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
2020-04-15 07:44:18 S 15 03 43.466 +44 17 13.38 V C57
2020-04-15 07:44:18 s 1 -119776.45 1 -45225.793 8320.0 C57
2020-04-15 08:37:38 C 15 03 05.35 +44 06 42.1 V 703
2020-04-15 08:46:00 C 15 03 03.52 +44 06 18.4 V 703
2020-04-15 08:54:26 C 15 03 01.68 +44 05 54.9 V 703
2020-04-15 09:02:54 C 15 02 59.88 +44 05 31.2 V 703
2020-04-15 12:51:10 C 15 02 11.54 +43 54 48.3 V T08
2020-04-15 12:55:29 C 15 02 10.58 +43 54 35.8 V T08
2020-04-15 13:03:41 C 15 02 08.76 +43 54 12.2 V T08
2020-04-15 13:20:46 C 15 02 04.98 +43 53 22.6 V T08
2020-04-15 19:30:49 C 15 00 50.32 +43 35 00.4 q 557
2020-04-15 20:31:11 C 15 00 37.36 +43 32 06.6 q 557
2020-04-15 20:32:26 C 15 00 36.96 +43 32 05.9 V L54
2020-04-15 21:11:40 C 15 00 28.47 +43 30 13.1 V L54
2020-04-15 21:31:07 C 15 00 24.34 +43 29 12.7 q 557
2020-04-15 21:52:03 C 15 00 19.60 +43 28 15.9 V L54
2020-04-15 22:29:41 C 15 00 11.50 +43 26 21.5 q 557
2020-04-15 23:30:54 C 14 59 57.98 +43 23 20.2 q 557
2020-04-16 00:31:20 C 14 59 44.59 +43 20 19.9 q 557
2020-04-16 01:28:09 C 14 59 31.98 +43 17 29.2 q 557
2020-04-16 02:27:47 C 14 59 18.76 +43 14 28.1 q 557
2020-04-16 19:14:18 C 14 55 44.60 +42 22 02.6 q 557
2020-04-16 20:15:45 C 14 55 30.99 +42 18 48.8 q 557
2020-04-16 22:12:12 C 14 55 04.75 +42 12 37.0 q 557
2020-04-16 23:13:10 C 14 54 50.89 +42 09 20.5 q 557
2020-04-17 00:12:50 C 14 54 37.23 +42 06 05.9 q 557
2020-04-17 01:15:12 C 14 54 22.92 +42 02 40.2 q 557
2020-04-17 02:15:27 C 14 54 09.16 +41 59 20.4 q 557
2020-04-17 11:20:44 C 14 52 09.51 +41 29 09.3 V T05
2020-04-17 11:29:11 C 14 52 07.51 +41 28 40.5 V T05
2020-04-17 11:33:49 C 14 52 06.42 +41 28 24.7 V T05
2020-04-17 11:48:21 C 14 52 02.97 +41 27 34.9 V T05
2020-04-17 11:50:19 C 14 52 02.53 +41 27 28.1 V T05
2020-04-17 11:54:39 C 14 52 01.49 +41 27 13.3 V T05
2020-04-17 12:16:48 C 14 51 56.25 +41 25 57.4 V T05
2020-04-17 13:04:36 C 14 51 44.98 +41 23 11.7 V T05
2020-04-17 21:42:42 C 14 49 50.66 +40 52 43.6 V L18
2020-04-17 21:46:03 C 14 49 49.83 +40 52 31.4 V L18
2020-04-17 21:49:24 C 14 49 49.05 +40 52 20.3 V L18
2020-04-17 21:52:46 C 14 49 48.31 +40 52 09.0 V L18
2020-04-17 21:56:07 C 14 49 47.50 +40 51 56.9 V L18
2020-04-17 22:02:49 C 14 49 45.92 +40 51 32.9 V L18
2020-04-17 22:06:10 C 14 49 45.20 +40 51 20.8 V L18
2020-04-17 22:09:31 C 14 49 44.45 +40 51 09.1 V L18
2020-04-18 08:29:59 C 14 47 22.53 +40 13 50.2 V 703
2020-04-18 08:39:03 C 14 47 20.37 +40 13 17.1 V 703
2020-04-18 08:47:42 C 14 47 18.26 +40 12 44.6 V 703
2020-04-18 08:56:03 C 14 47 16.26 +40 12 13.7 V 703
2020-04-18 14:44:17 S 14 46 33.010 +39 31 39.36 V C57
2020-04-18 14:44:17 s 1 +154482.40 4 +231459.44 3280.0 C57