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
2015-04-30 10:29:16 C 15 28 07.51 +35 04 38.1 o 926
2015-05-01 05:37:13 C 15 28 02.74 +36 04 15.7 o 926
2015-05-01 05:47:26 C 15 28 02.59 +36 04 48.5 o 926
2015-05-01 05:57:08 C 15 28 02.44 +36 05 19.4 o 926
2015-05-06 06:37:22 C 15 26 39.22 +43 01 55.7 o 926
2015-05-06 06:43:15 C 15 26 38.11 +43 02 13.9 u H21
2015-05-06 06:43:55 C 15 26 39.03 +43 02 20.0 o 926
2015-05-06 06:47:36 C 15 26 37.97 +43 02 30.6 u H21
2015-05-06 06:50:24 C 15 26 38.90 +43 02 45.0 o 926
2015-05-06 06:51:57 C 15 26 37.87 +43 02 47.0 u H21
2015-05-06 06:56:10 C 15 26 37.76 +43 03 02.7 u H21
2015-05-06 07:00:23 C 15 26 37.64 +43 03 18.6 u H21
2015-05-06 07:05:23 C 15 26 37.50 +43 03 37.4 u H21
2015-05-06 07:07:19 C 15 26 37.44 +43 03 44.8 q H21
2015-05-06 07:14:07 C 15 26 37.33 +43 04 10.4 q H21
2015-05-06 07:20:49 C 15 26 38.06 +43 04 40.5 o 926
2015-05-06 07:20:56 C 15 26 37.11 +43 04 35.6 q H21
2015-05-06 07:27:14 C 15 26 37.89 +43 05 04.6 o 926
2015-05-06 07:33:40 C 15 26 37.69 +43 05 28.8 o 926
2015-05-07 06:14:47 C 15 26 13.18 +44 32 21.8 u H21
2015-05-07 06:18:58 C 15 26 13.02 +44 32 37.8 u H21
2015-05-07 06:23:09 C 15 26 12.89 +44 32 54.3 u H21
2015-05-07 06:27:20 C 15 26 12.76 +44 33 10.5 u H21
2015-05-07 08:22:08 C 15 26 10.31 +44 40 42.9 o 926
2015-05-07 08:28:33 C 15 26 10.07 +44 41 08.5 o 926
2015-05-07 08:34:58 C 15 26 09.81 +44 41 33.3 o 926
2015-05-08 10:30:27 C 15 25 36.23 +46 24 51.0 o 926
2015-05-08 10:39:18 C 15 25 35.93 +46 25 25.8 o 926
2015-05-08 10:47:15 C 15 25 35.64 +46 25 57.3 o 926
2015-05-09 07:00:59 C 15 25 09.09 +47 49 31.0 t 705
2015-05-09 07:02:51 C 15 25 09.07 +47 49 40.5 t 705
2015-05-09 07:04:44 C 15 25 08.83 +47 49 47.2 t 705
2015-05-09 09:55:15 C 15 25 02.82 +48 01 41.7 o 926
2015-05-09 10:01:40 C 15 25 02.56 +48 02 08.3 o 926
2015-05-09 10:08:04 C 15 25 02.28 +48 02 35.8 o 926
2015-05-10 10:59:38 C 15 24 20.92 +49 49 05.7 o 926
2015-05-10 11:06:06 C 15 24 20.65 +49 49 33.1 o 926
2015-05-10 11:12:35 C 15 24 20.39 +49 50 01.4 o 926
2015-05-11 10:18:02 C 15 23 37.49 +51 32 41.0 q 703
2015-05-11 10:25:20 C 15 23 37.18 +51 33 14.3 q 703
2015-05-11 10:32:37 C 15 23 36.75 +51 33 44.7 q 703
2015-05-12 08:16:15 C 15 22 50.93 +53 13 34.7 q H21
2015-05-12 08:22:57 C 15 22 50.61 +53 14 05.6 q H21
2015-05-12 08:29:41 C 15 22 50.28 +53 14 36.7 q H21
2015-05-13 06:50:08 C 15 21 57.20 +55 00 44.4 u H21
2015-05-13 06:52:14 C 15 21 57.07 +55 00 54.4 u H21
2015-05-13 06:53:55 C 15 21 56.97 +55 01 02.5 u H21
2015-05-13 06:55:52 C 15 21 56.86 +55 01 11.9 u H21
2015-05-14 04:11:48 C 15 21 00.43 +56 45 24.1 u H21
2015-05-14 04:19:50 C 15 20 59.90 +56 46 04.2 u H21