516398 (2001 HW15)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2529866187 ± 4.20e-08
Semi-major axis (a)1.5253648305 AU ± 2.43e-09
Inclination (i)18.98584843° ± 8.90e-06
Long. of Asc. Node (Ω)56.47617765° ± 4.39e-06
Arg. of Perihelion (ω)194.90310609° ± 1.54e-05
Mean Anomaly (M)355.50051677° ± 1.82e-05
Mean Motion (n)0.5231806617°/day ± 1.25e-09
Perihelion dist (q)1.13946794 AU ± 6.41e-08
Aphelion dist (Q)1.91126172 AU ± 6.42e-08
Orbital Period1.88391192 yr ± 4.50e-09
Physical Parameters
H (abs. magnitude)20.35
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.354″
Uncertainty0
Orbit TypeAmor
MOID0.132932 AU
Observations Used181
Oppositions11
Arc Total2001-2024
First Observation Used2001-04-18
Last Observation Used2024-12-03
Observations (194)
Date Type RA Dec Mag Band Observatory
2003-10-30 05:43:43 C 00 27 47.153 -23 49 36.54 o 568
2003-10-30 05:48:30 C 00 27 46.938 -23 49 32.17 o 568
2005-11-05 08:51:30 C 02 14 41.11 -01 14 22.1 o 705
2005-11-05 08:52:41 C 02 14 40.97 -01 14 21.7 o 705
2005-11-05 08:56:16 C 02 14 40.77 -01 14 20.6 o 705
2005-11-09 08:53:14 C 02 07 13.63 -00 37 53.7 o 705
2005-11-09 08:58:01 C 02 07 13.24 -00 37 51.8 o 705
2005-11-19 07:15:55 C 01 51 26.36 +01 05 07.7 o 705
2005-11-19 07:17:07 C 01 51 26.27 +01 05 08.0 o 705
2007-11-08 05:33:12 C 03 54 18.62 +17 12 56.9 o 691
2007-11-08 05:58:39 C 03 54 16.50 +17 13 04.4 o 691
2007-11-19 04:21:35 C 03 31 55.70 +18 30 59.4 o 691
2007-11-19 04:46:56 C 03 31 53.33 +18 31 07.9 o 691
2007-11-19 05:12:18 C 03 31 51.19 +18 31 13.1 o 691
2016-02-05 10:23:53 C 12 45 46.72 +44 22 16.0 u H21
2016-02-05 10:35:15 C 12 45 47.10 +44 22 25.1 u H21
2016-02-05 10:53:49 C 12 45 47.64 +44 22 40.8 u H21
2018-03-28 11:36:29 C 17 32 59.38 +00 02 15.6 o 291
2018-03-28 11:42:57 C 17 33 00.19 +00 02 08.9 o 291
2018-03-28 11:49:25 C 17 33 01.02 +00 02 02.6 o 291
2018-03-29 09:20:33 C 17 35 51.75 -00 19 32.8 o 695
2018-03-29 09:33:11 C 17 35 53.36 -00 19 45.6 o 695
2018-03-29 09:45:49 C 17 35 55.00 -00 19 58.4 o 695
2018-04-04 11:35:03 C 17 55 40.00 -03 01 25.6 o 291
2018-04-04 11:45:49 C 17 55 41.42 -03 01 38.8 o 291
2018-04-04 11:59:32 C 17 55 43.27 -03 01 54.8 o 291
2020-10-10 08:07:21 C 01 54 13.14 -19 26 39.8 V G96
2020-10-10 08:14:49 C 01 54 12.50 -19 26 37.5 V G96
2020-10-10 08:22:18 C 01 54 11.75 -19 26 34.8 V G96
2020-10-10 08:29:46 C 01 54 11.13 -19 26 34.1 V G96
2020-10-16 08:37:52 C 01 41 13.111 -18 37 06.99 U F51
2020-10-16 08:52:46 C 01 41 11.744 -18 37 01.03 U F51
2020-10-16 09:07:37 C 01 41 10.389 -18 36 54.73 U F51
2020-10-16 09:22:31 C 01 41 09.011 -18 36 49.06 U F51
2022-09-24 13:22:49 C 03 53 57.837 +03 17 58.59 U F51
2022-09-24 13:42:10 C 03 53 57.470 +03 18 01.00 U F51
2022-09-24 14:01:40 C 03 53 57.119 +03 18 03.13 U F51
2022-11-01 10:44:53 C 03 03 19.129 +05 50 18.56 U F51
2022-11-01 11:03:05 C 03 03 17.523 +05 50 23.05 U F51
2022-11-01 11:21:18 C 03 03 15.930 +05 50 27.40 U F51
2022-11-01 11:39:32 C 03 03 14.348 +05 50 32.15 U F51
2024-12-03 10:28:16 C 03 40 50.215 +25 57 44.22 X F52
2024-12-03 10:43:56 C 03 40 48.873 +25 57 47.71 X F52
2024-12-03 11:15:12 C 03 40 46.167 +25 57 54.76 X F52