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
2020-03-29 05:14:18 s 1 -211855.49 6 +252500.62 260.0 C57
2020-03-29 05:44:19 S 16 03 25.896 +53 45 51.01 V C57
2020-03-29 05:44:19 s 1 -212322.25 8 +250940.88 5880.0 C57
2020-03-29 06:14:18 S 16 03 23.470 +53 45 37.08 V C57
2020-03-29 06:14:18 s 1 -212781.33 4 +249371.93 5890.0 C57
2020-03-29 06:44:18 S 16 03 20.921 +53 45 24.48 V C57
2020-03-29 06:44:18 s 1 -213232.64 3 +247793.76 220.0 C57
2020-03-29 07:14:19 S 16 03 18.502 +53 45 16.27 V C57
2020-03-29 07:14:19 s 1 -213676.10 5 +246206.36 8790.0 C57
2020-03-29 07:44:18 S 16 03 15.994 +53 44 57.19 V C57
2020-03-29 07:44:18 s 1 -214111.63 7 +244609.70 1520.0 C57
2020-03-29 08:14:18 S 16 03 13.601 +53 44 43.04 V C57
2020-03-29 08:14:18 s 1 -214539.15 5 +243003.78 8330.0 C57
2020-03-29 09:14:18 S 16 03 08.868 +53 44 18.71 V C57
2020-03-29 09:14:18 s 1 -215369.81 2 +239764.05 3860.0 C57
2020-03-29 09:44:18 S 16 03 05.599 +53 44 05.57 V C57
2020-03-29 09:44:18 s 1 -215772.77 8 +238130.21 2410.0 C57
2020-03-29 10:14:19 S 16 03 03.353 +53 43 52.18 V C57
2020-03-29 10:14:19 s 1 -216167.38 4 +236487.04 4710.0 C57
2020-03-29 10:44:18 S 16 03 00.554 +53 43 40.51 V C57
2020-03-29 10:44:18 s 1 -216553.54 0 +234834.52 670.0 C57
2020-03-29 11:14:18 S 16 02 57.938 +53 43 27.48 V C57
2020-03-29 11:14:18 s 1 -216931.15 6 +233172.62 200.0 C57
2020-03-29 11:44:19 S 16 02 55.550 +53 43 13.26 V C57
2020-03-29 11:44:19 s 1 -217300.13 9 +231501.33 3210.0 C57
2020-03-29 12:14:18 S 16 02 52.610 +53 42 59.22 V C57
2020-03-29 12:14:18 s 1 -217660.39 5 +229820.64 9620.0 C57
2020-03-29 12:44:18 S 16 02 50.350 +53 42 46.98 V C57
2020-03-29 12:44:18 s 1 -218011.82 9 +228130.53 9320.0 C57
2020-03-29 13:14:19 S 16 02 47.611 +53 42 34.02 V C57
2020-03-29 13:14:19 s 1 -218354.34 5 +226430.97 2230.0 C57
2020-03-29 13:44:18 S 16 02 44.870 +53 42 18.90 V C57
2020-03-29 13:44:18 s 1 -218687.84 3 +224721.96 8250.0 C57
2020-03-29 14:14:18 S 16 02 42.418 +53 42 09.04 V C57
2020-03-29 14:14:18 s 1 -219012.22 5 +223003.48 7280.0 C57
2020-03-29 15:14:18 S 16 02 37.147 +53 41 38.15 V C57
2020-03-29 15:14:18 s 1 -219633.23 1 +219538.02 3990.0 C57
2020-03-29 15:44:18 S 16 02 34.118 +53 41 26.20 V C57
2020-03-29 15:44:18 s 1 -219929.64 8 +217791.02 1470.0 C57
2020-03-29 16:14:19 S 16 02 31.798 +53 41 16.40 V C57
2020-03-29 16:14:19 s 1 -220216.53 4 +216034.47 1560.0 C57
2020-03-29 16:44:18 S 16 02 28.836 +53 40 58.80 V C57
2020-03-29 16:44:18 s 1 -220493.78 1 +214268.37 4160.0 C57
2020-03-29 17:14:18 S 16 02 26.184 +53 40 46.78 V C57
2020-03-29 17:14:18 s 1 -220761.27 8 +212492.69 9160.0 C57
2020-03-29 17:44:19 S 16 02 23.496 +53 40 33.82 V C57
2020-03-29 17:44:19 s 1 -221018.91 6 +210707.43 6450.0 C57
2020-03-29 18:14:18 S 16 02 20.950 +53 40 18.98 V C57
2020-03-29 18:14:18 s 1 -221266.58 1 +208912.55 5920.0 C57
2020-03-29 18:44:18 S 16 02 18.487 +53 40 05.99 V C57