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
2020-03-28 01:44:19 s 1 -176300.95 2 +324565.45 3850.0 C57
2020-03-28 02:14:19 S 16 05 30.936 +53 57 22.79 V C57
2020-03-28 02:14:19 s 1 -177092.74 5 +323488.91 4630.0 C57
2020-03-28 02:44:19 S 16 05 28.757 +53 57 11.20 V C57
2020-03-28 02:44:19 s 1 -177880.00 7 +322403.94 2810.0 C57
2020-03-28 03:14:19 S 16 05 26.830 +53 57 01.76 V C57
2020-03-28 03:14:19 s 1 -178662.69 5 +321310.51 8340.0 C57
2020-03-28 03:44:19 S 16 05 24.502 +53 56 48.84 V C57
2020-03-28 03:44:19 s 1 -179440.76 8 +320208.61 1190.0 C57
2020-03-28 04:14:19 S 16 05 22.190 +53 56 36.60 V C57
2020-03-28 04:14:19 s 1 -180214.18 4 +319098.25 1310.0 C57
2020-03-28 04:44:19 S 16 05 20.645 +53 56 23.60 V C57
2020-03-28 04:44:19 s 1 -180982.89 9 +317979.39 8660.0 C57
2020-03-28 05:14:19 S 16 05 18.348 +53 56 11.44 V C57
2020-03-28 05:14:19 s 1 -181746.86 9 +316852.05 3220.0 C57
2020-03-28 05:44:19 S 16 05 16.253 +53 55 59.34 V C57
2020-03-28 05:44:19 s 1 -182506.05 1 +315716.19 4920.0 C57
2020-03-28 06:44:19 S 16 05 11.998 +53 55 35.44 V C57
2020-03-28 06:44:19 s 1 -184009.87 4 +313418.91 9610.0 C57
2020-03-28 07:14:19 S 16 05 09.874 +53 55 23.27 V C57
2020-03-28 07:14:19 s 1 -184754.42 4 +312257.46 2520.0 C57
2020-03-28 07:44:18 S 16 05 07.706 +53 55 10.06 V C57
2020-03-28 07:44:18 s 1 -185494.00 6 +311087.46 2400.0 C57
2020-03-28 08:14:19 S 16 05 05.443 +53 54 55.48 V C57
2020-03-28 08:14:19 s 1 -186228.57 4 +309908.90 9230.0 C57
2020-03-28 08:44:19 S 16 05 03.173 +53 54 44.60 V C57
2020-03-28 08:44:19 s 1 -186958.08 1 +308721.76 2950.0 C57
2020-03-28 09:14:18 S 16 05 01.073 +53 54 33.37 V C57
2020-03-28 09:14:18 s 1 -187682.47 9 +307526.03 3520.0 C57
2020-03-28 09:44:19 S 16 04 59.138 +53 54 19.84 V C57
2020-03-28 09:44:19 s 1 -188401.72 2 +306321.70 890.0 C57
2020-03-28 10:14:19 S 16 04 56.834 +53 54 08.21 V C57
2020-03-28 10:14:19 s 1 -189115.76 0 +305108.76 5020.0 C57
2020-03-28 10:43:58 C 16 02 56.92 +54 01 26.1 U I41
2020-03-28 10:44:18 S 16 04 54.703 +53 53 55.68 V C57
2020-03-28 10:44:18 s 1 -189824.54 6 +303887.19 5870.0 C57
2020-03-28 11:14:19 S 16 04 52.457 +53 53 44.95 V C57
2020-03-28 11:14:19 s 1 -190528.02 9 +302656.98 3380.0 C57
2020-03-28 11:23:48 C 16 02 53.57 +54 01 04.6 U I41
2020-03-28 11:27:47 C 16 02 53.26 +54 01 02.4 U I41
2020-03-28 11:44:19 S 16 04 50.237 +53 53 30.84 V C57
2020-03-28 11:44:19 s 1 -191226.16 1 +301418.12 7510.0 C57
2020-03-28 12:14:18 S 16 04 48.259 +53 53 18.85 V C57
2020-03-28 12:14:18 s 1 -191918.89 1 +300170.60 8210.0 C57
2020-03-28 12:23:43 C 16 02 48.56 +54 00 31.2 U I41
2020-03-28 12:44:19 S 16 04 45.631 +53 53 06.14 V C57
2020-03-28 12:44:19 s 1 -192606.16 7 +298914.41 5430.0 C57
2020-03-28 13:14:19 S 16 04 43.632 +53 52 50.99 V C57
2020-03-28 13:14:19 s 1 -193287.93 8 +297649.52 9130.0 C57
2020-03-28 13:44:18 S 16 04 41.820 +53 52 38.39 V C57