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
2020-04-08 07:44:18 S 15 35 26.162 +49 39 36.58 – V C57
2020-04-08 07:44:18 s 1 -15242.594 0 +396977.52 2150.0 – C57
2020-04-08 08:14:18 S 15 35 21.869 +49 38 50.68 – V C57
2020-04-08 08:14:18 s 1 -16355.633 0 +397098.00 530.0 – C57
2020-04-08 08:44:18 S 15 35 17.808 +49 38 10.32 – V C57
2020-04-08 08:44:18 s 1 -17468.203 0 +397210.28 7600.0 – C57
2020-04-08 09:14:18 S 15 35 13.853 +49 37 27.66 – V C57
2020-04-08 09:14:18 s 1 -18580.283 0 +397314.38 3400.0 – C57
2020-04-08 09:44:18 S 15 35 09.451 +49 36 43.56 – V C57
2020-04-08 09:44:18 s 1 -19691.849 0 +397410.29 7950.0 – C57
2020-04-08 10:14:18 S 15 35 05.566 +49 36 03.02 – V C57
2020-04-08 10:14:18 s 1 -20802.879 0 +397498.04 1270.0 – C57
2020-04-08 10:44:18 S 15 35 01.558 +49 35 19.03 – V C57
2020-04-08 10:44:18 s 1 -21913.352 0 +397577.62 3400.0 – C57
2020-04-08 11:14:18 S 15 34 57.552 +49 34 36.08 – V C57
2020-04-08 11:14:18 s 1 -23023.246 0 +397649.05 4360.0 – C57
2020-04-08 11:44:18 S 15 34 53.482 +49 33 54.83 – V C57
2020-04-08 11:44:18 s 1 -24132.538 0 +397712.33 4170.0 – C57
2020-04-08 12:14:18 S 15 34 48.967 +49 33 10.66 – V C57
2020-04-08 12:14:18 s 1 -25241.207 0 +397767.46 2870.0 – C57
2020-04-08 12:44:18 S 15 34 45.115 +49 32 28.32 – V C57
2020-04-08 12:44:18 s 1 -26349.232 0 +397814.46 470.0 – C57
2020-04-08 13:14:18 S 15 34 40.781 +49 31 46.16 – V C57
2020-04-08 13:14:18 s 1 -27456.589 0 +397853.33 7010.0 – C57
2020-04-08 13:44:18 S 15 34 36.917 +49 31 03.25 – V C57
2020-04-08 13:44:18 s 1 -28563.258 0 +397884.08 2500.0 – C57
2020-04-08 14:14:18 S 15 34 32.628 +49 30 19.87 – V C57
2020-04-08 14:14:18 s 1 -29669.216 0 +397906.71 6990.0 – C57
2020-04-08 14:44:18 S 15 34 28.531 +49 29 35.56 – V C57
2020-04-08 14:44:18 s 1 -30774.443 0 +397921.23 480.0 – C57
2020-04-08 15:14:18 S 15 34 24.456 +49 28 52.32 – V C57
2020-04-08 15:14:18 s 1 -31878.916 0 +397927.65 3020.0 – C57
2020-04-08 15:44:18 S 15 34 20.076 +49 28 10.24 – V C57
2020-04-08 15:44:18 s 1 -32982.614 0 +397925.97 4620.0 – C57
2020-04-08 16:14:18 S 15 34 15.938 +49 27 29.02 – V C57
2020-04-08 16:14:18 s 1 -34085.514 0 +397916.20 5310.0 – C57
2020-04-08 16:44:18 S 15 34 11.933 +49 26 42.47 – V C57
2020-04-08 16:44:18 s 1 -35187.596 0 +397898.34 5120.0 – C57
2020-04-08 17:14:18 S 15 34 07.236 +49 26 00.28 – V C57
2020-04-08 17:14:18 s 1 -36288.839 0 +397872.40 4060.0 – C57
2020-04-08 18:44:18 S 15 33 54.847 +49 23 48.12 – V C57
2020-04-08 18:44:18 s 1 -39587.309 0 +397746.14 6020.0 – C57
2020-04-08 19:14:18 S 15 33 50.568 +49 23 06.50 – V C57
2020-04-08 19:14:18 s 1 -40684.976 0 +397687.92 1790.0 – C57
2020-04-08 19:44:18 S 15 33 46.224 +49 22 21.18 – V C57
2020-04-08 19:44:18 s 1 -41781.695 0 +397621.65 6830.0 – C57
2020-04-08 20:14:18 S 15 33 42.170 +49 21 38.23 – V C57
2020-04-08 20:14:18 s 1 -42877.445 0 +397547.33 1160.0 – C57
2020-04-08 20:44:18 S 15 33 37.906 +49 20 54.89 – V C57
2020-04-08 20:44:18 s 1 -43972.204 0 +397464.96 4820.0 – C57