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
2020-04-13 01:44:18 S 15 16 24.451 +46 25 43.28 V C57
2020-04-13 01:44:18 s 1 -207581.91 0 +211333.83 9720.0 C57
2020-04-13 01:54:21 C 15 13 58.71 +46 25 43.0 q 557
2020-04-13 02:14:18 S 15 16 18.233 +46 24 42.41 V C57
2020-04-13 02:14:18 s 1 -207825.95 2 +209493.46 2100.0 C57
2020-04-13 02:44:18 S 15 16 12.043 +46 23 39.30 V C57
2020-04-13 02:44:18 s 1 -208059.60 0 +207642.62 5890.0 C57
2020-04-13 02:54:29 C 15 13 46.78 +46 23 23.6 q 557
2020-04-13 03:14:18 S 15 16 06.132 +46 22 35.98 V C57
2020-04-13 03:14:18 s 1 -208282.72 2 +205781.29 950.0 C57
2020-04-13 03:44:18 S 15 16 00.127 +46 21 35.50 V C57
2020-04-13 03:44:18 s 1 -208495.18 2 +203909.45 7170.0 C57
2020-04-13 04:14:18 S 15 15 53.837 +46 20 33.11 V C57
2020-04-13 04:14:18 s 1 -208696.84 4 +202027.06 4400.0 C57
2020-04-13 04:44:18 S 15 15 47.515 +46 19 27.77 V C57
2020-04-13 04:44:18 s 1 -208887.56 6 +200134.10 2520.0 C57
2020-04-13 05:14:18 S 15 15 41.220 +46 18 27.58 V C57
2020-04-13 05:14:18 s 1 -209067.20 6 +198230.54 1380.0 C57
2020-04-13 05:44:18 S 15 15 34.985 +46 17 22.02 V C57
2020-04-13 05:44:18 s 1 -209235.61 9 +196316.35 850.0 C57
2020-04-13 06:14:18 S 15 15 28.553 +46 16 18.01 V C57
2020-04-13 06:14:18 s 1 -209392.65 7 +194391.50 790.0 C57
2020-04-13 06:44:18 S 15 15 22.555 +46 15 15.37 V C57
2020-04-13 06:44:18 s 1 -209538.16 8 +192455.96 1050.0 C57
2020-04-13 07:14:18 S 15 15 16.162 +46 14 12.98 V C57
2020-04-13 07:14:18 s 1 -209671.99 9 +190509.70 1480.0 C57
2020-04-13 07:44:18 S 15 15 09.838 +46 13 09.62 V C57
2020-04-13 07:44:18 s 1 -209793.99 2 +188552.71 1940.0 C57
2020-04-13 08:14:18 S 15 15 03.734 +46 12 06.05 V C57
2020-04-13 08:14:18 s 1 -209903.98 8 +186584.94 2260.0 C57
2020-04-13 08:44:18 S 15 14 57.173 +46 11 01.46 V C57
2020-04-13 08:44:18 s 1 -210001.82 3 +184606.38 2300.0 C57
2020-04-13 09:14:18 S 15 14 50.688 +46 09 54.18 V C57
2020-04-13 09:14:18 s 1 -210087.33 2 +182616.99 1880.0 C57
2020-04-13 09:44:18 S 15 14 44.424 +46 08 53.16 V C57
2020-04-13 09:44:18 s 1 -210160.34 3 +180616.75 860.0 C57
2020-04-13 10:14:18 S 15 14 38.273 +46 07 50.20 V C57
2020-04-13 10:14:18 s 1 -210220.68 4 +178605.63 9050.0 C57
2020-04-13 10:44:18 S 15 14 31.570 +46 06 41.80 V C57
2020-04-13 10:44:18 s 1 -210268.17 9 +176583.60 6300.0 C57
2020-04-13 11:14:18 S 15 14 24.989 +46 05 36.78 V C57
2020-04-13 11:14:18 s 1 -210302.64 6 +174550.65 2420.0 C57
2020-04-13 11:44:18 S 15 14 19.008 +46 04 40.91 V C57
2020-04-13 11:44:18 s 1 -210323.90 2 +172506.74 7240.0 C57
2020-04-13 12:14:18 S 15 14 12.262 +46 03 25.45 V C57
2020-04-13 12:14:18 s 1 -210331.75 9 +170451.85 580.0 C57
2020-04-13 12:44:18 S 15 14 05.894 +46 02 24.22 V C57
2020-04-13 12:44:18 s 1 -210326.02 6 +168385.96 2250.0 C57
2020-04-13 13:14:18 S 15 13 59.398 +46 01 18.41 V C57
2020-04-13 13:14:18 s 1 -210306.50 5 +166309.03 2050.0 C57