IAA RAS IAA Minor Planet Database

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
2020-04-05 21:14:18 S 15 42 36.833 +50 56 22.85 – V C57
2020-04-05 21:14:18 s 1 +111136.82 7 +322713.68 5340.0 – C57
2020-04-05 21:44:18 S 15 42 33.838 +50 55 48.11 – V C57
2020-04-05 21:44:18 s 1 +110161.70 2 +323897.51 580.0 – C57
2020-04-05 22:14:18 S 15 42 30.182 +50 55 07.82 – V C57
2020-04-05 22:14:18 s 1 +109183.16 1 +325070.86 9850.0 – C57
2020-04-05 22:44:18 S 15 42 26.933 +50 54 31.25 – V C57
2020-04-05 22:44:18 s 1 +108201.26 2 +326233.76 3200.0 – C57
2020-04-05 23:14:18 S 15 42 23.722 +50 53 54.64 – V C57
2020-04-05 23:14:18 s 1 +107216.06 0 +327386.26 700.0 – C57
2020-04-06 00:14:18 S 15 42 16.786 +50 52 37.63 – V C57
2020-04-06 00:14:18 s 1 +105235.96 5 +329660.17 8410.0 – C57
2020-04-06 00:44:18 S 15 42 13.632 +50 52 03.29 – V C57
2020-04-06 00:44:18 s 1 +104241.17 8 +330781.64 8750.0 – C57
2020-04-06 01:44:18 S 15 42 06.818 +50 50 47.51 – V C57
2020-04-06 01:44:18 s 1 +102242.39 1 +332993.80 2690.0 – C57
2020-04-06 02:14:18 S 15 42 03.449 +50 50 12.26 – V C57
2020-04-06 02:14:18 s 1 +101238.49 4 +334084.55 6420.0 – C57
2020-04-06 02:44:18 S 15 42 00.106 +50 49 33.02 – V C57
2020-04-06 02:44:18 s 1 +100231.66 2 +335165.13 4720.0 – C57
2020-04-06 03:14:18 S 15 41 56.563 +50 48 54.68 – V C57
2020-04-06 03:14:18 s 1 +99221.945 0 +336235.55 7670.0 – C57
2020-04-06 03:44:18 S 15 41 53.014 +50 48 17.89 – V C57
2020-04-06 03:44:18 s 1 +98209.393 0 +337295.87 5320.0 – C57
2020-04-06 04:14:18 S 15 41 49.870 +50 47 43.94 – V C57
2020-04-06 04:14:18 s 1 +97194.054 0 +338346.09 7730.0 – C57
2020-04-06 04:44:18 S 15 41 46.332 +50 47 05.96 – V C57
2020-04-06 04:44:18 s 1 +96175.976 0 +339386.27 4950.0 – C57
2020-04-06 05:14:18 S 15 41 42.814 +50 46 25.32 – V C57
2020-04-06 05:14:18 s 1 +95155.208 0 +340416.42 7040.0 – C57
2020-04-06 05:44:18 S 15 41 39.389 +50 45 49.36 – V C57
2020-04-06 05:44:18 s 1 +94131.795 0 +341436.58 4060.0 – C57
2020-04-06 06:14:18 S 15 41 35.995 +50 45 11.02 – V C57
2020-04-06 06:14:18 s 1 +93105.786 0 +342446.78 6060.0 – C57
2020-04-06 06:44:18 S 15 41 32.698 +50 44 32.39 – V C57
2020-04-06 06:44:18 s 1 +92077.225 0 +343447.05 3090.0 – C57
2020-04-06 07:14:18 S 15 41 29.347 +50 43 55.20 – V C57
2020-04-06 07:14:18 s 1 +91046.159 0 +344437.41 5220.0 – C57
2020-04-06 07:39:19 C 15 40 33.36 +51 02 04.5 – u H21
2020-04-06 07:41:58 C 15 40 32.97 +51 02 01.1 – u H21
2020-04-06 07:44:29 C 15 40 32.61 +51 01 58.1 – u H21
2020-04-06 07:47:00 C 15 40 32.24 +51 01 55.1 – u H21
2020-04-06 07:49:31 C 15 40 31.88 +51 01 51.9 – u H21
2020-04-06 07:52:02 C 15 40 31.50 +51 01 48.9 – u H21
2020-04-06 07:54:33 C 15 40 31.13 +51 01 45.9 – u H21
2020-04-06 07:57:05 C 15 40 30.76 +51 01 42.8 – u H21
2020-04-06 07:59:36 C 15 40 30.39 +51 01 39.6 – u H21
2020-04-06 08:02:07 C 15 40 30.02 +51 01 36.6 – u H21
2020-04-06 08:04:38 C 15 40 29.65 +51 01 33.7 – u H21
2020-04-06 08:07:09 C 15 40 29.28 +51 01 30.4 – u H21