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
2020-02-05 10:41:36 C 15 19 22.44 +56 00 14.3 V G96
2020-02-05 10:42:58 C 15 19 22.59 +56 00 14.1 V G96
2020-02-05 10:50:51 C 15 19 23.46 +56 00 14.7 V G96
2020-02-05 10:52:14 C 15 19 23.60 +56 00 14.7 V G96
2020-02-05 10:57:39 C 15 19 24.19 +56 00 15.0 V G96
2020-02-05 10:59:02 C 15 19 24.32 +56 00 15.2 V G96
2020-02-05 13:04:14 C 15 19 37.69 +56 00 21.4 U I41
2020-02-05 13:18:08 C 15 19 39.15 +56 00 22.0 U I41
2020-02-14 11:12:58 C 15 41 08.04 +56 06 41.0 V 703
2020-02-14 11:20:44 C 15 41 08.81 +56 06 40.2 V 703
2020-02-14 11:28:31 C 15 41 09.42 +56 06 41.3 V 703
2020-02-14 11:36:17 C 15 41 09.97 +56 06 42.4 V 703
2020-02-15 14:47:49 C 15 43 35.14 +56 07 17.4 V T08
2020-02-15 14:52:28 C 15 43 35.59 +56 07 17.2 V T08
2020-02-15 15:01:05 C 15 43 36.27 +56 07 17.8 V T08
2020-02-15 15:15:56 C 15 43 37.47 +56 07 18.4 V T08
2020-02-17 10:06:23 C 15 47 17.29 +56 07 59.9 V 703
2020-02-17 10:14:14 C 15 47 17.97 +56 08 01.0 V 703
2020-02-17 10:22:05 C 15 47 18.59 +56 08 00.5 V 703
2020-02-17 10:29:56 C 15 47 19.21 +56 08 00.8 V 703
2020-02-19 12:22:33 C 15 51 19.28 +56 08 45.4 U I41
2020-02-19 13:09:31 C 15 51 22.67 +56 08 46.5 U I41
2020-02-20 12:10:53 C 15 53 08.41 +56 09 01.2 U I41
2020-02-20 12:50:47 C 15 53 11.20 +56 09 02.1 U I41
2020-02-23 14:23:34 C 15 58 23.92 +56 09 30.9 V T08
2020-02-23 14:28:22 C 15 58 24.20 +56 09 31.0 V T08
2020-02-23 14:38:17 C 15 58 24.76 +56 09 31.2 V T08
2020-02-23 14:52:37 C 15 58 25.74 +56 09 31.5 V T08
2020-02-29 11:46:44 C 16 06 34.89 +56 08 15.0 U I41
2020-02-29 12:14:37 C 16 06 36.13 +56 08 14.8 U I41
2020-02-29 12:53:27 C 16 06 37.75 +56 08 14.4 U I41
2020-02-29 12:55:27 C 16 06 37.89 +56 08 14.3 U I41
2020-03-02 13:29:12 C 16 08 51.49 +56 06 57.5 V T08
2020-03-02 13:34:00 C 16 08 51.63 +56 06 57.4 V T08
2020-03-02 13:44:14 C 16 08 52.01 +56 06 57.4 V T08
2020-03-02 14:00:05 C 16 08 52.57 +56 06 56.8 V T08
2020-03-06 14:47:15 C 16 12 18.79 +56 02 31.9 V T08
2020-03-06 14:51:54 C 16 12 18.86 +56 02 32.0 V T08
2020-03-06 14:59:21 C 16 12 19.01 +56 02 31.5 V T08
2020-03-06 15:22:33 C 16 12 19.47 +56 02 29.7 V T08
2020-03-22 01:44:19 S 16 11 35.671 +54 51 31.57 V C57
2020-03-22 01:44:19 s 1 +124102.53 2 +284910.84 4420.0 C57
2020-03-22 02:14:19 S 16 11 35.606 +54 51 20.95 V C57
2020-03-22 02:14:19 s 1 +123207.09 0 +286412.45 4500.0 C57
2020-03-22 03:14:19 S 16 11 34.068 +54 50 57.41 V C57
2020-03-22 03:14:19 s 1 +121400.56 4 +289379.14 800.0 C57
2020-03-22 04:14:19 S 16 11 32.431 +54 50 33.79 V C57
2020-03-22 04:14:19 s 1 +119573.75 9 +292297.49 5960.0 C57
2020-03-22 04:44:19 S 16 11 32.364 +54 50 21.34 V C57
2020-03-22 04:44:19 s 1 +118652.96 3 +293738.67 7110.0 C57