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
2020-03-31 13:44:18 s 1 -184144.59 4 +16013.910 5130.0 C57
2020-03-31 22:29:11 C 15 55 43.97 +53 07 18.2 V Z80
2020-03-31 22:34:11 C 15 55 43.45 +53 07 14.7 V Z80
2020-03-31 22:39:10 C 15 55 42.91 +53 07 11.4 V Z80
2020-03-31 22:44:11 C 15 55 42.44 +53 07 07.8 V Z80
2020-04-03 09:10:08 C 15 49 27.51 +52 18 07.1 V 703
2020-04-03 09:17:58 C 15 49 26.55 +52 17 59.8 V 703
2020-04-03 09:25:50 C 15 49 25.53 +52 17 52.1 V 703
2020-04-03 09:33:42 C 15 49 24.61 +52 17 45.4 V 703
2020-04-03 11:44:18 S 15 48 30.934 +52 05 31.63 V C57
2020-04-03 11:44:18 s 1 +175163.25 1 +104763.68 8910.0 C57
2020-04-03 12:41:51 C 15 49 02.70 +52 14 52.3 V T08
2020-04-03 12:47:09 C 15 49 02.08 +52 14 46.9 V T08
2020-04-03 12:59:59 C 15 49 00.39 +52 14 35.3 V T08
2020-04-03 13:41:34 C 15 48 55.08 +52 13 55.5 V T08
2020-04-03 18:14:18 S 15 47 52.944 +51 57 41.76 V C57
2020-04-03 18:14:18 s 1 +176352.48 6 +138744.21 4110.0 C57
2020-04-03 20:14:18 S 15 47 41.227 +51 55 22.37 V C57
2020-04-03 20:14:18 s 1 +175997.96 5 +148663.77 5400.0 C57
2020-04-03 20:44:18 S 15 47 38.417 +51 54 45.00 V C57
2020-04-03 20:44:18 s 1 +175862.65 4 +151104.65 9440.0 C57
2020-04-03 21:14:18 S 15 47 34.927 +51 54 07.78 V C57
2020-04-03 21:14:18 s 1 +175709.40 9 +153530.00 1740.0 C57
2020-04-03 21:44:18 S 15 47 32.330 +51 53 33.94 V C57
2020-04-03 21:44:18 s 1 +175538.58 2 +155939.87 2640.0 C57
2020-04-03 22:14:18 S 15 47 29.628 +51 52 54.55 V C57
2020-04-03 22:14:18 s 1 +175350.51 7 +158334.31 2510.0 C57
2020-04-03 23:14:18 S 15 47 23.280 +51 51 46.73 V C57
2020-04-03 23:14:18 s 1 +174924.00 5 +163077.10 540.0 C57
2020-04-03 23:44:18 S 15 47 19.951 +51 51 06.08 V C57
2020-04-03 23:44:18 s 1 +174686.20 4 +165425.54 9370.0 C57
2020-04-04 00:14:18 S 15 47 17.318 +51 50 31.02 V C57
2020-04-04 00:14:18 s 1 +174432.45 6 +167758.76 8520.0 C57
2020-04-04 00:44:18 S 15 47 14.462 +51 49 55.09 V C57
2020-04-04 00:44:18 s 1 +174163.06 7 +170076.80 8290.0 C57
2020-04-04 01:14:18 S 15 47 11.882 +51 49 23.66 V C57
2020-04-04 01:14:18 s 1 +173878.33 0 +172379.73 9010.0 C57
2020-04-04 01:44:18 S 15 47 08.304 +51 48 44.60 V C57
2020-04-04 01:44:18 s 1 +173578.53 6 +174667.60 960.0 C57
2020-04-04 02:14:18 S 15 47 05.676 +51 48 09.72 V C57
2020-04-04 02:14:18 s 1 +173263.96 7 +176940.46 4460.0 C57
2020-04-04 02:44:18 S 15 47 02.822 +51 47 34.58 V C57
2020-04-04 02:44:18 s 1 +172934.89 7 +179198.38 9780.0 C57
2020-04-04 03:14:18 S 15 47 00.060 +51 46 57.14 V C57
2020-04-04 03:14:18 s 1 +172591.59 6 +181441.42 7220.0 C57
2020-04-04 03:44:18 S 15 46 56.614 +51 46 21.86 V C57
2020-04-04 03:44:18 s 1 +172234.32 7 +183669.62 7050.0 C57
2020-04-04 04:14:18 S 15 46 53.657 +51 45 46.58 V C57
2020-04-04 04:14:18 s 1 +171863.34 5 +185883.06 9540.0 C57
2020-04-04 04:44:18 S 15 46 50.870 +51 45 11.02 V C57