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
2020-04-28 22:41:15 C 13 43 29.44 +15 48 26.9 V L18
2020-04-28 23:14:06 C 13 43 20.63 +15 44 09.9 V L54
2020-04-29 06:45:32 C 13 41 24.18 +14 44 50.0 V 703
2020-04-29 06:53:09 C 13 41 22.11 +14 43 49.3 V 703
2020-04-29 07:00:46 C 13 41 20.04 +14 42 48.8 V 703
2020-04-29 07:08:23 C 13 41 17.97 +14 41 48.0 V 703
2020-04-29 18:07:44 C 13 38 28.66 +13 13 42.7 q M43
2020-04-29 18:18:31 C 13 38 25.74 +13 12 15.7 q M43
2020-04-29 18:30:02 C 13 38 22.62 +13 10 42.9 q M43
2020-04-29 18:40:27 C 13 38 19.77 +13 09 18.6 q M43
2020-04-30 07:46:56 C 13 34 55.06 +11 22 13.2 V 703
2020-04-30 07:54:37 C 13 34 53.00 +11 21 09.9 V 703
2020-04-30 08:02:18 C 13 34 50.95 +11 20 06.5 V 703
2020-04-30 08:10:00 C 13 34 48.93 +11 19 05.1 V 703
2020-04-30 09:41:05 C 13 34 26.47 +11 06 45.2 V T08
2020-04-30 09:59:34 C 13 34 21.46 +11 04 12.8 V T08
2020-04-30 10:07:02 C 13 34 19.42 +11 03 11.1 V T08
2020-04-30 10:17:41 C 13 34 16.53 +11 01 43.2 V T08
2020-04-30 21:10:18 C 13 31 30.81 +09 31 07.1 V Z80
2020-04-30 21:11:59 C 13 31 30.34 +09 30 52.9 V Z80
2020-04-30 21:13:38 C 13 31 29.91 +09 30 39.3 V Z80
2020-04-30 21:15:04 C 13 31 29.55 +09 30 27.4 V Z80
2020-04-30 22:59:09 C 13 31 01.52 +09 16 03.3 V 204
2020-04-30 23:24:36 C 13 30 54.75 +09 12 31.0 V 204
2020-04-30 23:50:51 C 13 30 47.77 +09 08 51.3 V 204
2020-05-01 00:20:45 C 13 30 39.85 +09 04 41.6 V 204
2020-05-01 00:48:40 C 13 30 32.46 +09 00 47.7 V 204
2020-05-01 09:53:32 C 13 28 14.44 +07 44 59.9 V T05
2020-05-01 09:57:33 C 13 28 13.35 +07 44 26.0 V T05
2020-05-01 10:05:31 C 13 28 11.22 +07 43 19.0 V T05
2020-05-01 10:23:40 C 13 28 06.34 +07 40 46.1 V T05
2020-05-02 01:26:11 C 13 24 20.53 +05 33 25.6 V W34
2020-05-02 01:34:43 C 13 24 18.31 +05 32 13.4 V W34
2020-05-02 01:43:39 C 13 24 15.95 +05 30 57.7 V W34
2020-05-02 01:53:55 C 13 24 13.25 +05 29 30.7 V W34
2020-05-02 09:25:16 C 13 22 17.79 +04 25 50.7 V T05
2020-05-02 09:30:04 C 13 22 16.52 +04 25 09.9 V T05
2020-05-02 10:01:56 C 13 22 08.07 +04 20 38.9 V T05
2020-05-02 10:09:30 C 13 22 06.07 +04 19 34.7 V T05
2020-05-03 07:14:34 C 13 16 53.21 +01 20 09.1 V T08
2020-05-03 07:20:32 C 13 16 51.66 +01 19 18.3 V T08
2020-05-03 07:24:31 C 13 16 50.62 +01 18 44.4 V T08
2020-05-03 07:41:50 C 13 16 46.10 +01 16 17.3 V T08
2020-05-09 02:28:10 C 12 44 40.98 -17 12 18.4 V V93
2020-05-09 03:06:07 C 12 44 32.50 -17 16 49.6 V V93
2020-05-09 03:41:53 C 12 44 24.50 -17 21 04.5 V V93
2020-05-09 04:21:01 C 12 44 15.76 -17 25 42.5 V V93
2020-05-09 15:48:06 C 12 41 52.47 -18 46 00.1 V 186
2020-05-09 15:49:41 C 12 41 52.11 -18 46 11.1 V 186
2020-05-09 15:51:16 C 12 41 51.76 -18 46 21.9 V 186