-09-30 05:42:52 C 00 03 39.09 +09 05 33.4 V G96
2019-09-30 05:51:03 C 00 03 38.64 +09 05 27.0 V G96
2019-09-30 05:59:14 C 00 03 38.31 +09 05 21.7 V G96
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)