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
2020-04-11 05:44:18 S 15 24 41.918 +47 49 39.11 – V C57
2020-04-11 05:44:18 s 1 -156497.64 5 +335368.40 3910.0 – C57
2020-04-11 06:14:18 S 15 24 36.518 +47 48 44.93 – V C57
2020-04-11 06:14:18 s 1 -157319.39 7 +334352.18 3100.0 – C57
2020-04-11 06:44:18 S 15 24 31.327 +47 47 50.96 – V C57
2020-04-11 06:44:18 s 1 -158137.07 0 +333327.42 9690.0 – C57
2020-04-11 07:44:18 S 15 24 21.286 +47 46 08.98 – V C57
2020-04-11 07:44:18 s 1 -159760.02 0 +331252.26 4930.0 – C57
2020-04-11 08:14:18 S 15 24 15.547 +47 45 10.91 – V C57
2020-04-11 08:14:18 s 1 -160565.21 8 +330201.82 3500.0 – C57
2020-04-11 08:44:18 S 15 24 10.495 +47 44 19.03 – V C57
2020-04-11 08:44:18 s 1 -161366.17 7 +329142.78 9330.0 – C57
2020-04-11 08:59:53 C 15 21 30.37 +47 52 25.6 – V G96
2020-04-11 09:08:08 C 15 21 28.82 +47 52 09.6 – V G96
2020-04-11 09:14:18 S 15 24 05.242 +47 43 28.38 – V C57
2020-04-11 09:14:18 s 1 -162162.85 7 +328075.15 2360.0 – C57
2020-04-11 09:16:36 C 15 21 27.22 +47 51 53.1 – V G96
2020-04-11 09:25:38 C 15 21 25.53 +47 51 35.4 – V G96
2020-04-11 09:44:18 S 15 24 00.050 +47 42 35.17 – V C57
2020-04-11 09:44:18 s 1 -162955.21 7 +326998.90 2560.0 – C57
2020-04-11 10:14:18 S 15 23 54.816 +47 41 42.22 – V C57
2020-04-11 10:14:18 s 1 -163743.21 4 +325914.01 9890.0 – C57
2020-04-11 10:44:18 S 15 23 49.296 +47 40 43.07 – V C57
2020-04-11 10:44:18 s 1 -164526.80 7 +324820.47 4310.0 – C57
2020-04-11 11:14:18 S 15 23 44.174 +47 39 52.06 – V C57
2020-04-11 11:14:18 s 1 -165305.95 4 +323718.27 5780.0 – C57
2020-04-11 11:44:18 S 15 23 38.966 +47 38 59.17 – V C57
2020-04-11 11:44:18 s 1 -166080.61 1 +322607.40 4260.0 – C57
2020-04-11 11:57:55 C 15 20 58.82 +47 46 42.2 – V T08
2020-04-11 12:01:57 C 15 20 58.04 +47 46 34.1 – V T08
2020-04-11 12:06:39 C 15 20 57.17 +47 46 24.9 – V T08
2020-04-11 12:07:18 C 15 20 57.04 +47 46 23.6 – V T08
2020-04-11 12:14:18 S 15 23 33.362 +47 38 03.73 – V C57
2020-04-11 12:14:18 s 1 -166850.73 5 +321487.83 9700.0 – C57
2020-04-11 12:16:27 C 15 20 55.30 +47 46 05.4 – V T08
2020-04-11 12:21:56 C 15 20 54.26 +47 45 54.6 – V T08
2020-04-11 12:34:24 C 15 20 51.88 +47 45 29.9 – V T08
2020-04-11 12:44:18 S 15 23 27.996 +47 37 11.35 – V C57
2020-04-11 12:44:18 s 1 -167616.28 1 +320359.54 2060.0 – C57
2020-04-11 13:14:18 S 15 23 23.021 +47 36 19.33 – V C57
2020-04-11 13:14:18 s 1 -168377.20 6 +319222.54 1300.0 – C57
2020-04-11 13:44:18 S 15 23 17.568 +47 35 25.66 – V C57
2020-04-11 13:44:18 s 1 -169133.46 5 +318076.79 7380.0 – C57
2020-04-11 14:14:18 S 15 23 12.178 +47 34 29.57 – V C57
2020-04-11 14:14:18 s 1 -169885.01 2 +316922.29 250.0 – C57
2020-04-11 14:44:18 S 15 23 06.749 +47 33 33.88 – V C57
2020-04-11 14:44:18 s 1 -170631.80 1 +315759.01 9870.0 – C57
2020-04-11 15:14:18 S 15 23 01.366 +47 32 40.67 – V C57
2020-04-11 15:14:18 s 1 -171373.78 6 +314586.94 6200.0 – C57
2020-04-11 15:44:18 S 15 22 55.738 +47 31 42.53 – V C57