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
2020-04-04 19:44:18 s 1 +154727.96 5 +247511.47 4920.0 C57
2020-04-04 20:08:53 C 15 45 15.18 +51 42 40.9 L04
2020-04-04 20:14:18 S 15 45 16.824 +51 26 39.16 V C57
2020-04-04 20:14:18 s 1 +154024.86 8 +249284.76 7120.0 C57
2020-04-04 20:16:09 C 15 45 14.24 +51 42 33.6 L04
2020-04-04 20:22:42 C 15 45 13.40 +51 42 26.6 L04
2020-04-04 20:44:18 S 15 45 14.045 +51 26 08.84 V C57
2020-04-04 20:44:18 s 1 +153314.02 0 +251045.28 8430.0 C57
2020-04-04 21:14:18 S 15 45 10.579 +51 25 29.60 V C57
2020-04-04 21:14:18 s 1 +152595.54 7 +252793.08 8990.0 C57
2020-04-04 21:19:58 C 15 45 06.20 +51 41 25.1 V B67
2020-04-04 21:25:25 C 15 45 05.48 +51 41 19.5 V B67
2020-04-04 21:30:52 C 15 45 04.80 +51 41 14.1 V B67
2020-04-04 21:44:18 S 15 45 07.543 +51 24 56.99 V C57
2020-04-04 21:44:18 s 1 +151869.57 2 +254528.22 8920.0 C57
2020-04-04 22:14:18 S 15 45 04.673 +51 24 18.72 V C57
2020-04-04 22:14:18 s 1 +151136.21 6 +256250.75 8370.0 C57
2020-04-04 22:44:18 S 15 45 01.416 +51 23 44.09 V C57
2020-04-04 22:44:18 s 1 +150395.59 9 +257960.72 7480.0 C57
2020-04-04 23:07:06 C 15 44 52.21 +51 39 31.6 V Z80
2020-04-04 23:12:05 C 15 44 51.59 +51 39 26.0 V Z80
2020-04-04 23:14:18 S 15 44 58.291 +51 23 04.99 V C57
2020-04-04 23:14:18 s 1 +149647.83 7 +259658.20 6360.0 C57
2020-04-04 23:17:05 C 15 44 51.01 +51 39 21.1 V Z80
2020-04-04 23:44:18 S 15 44 55.380 +51 22 32.70 V C57
2020-04-04 23:44:18 s 1 +148893.04 5 +261343.22 5140.0 C57
2020-04-05 00:14:18 S 15 44 52.190 +51 21 54.90 V C57
2020-04-05 00:14:18 s 1 +148131.33 5 +263015.86 3960.0 C57
2020-04-05 00:44:18 S 15 44 48.924 +51 21 17.35 V C57
2020-04-05 00:44:18 s 1 +147362.81 8 +264676.15 2930.0 C57
2020-04-05 01:14:18 S 15 44 45.696 +51 20 43.69 V C57
2020-04-05 01:14:18 s 1 +146587.60 3 +266324.16 2180.0 C57
2020-04-05 01:44:18 S 15 44 43.070 +51 20 03.95 V C57
2020-04-05 01:44:18 s 1 +145805.79 7 +267959.93 1830.0 C57
2020-04-05 02:14:18 S 15 44 39.499 +51 19 28.70 V C57
2020-04-05 02:14:18 s 1 +145017.50 4 +269583.51 1990.0 C57
2020-04-05 02:44:18 S 15 44 36.535 +51 18 51.48 V C57
2020-04-05 02:44:18 s 1 +144222.82 8 +271194.96 2780.0 C57
2020-04-05 04:14:18 S 15 44 26.923 +51 17 05.32 V C57
2020-04-05 04:14:18 s 1 +141801.50 5 +275956.99 60.0 C57
2020-04-05 04:44:18 S 15 44 23.772 +51 16 30.07 V C57
2020-04-05 04:44:18 s 1 +140982.29 2 +277520.40 4490.0 C57
2020-04-05 05:14:18 S 15 44 20.767 +51 15 51.44 V C57
2020-04-05 05:14:18 s 1 +140157.18 6 +279071.93 100.0 C57
2020-04-05 05:44:18 S 15 44 17.563 +51 15 17.39 V C57
2020-04-05 05:44:18 s 1 +139326.27 9 +280611.61 6990.0 C57
2020-04-05 06:14:18 S 15 44 14.482 +51 14 39.95 V C57
2020-04-05 06:14:18 s 1 +138489.66 4 +282139.50 5270.0 C57
2020-04-05 06:44:18 S 15 44 11.542 +51 14 04.81 V C57
2020-04-05 06:44:18 s 1 +137647.43 0 +283655.65 5050.0 C57