2015 HP171

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.6176822861 ± 8.07e-08
Semi-major axis (a)1.8067603201 AU ± 1.70e-08
Inclination (i)11.73279831° ± 6.18e-06
Long. of Asc. Node (Ω)126.66217238° ± 1.21e-04
Arg. of Perihelion (ω)190.93737378° ± 1.18e-04
Mean Anomaly (M)97.88876969° ± 2.15e-05
Mean Motion (n)0.4058385200°/day ± 5.73e-09
Perihelion dist (q)0.69075640 AU ± 1.46e-07
Aphelion dist (Q)2.92276420 AU ± 1.48e-07
Orbital Period2.42857100 yr ± 3.43e-08
Physical Parameters
H (abs. magnitude)20.09
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-18
RMS Residual0.382″
Uncertainty0
Orbit TypeApollo
MOID0.188230 AU
Observations Used118
Oppositions3
Arc Total2015-2022
First Observation Used
Last Observation Used2022-12-24
Observations (133)
Date Type RA Dec Mag Band Observatory
2015-05-14 04:27:59 C 15 20 59.36 +56 46 44.8 u H21
2015-05-19 07:54:24 C 15 11 11.13 +67 56 39.2 o 926
2015-05-19 07:59:25 C 15 11 10.31 +67 57 08.3 o 926
2015-05-19 08:04:27 C 15 11 09.52 +67 57 37.8 o 926
2015-05-27 06:13:45 C 11 12 37.60 +87 10 35.4 o 926
2015-05-27 06:22:58 C 11 11 16.07 +87 11 00.2 o 926
2015-05-27 06:32:08 C 11 09 54.39 +87 11 24.8 o 926
2015-11-20 07:43:58 C 07 32 10.43 +08 23 57.2 t 705
2015-11-20 07:45:25 C 07 32 10.36 +08 23 57.1 t 705
2015-11-20 07:46:51 C 07 32 10.25 +08 23 56.2 t 705
2015-12-04 07:50:56 C 07 13 10.89 +09 14 30.3 t 705
2015-12-04 07:52:23 C 07 13 10.73 +09 14 30.3 t 705
2015-12-04 07:53:50 C 07 13 10.68 +09 14 30.4 t 705
2022-12-20 01:25:18 C 23 45 34.276 -20 56 24.40 V V06
2022-12-20 01:29:11 C 23 45 35.179 -20 56 17.38 V V06
2022-12-20 01:36:58 C 23 45 37.015 -20 56 03.66 V V06
2022-12-24 02:12:54 C 00 07 31.92 -18 04 10.5 o 291
2022-12-24 02:45:19 C 00 07 38.82 -18 03 13.5 o 291
2015-04-18 03:05:52 C 13 00 52.58 -15 37 57.1 21.9 W84
2015-04-18 03:10:30 C 13 00 52.38 -15 37 57.4 W84
2015-04-18 03:15:06 C 13 00 52.18 -15 37 57.5 W84
2015-04-18 03:19:39 C 13 00 51.98 -15 37 57.8 W84
2015-04-18 03:24:19 C 13 00 51.79 -15 37 58.0 W84
2015-04-19 02:50:36 C 12 59 53.38 -15 39 03.3 21.9 W84
2015-04-19 02:55:10 C 12 59 53.19 -15 39 03.5 W84
2015-04-19 02:59:49 C 12 59 52.99 -15 39 03.7 W84
2015-04-19 03:04:29 C 12 59 52.79 -15 39 03.9 W84
2015-04-19 03:09:05 C 12 59 52.60 -15 39 04.1 W84
2015-04-21 02:52:06 C 12 57 55.70 -15 41 05.8 22.1 W84
2015-04-21 02:56:39 C 12 57 55.51 -15 41 05.9 W84
2015-04-21 03:01:13 C 12 57 55.32 -15 41 06.1 W84
2015-04-21 03:05:46 C 12 57 55.13 -15 41 06.2 W84
2015-04-21 03:10:19 C 12 57 54.95 -15 41 06.5 W84