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
2020-04-05 07:14:18 S 15 44 07.886 +51 13 26.51 V C57
2020-04-05 07:14:18 s 1 +136799.66 7 +285160.11 6410.0 C57
2020-04-05 07:44:18 S 15 44 04.966 +51 12 53.21 V C57
2020-04-05 07:44:18 s 1 +135946.46 0 +286652.91 9470.0 C57
2020-04-05 08:14:18 S 15 44 01.850 +51 12 14.40 V C57
2020-04-05 08:14:18 s 1 +135087.89 7 +288134.12 4310.0 C57
2020-04-05 08:44:18 S 15 43 58.822 +51 11 39.55 V C57
2020-04-05 08:44:18 s 1 +134224.06 1 +289603.76 1040.0 C57
2020-04-05 09:14:18 S 15 43 55.058 +51 11 04.56 V C57
2020-04-05 09:14:18 s 1 +133355.03 5 +291061.89 9740.0 C57
2020-04-05 09:36:41 C 15 43 30.16 +51 28 07.1 V G96
2020-04-05 09:44:18 S 15 43 51.996 +51 10 27.84 V C57
2020-04-05 09:44:18 s 1 +132480.90 2 +292508.55 520.0 C57
2020-04-05 09:44:53 C 15 43 29.01 +51 27 58.0 V G96
2020-04-05 09:53:09 C 15 43 27.86 +51 27 48.6 V G96
2020-04-05 10:01:28 C 15 43 26.68 +51 27 39.3 V G96
2020-04-05 10:14:18 S 15 43 48.571 +51 09 45.36 V C57
2020-04-05 10:14:18 s 1 +131601.74 2 +293943.79 3460.0 C57
2020-04-05 10:44:18 S 15 43 45.809 +51 09 13.54 V C57
2020-04-05 10:44:18 s 1 +130717.63 4 +295367.66 8650.0 C57
2020-04-05 11:14:18 S 15 43 42.410 +51 08 39.16 V C57
2020-04-05 11:14:18 s 1 +129828.65 6 +296780.18 6180.0 C57
2020-04-05 13:14:18 S 15 43 29.316 +51 06 11.92 V C57
2020-04-05 13:14:18 s 1 +126225.56 5 +302317.78 1470.0 C57
2020-04-05 13:44:18 S 15 43 26.270 +51 05 34.15 V C57
2020-04-05 13:44:18 s 1 +125313.36 7 +303674.27 2000.0 C57
2020-04-05 14:14:18 S 15 43 22.853 +51 04 58.94 V C57
2020-04-05 14:14:18 s 1 +124396.74 3 +305019.67 5390.0 C57
2020-04-05 14:44:18 S 15 43 19.730 +51 04 20.32 V C57
2020-04-05 14:44:18 s 1 +123475.76 4 +306354.03 1700.0 C57
2020-04-05 15:44:18 S 15 43 12.989 +51 03 06.70 V C57
2020-04-05 15:44:18 s 1 +121621.01 4 +308989.78 3440.0 C57
2020-04-05 16:14:18 S 15 43 09.742 +51 02 32.21 V C57
2020-04-05 16:14:18 s 1 +120687.37 9 +310291.26 9030.0 C57
2020-04-05 16:44:18 S 15 43 06.696 +51 01 51.60 V C57
2020-04-05 16:44:18 s 1 +119749.65 8 +311581.85 7850.0 C57
2020-04-05 17:14:18 S 15 43 03.504 +51 01 17.04 V C57
2020-04-05 17:14:18 s 1 +118807.91 8 +312861.59 0.0 C57
2020-04-05 17:44:18 S 15 43 00.281 +51 00 40.21 V C57
2020-04-05 17:44:18 s 1 +117862.22 3 +314130.53 5530.0 C57
2020-04-05 18:14:18 S 15 42 56.988 +51 00 04.14 V C57
2020-04-05 18:14:18 s 1 +116912.63 6 +315388.70 4530.0 C57
2020-04-05 18:44:18 S 15 42 53.287 +50 59 24.11 V C57
2020-04-05 18:44:18 s 1 +115959.21 9 +316636.15 7080.0 C57
2020-04-05 19:44:18 S 15 42 46.627 +50 58 16.10 V C57
2020-04-05 19:44:18 s 1 +114041.14 4 +319098.98 3060.0 C57
2020-04-05 20:14:18 S 15 42 43.680 +50 57 41.87 V C57
2020-04-05 20:14:18 s 1 +113076.60 7 +320314.46 6640.0 C57
2020-04-05 20:44:18 S 15 42 40.207 +50 56 58.16 V C57
2020-04-05 20:44:18 s 1 +112108.48 2 +321519.34 4050.0 C57