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
2020-04-06 08:11:26 C 15 40 28.69 +51 01 25.2 – u H21
2020-04-06 08:14:18 S 15 41 22.303 +50 42 39.71 – V C57
2020-04-06 08:14:18 s 1 +88976.686 0 +346388.53 4950.0 – C57
2020-04-06 08:44:18 S 15 41 19.051 +50 42 04.90 – V C57
2020-04-06 08:44:18 s 1 +87938.369 0 +347349.35 2650.0 – C57
2020-04-06 09:14:18 S 15 41 15.420 +50 41 24.25 – V C57
2020-04-06 09:14:18 s 1 +86897.723 0 +348300.38 5660.0 – C57
2020-04-06 09:44:18 S 15 41 12.070 +50 40 48.68 – V C57
2020-04-06 09:44:18 s 1 +85854.790 0 +349241.65 4020.0 – C57
2020-04-06 10:14:18 S 15 41 08.208 +50 40 08.00 – V C57
2020-04-06 10:14:18 s 1 +84809.613 0 +350173.19 7780.0 – C57
2020-04-06 10:35:22 C 15 40 08.31 +50 58 30.1 – V 703
2020-04-06 10:43:28 C 15 40 07.06 +50 58 19.7 – V 703
2020-04-06 10:44:18 S 15 41 04.699 +50 39 28.30 – V C57
2020-04-06 10:44:18 s 1 +83762.234 0 +351095.01 6990.0 – C57
2020-04-06 10:51:35 C 15 40 05.90 +50 58 09.5 – V 703
2020-04-06 10:59:42 C 15 40 04.64 +50 57 59.5 – V 703
2020-04-06 11:14:18 S 15 41 01.819 +50 38 54.92 – V C57
2020-04-06 11:14:18 s 1 +82712.694 0 +352007.15 1700.0 – C57
2020-04-06 12:14:18 S 15 40 54.410 +50 37 36.48 – V C57
2020-04-06 12:14:18 s 1 +80607.296 0 +353802.50 7810.0 – C57
2020-04-06 12:44:18 S 15 40 50.971 +50 36 58.86 – V C57
2020-04-06 12:44:18 s 1 +79551.519 0 +354685.75 9320.0 – C57
2020-04-06 13:14:18 S 15 40 47.429 +50 36 21.10 – V C57
2020-04-06 13:14:18 s 1 +78493.742 0 +355559.43 6510.0 – C57
2020-04-06 13:44:18 S 15 40 44.201 +50 35 44.41 – V C57
2020-04-06 13:44:18 s 1 +77434.006 0 +356423.56 9450.0 – C57
2020-04-06 14:14:18 S 15 40 40.414 +50 35 03.70 – V C57
2020-04-06 14:14:18 s 1 +76372.349 0 +357278.16 8170.0 – C57
2020-04-06 14:44:18 S 15 40 37.130 +50 34 29.68 – V C57
2020-04-06 14:44:18 s 1 +75308.810 0 +358123.26 2730.0 – C57
2020-04-06 15:14:18 S 15 40 33.698 +50 33 51.70 – V C57
2020-04-06 15:14:18 s 1 +74243.426 0 +358958.88 3160.0 – C57
2020-04-06 15:44:18 S 15 40 29.630 +50 33 09.79 – V C57
2020-04-06 15:44:18 s 1 +73176.236 0 +359785.05 9520.0 – C57
2020-04-06 16:14:18 S 15 40 26.023 +50 32 30.44 – V C57
2020-04-06 16:14:18 s 1 +72107.277 0 +360601.79 1850.0 – C57
2020-04-06 16:44:18 S 15 40 22.874 +50 31 55.60 – V C57
2020-04-06 16:44:18 s 1 +71036.586 0 +361409.12 190.0 – C57
2020-04-06 17:14:18 S 15 40 19.210 +50 31 15.89 – V C57
2020-04-06 17:14:18 s 1 +69964.199 0 +362207.07 4590.0 – C57
2020-04-06 17:44:18 S 15 40 15.590 +50 30 35.50 – V C57
2020-04-06 17:44:18 s 1 +68890.153 0 +362995.67 5090.0 – C57
2020-04-06 18:14:18 S 15 40 11.846 +50 29 57.62 – V C57
2020-04-06 18:14:18 s 1 +67814.483 0 +363774.93 1730.0 – C57
2020-04-06 18:44:18 S 15 40 08.378 +50 29 19.64 – V C57
2020-04-06 18:44:18 s 1 +66737.226 0 +364544.87 4560.0 – C57
2020-04-06 19:14:18 S 15 40 04.764 +50 28 41.12 – V C57
2020-04-06 19:14:18 s 1 +65658.416 0 +365305.53 3630.0 – C57
2020-04-06 19:44:18 S 15 40 01.330 +50 28 02.50 – V C57