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
2020-04-10 02:44:18 S 15 29 09.091 +48 34 57.36 V C57
2020-04-10 02:44:18 s 1 -107020.45 4 +377876.40 8670.0 C57
2020-04-10 03:14:18 S 15 29 04.442 +48 34 10.49 V C57
2020-04-10 03:14:18 s 1 -108013.07 7 +377305.74 8810.0 C57
2020-04-10 03:44:18 S 15 28 59.616 +48 33 19.62 V C57
2020-04-10 03:44:18 s 1 -109003.30 0 +376727.03 8040.0 C57
2020-04-10 04:14:18 S 15 28 54.806 +48 32 31.85 V C57
2020-04-10 04:14:18 s 1 -109991.09 8 +376140.25 6350.0 C57
2020-04-10 04:44:18 S 15 28 50.448 +48 31 46.88 V C57
2020-04-10 04:44:18 s 1 -110976.44 6 +375545.41 3710.0 C57
2020-04-10 05:14:18 S 15 28 45.871 +48 30 57.10 V C57
2020-04-10 05:14:18 s 1 -111959.31 6 +374942.50 80.0 C57
2020-04-10 05:44:18 S 15 28 40.466 +48 30 03.17 V C57
2020-04-10 05:44:18 s 1 -112939.68 4 +374331.51 5450.0 C57
2020-04-10 06:14:18 S 15 28 35.801 +48 29 19.21 V C57
2020-04-10 06:14:18 s 1 -113917.52 3 +373712.44 9780.0 C57
2020-04-10 06:44:18 S 15 28 31.183 +48 28 28.88 V C57
2020-04-10 06:44:18 s 1 -114892.80 8 +373085.29 3040.0 C57
2020-04-10 07:14:18 S 15 28 26.657 +48 27 42.30 V C57
2020-04-10 07:14:18 s 1 -115865.51 0 +372450.05 5210.0 C57
2020-04-10 07:44:18 S 15 28 21.209 +48 26 48.44 V C57
2020-04-10 07:44:18 s 1 -116835.60 4 +371806.71 6270.0 C57
2020-04-10 08:14:18 S 15 28 16.702 +48 26 01.10 V C57
2020-04-10 08:14:18 s 1 -117803.06 4 +371155.26 6170.0 C57
2020-04-10 08:44:18 S 15 28 11.578 +48 25 08.80 V C57
2020-04-10 08:44:18 s 1 -118767.86 1 +370495.71 4900.0 C57
2020-04-10 09:13:04 C 15 25 37.15 +48 36 50.5 V 703
2020-04-10 09:38:22 C 15 25 32.50 +48 36 05.2 V 703
2020-04-10 09:44:18 S 15 28 02.131 +48 23 34.94 V C57
2020-04-10 09:44:18 s 1 -120689.36 1 +369152.25 8720.0 C57
2020-04-10 10:14:18 S 15 27 57.396 +48 22 45.95 V C57
2020-04-10 10:14:18 s 1 -121646.00 9 +368468.33 3760.0 C57
2020-04-10 10:44:18 S 15 27 52.730 +48 21 57.49 V C57
2020-04-10 10:44:18 s 1 -122599.88 5 +367776.28 7500.0 C57
2020-04-10 11:14:18 S 15 27 47.618 +48 21 06.80 V C57
2020-04-10 11:14:18 s 1 -123550.96 1 +367076.08 9930.0 C57
2020-04-10 11:44:18 S 15 27 42.574 +48 20 17.59 V C57
2020-04-10 11:44:18 s 1 -124499.21 0 +366367.74 1000.0 C57
2020-04-10 12:14:18 S 15 27 38.038 +48 19 31.04 V C57
2020-04-10 12:14:18 s 1 -125444.60 4 +365651.24 710.0 C57
2020-04-10 12:44:18 S 15 27 33.151 +48 18 40.14 V C57
2020-04-10 12:44:18 s 1 -126387.11 2 +364926.58 9000.0 C57
2020-04-10 13:14:18 S 15 27 28.075 +48 17 48.73 V C57
2020-04-10 13:14:18 s 1 -127326.70 8 +364193.75 5870.0 C57
2020-04-10 13:44:18 S 15 27 23.189 +48 16 58.98 V C57
2020-04-10 13:44:18 s 1 -128263.36 2 +363452.73 1260.0 C57
2020-04-10 14:14:18 S 15 27 18.420 +48 16 08.65 V C57
2020-04-10 14:14:18 s 1 -129197.04 5 +362703.54 5170.0 C57
2020-04-10 14:44:18 S 15 27 13.080 +48 15 16.78 V C57
2020-04-10 14:44:18 s 1 -130127.72 7 +361946.15 7550.0 C57