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
2020-04-12 02:44:18 S 15 20 55.025 +47 11 17.34 V C57
2020-04-12 02:44:18 s 1 -186997.94 1 +285162.23 1960.0 C57
2020-04-12 03:03:06 C 15 18 14.22 +47 15 42.8 q 557
2020-04-12 03:14:18 S 15 20 49.231 +47 10 20.57 V C57
2020-04-12 03:14:18 s 1 -187609.13 8 +283773.71 4440.0 C57
2020-04-12 03:44:18 S 15 20 43.884 +47 09 28.15 V C57
2020-04-12 03:44:18 s 1 -188214.16 6 +282375.93 2330.0 C57
2020-04-12 04:14:18 S 15 20 38.155 +47 08 28.46 V C57
2020-04-12 04:14:18 s 1 -188812.96 2 +280968.85 5570.0 C57
2020-04-12 04:44:18 S 15 20 32.676 +47 07 31.87 V C57
2020-04-12 04:44:18 s 1 -189405.46 1 +279552.46 4090.0 C57
2020-04-12 05:14:18 S 15 20 26.738 +47 06 33.84 V C57
2020-04-12 05:14:18 s 1 -189991.59 6 +278126.74 7840.0 C57
2020-04-12 05:44:18 S 15 20 21.065 +47 05 34.08 V C57
2020-04-12 05:44:18 s 1 -190571.30 1 +276691.65 6750.0 C57
2020-04-12 06:14:18 S 15 20 15.482 +47 04 38.57 V C57
2020-04-12 06:14:18 s 1 -191144.50 7 +275247.19 760.0 C57
2020-04-12 06:44:18 S 15 20 09.653 +47 03 40.57 V C57
2020-04-12 06:44:18 s 1 -191711.14 7 +273793.33 9790.0 C57
2020-04-12 07:14:18 S 15 20 03.883 +47 02 41.24 V C57
2020-04-12 07:14:18 s 1 -192271.15 0 +272330.04 3790.0 C57
2020-04-12 07:44:18 S 15 19 58.013 +47 01 42.31 V C57
2020-04-12 07:44:18 s 1 -192824.44 6 +270857.29 2690.0 C57
2020-04-12 08:14:18 S 15 19 52.322 +47 00 44.35 V C57
2020-04-12 08:14:18 s 1 -193370.96 3 +269375.08 6430.0 C57
2020-04-12 08:44:18 S 15 19 46.646 +46 59 50.24 V C57
2020-04-12 08:44:18 s 1 -193910.62 8 +267883.37 4920.0 C57
2020-04-12 09:14:18 S 15 19 41.189 +46 58 50.05 V C57
2020-04-12 09:14:18 s 1 -194443.36 7 +266382.14 8110.0 C57
2020-04-12 09:44:18 S 15 19 35.395 +46 57 53.21 V C57
2020-04-12 09:44:18 s 1 -194969.10 6 +264871.37 5920.0 C57
2020-04-12 10:14:18 S 15 19 29.446 +46 56 54.10 V C57
2020-04-12 10:14:18 s 1 -195487.76 8 +263351.03 8270.0 C57
2020-04-12 10:44:18 S 15 19 23.695 +46 55 54.34 V C57
2020-04-12 10:44:18 s 1 -195999.27 6 +261821.09 5110.0 C57
2020-04-12 11:14:18 S 15 19 17.966 +46 54 58.03 V C57
2020-04-12 11:14:18 s 1 -196503.55 3 +260281.54 6350.0 C57
2020-04-12 11:44:18 S 15 19 12.418 +46 53 59.53 V C57
2020-04-12 11:44:18 s 1 -197000.51 8 +258732.35 1920.0 C57
2020-04-12 12:14:18 S 15 19 06.499 +46 53 00.96 V C57
2020-04-12 12:14:18 s 1 -197490.09 1 +257173.48 1740.0 C57
2020-04-12 12:44:18 S 15 19 00.518 +46 52 01.45 V C57
2020-04-12 12:44:18 s 1 -197972.19 0 +255604.93 5730.0 C57
2020-04-12 13:14:18 S 15 18 54.653 +46 51 01.08 V C57
2020-04-12 13:14:18 s 1 -198446.73 2 +254026.66 3820.0 C57
2020-04-12 13:44:18 S 15 18 48.662 +46 50 00.20 V C57
2020-04-12 13:44:18 s 1 -198913.63 3 +252438.64 5930.0 C57
2020-04-12 14:14:18 S 15 18 42.806 +46 49 00.19 V C57
2020-04-12 14:14:18 s 1 -199372.80 7 +250840.86 1970.0 C57
2020-04-12 14:44:18 S 15 18 37.018 +46 48 04.68 V C57