539940 (2017 HW1)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4585305393 ± 1.85e-08
Semi-major axis (a)2.1379494101 AU ± 2.27e-08
Inclination (i)33.93429844° ± 5.61e-06
Long. of Asc. Node (Ω)41.31082257° ± 2.15e-06
Arg. of Perihelion (ω)168.80631156° ± 8.78e-06
Mean Anomaly (M)282.85413711° ± 1.06e-05
Mean Motion (n)0.3152943146°/day ± 5.02e-09
Perihelion dist (q)1.15763431 AU ± 4.14e-08
Aphelion dist (Q)3.11826451 AU ± 5.16e-08
Orbital Period3.12605156 yr ± 4.97e-08
Physical Parameters
H (abs. magnitude)18.00
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.518″
Uncertainty0
Orbit TypeAmor
MOID0.155744 AU
Observations Used1400
Oppositions9
Arc Total2012-2025
First Observation Used2012-10-22
Last Observation Used2025-12-13
Observations (2295)
Date Type RA Dec Mag Band Observatory
2020-04-19 09:14:17 S 14 42 50.974 +38 18 09.61 V C57
2020-04-19 09:14:17 s 1 +126977.00 9 +292726.10 150.0 C57
2020-04-19 10:14:17 S 14 42 39.631 +38 14 17.99 V C57
2020-04-19 10:14:17 s 1 +125252.25 5 +295560.20 8610.0 C57
2020-04-19 21:19:36 C 14 38 48.34 +37 47 44.1 V Z80
2020-04-19 21:22:06 C 14 38 47.65 +37 47 33.3 V Z80
2020-04-19 21:24:36 C 14 38 47.09 +37 47 23.2 V Z80
2020-04-19 21:27:06 C 14 38 46.47 +37 47 12.1 V Z80
2020-04-20 08:21:32 C 14 36 08.02 +37 00 26.5 V G96
2020-04-20 08:50:38 C 14 36 00.65 +36 58 18.0 V G96
2020-04-20 08:58:11 C 14 35 58.75 +36 57 44.7 V G96
2020-04-20 09:05:43 C 14 35 56.83 +36 57 11.1 V G96
2020-04-20 10:59:56 C 14 35 30.15 +36 48 54.3 V T05
2020-04-20 11:26:59 C 14 35 23.26 +36 46 54.1 V T05
2020-04-20 12:11:51 C 14 35 11.81 +36 43 33.2 V T05
2020-04-20 13:23:24 C 14 34 53.64 +36 38 10.3 V T05
2020-04-21 05:54:46 C 14 30 55.84 +35 21 43.8 q G56
2020-04-21 06:01:22 C 14 30 54.22 +35 21 12.7 q G56
2020-04-21 06:09:48 C 14 30 52.03 +35 20 33.5 q G56
2020-04-21 11:45:23 C 14 29 27.23 +34 53 59.2 V T05
2020-04-21 11:50:45 C 14 29 25.83 +34 53 33.1 V T05
2020-04-21 11:58:45 C 14 29 23.75 +34 52 54.1 V T05
2020-04-21 12:13:34 C 14 29 19.90 +34 51 41.8 V T05
2020-04-22 11:34:34 C 14 23 31.97 +32 53 48.6 V T08
2020-04-22 11:39:29 C 14 23 30.67 +32 53 22.7 V T08
2020-04-22 11:48:51 C 14 23 28.19 +32 52 33.1 V T08
2020-04-22 12:05:22 C 14 23 23.82 +32 51 05.9 V T08
2020-04-22 23:58:22 C 14 20 25.33 +31 47 03.4 V 204
2020-04-23 00:14:43 C 14 20 21.02 +31 45 33.8 V 204
2020-04-23 00:31:01 C 14 20 16.73 +31 44 04.3 V 204
2020-04-23 00:47:20 C 14 20 12.44 +31 42 34.5 V 204
2020-04-23 01:03:40 C 14 20 08.16 +31 41 04.7 V 204
2020-04-23 08:24:32 C 14 18 16.71 +31 00 27.8 V 703
2020-04-23 08:32:07 C 14 18 14.69 +30 59 45.1 V 703
2020-04-23 08:39:41 C 14 18 12.68 +30 59 02.4 V 703
2020-04-23 08:47:17 C 14 18 10.65 +30 58 19.4 V 703
2020-04-23 16:46:08 C 14 16 09.794 +30 12 51.75 V O85
2020-04-23 16:46:57 C 14 16 09.577 +30 12 47.04 V O85
2020-04-23 20:49:53 C 14 15 08.57 +29 49 06.3 V L54
2020-04-23 21:49:26 C 14 14 52.76 +29 43 19.1 V L54
2020-04-23 21:55:35 C 14 14 51.69 +29 42 42.3 V 204
2020-04-23 22:11:07 C 14 14 46.95 +29 41 11.4 V L18
2020-04-23 22:11:19 C 14 14 47.51 +29 41 07.7 V 196
2020-04-23 22:17:24 C 14 14 45.23 +29 40 34.4 V L18
2020-04-23 22:17:58 C 14 14 45.07 +29 40 31.7 V L18
2020-04-23 22:18:32 C 14 14 44.93 +29 40 26.9 V L18
2020-04-23 22:19:06 C 14 14 44.75 +29 40 25.1 V L18
2020-04-23 22:19:41 C 14 14 44.56 +29 40 20.2 V L18
2020-04-23 22:20:15 C 14 14 44.43 +29 40 16.9 V L18
2020-04-23 22:21:58 C 14 14 43.89 +29 40 07.4 V L18