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
2020-03-27 09:44:19 s 1 -148801.48 5 +354611.97 780.0 C57
2020-03-27 10:14:19 S 16 06 33.334 +54 03 47.02 V C57
2020-03-27 10:14:19 s 1 -149718.39 2 +353800.91 6150.0 C57
2020-03-27 10:44:19 S 16 06 31.450 +54 03 37.48 V C57
2020-03-27 10:44:19 s 1 -150631.92 2 +352981.67 10.0 C57
2020-03-27 11:14:19 S 16 06 29.887 +54 03 26.39 V C57
2020-03-27 11:14:19 s 1 -151542.04 3 +352154.24 2320.0 C57
2020-03-27 11:44:19 S 16 06 27.842 +54 03 11.95 V C57
2020-03-27 11:44:19 s 1 -152448.72 3 +351318.62 3050.0 C57
2020-03-27 12:14:19 S 16 06 25.565 +54 02 57.55 V C57
2020-03-27 12:14:19 s 1 -153351.93 0 +350474.81 2180.0 C57
2020-03-27 12:44:19 S 16 06 24.271 +54 02 48.84 V C57
2020-03-27 12:44:19 s 1 -154251.63 1 +349622.78 9680.0 C57
2020-03-27 13:14:19 S 16 06 21.972 +54 02 37.21 V C57
2020-03-27 13:14:19 s 1 -155147.79 5 +348762.55 5500.0 C57
2020-03-27 16:14:19 S 16 06 10.728 +54 01 25.82 V C57
2020-03-27 16:14:19 s 1 -160448.61 9 +343428.29 3700.0 C57
2020-03-27 16:44:19 S 16 06 08.959 +54 01 13.87 V C57
2020-03-27 16:44:19 s 1 -161319.08 1 +342510.38 6970.0 C57
2020-03-27 17:14:19 S 16 06 06.972 +54 01 01.20 V C57
2020-03-27 17:14:19 s 1 -162185.73 5 +341584.19 8320.0 C57
2020-03-27 17:44:19 S 16 06 05.059 +54 00 48.38 V C57
2020-03-27 17:44:19 s 1 -163048.54 6 +340649.72 7720.0 C57
2020-03-27 18:14:19 S 16 06 03.295 +54 00 35.14 V C57
2020-03-27 18:14:19 s 1 -163907.47 7 +339706.97 5120.0 C57
2020-03-27 18:44:19 S 16 06 01.382 +54 00 24.80 V C57
2020-03-27 18:44:19 s 1 -164762.49 4 +338755.92 500.0 C57
2020-03-27 19:14:19 S 16 05 59.098 +54 00 15.80 V C57
2020-03-27 19:14:19 s 1 -165613.56 1 +337796.57 3830.0 C57
2020-03-27 19:44:19 S 16 05 57.317 +53 59 59.53 V C57
2020-03-27 19:44:19 s 1 -166460.64 1 +336828.90 5060.0 C57
2020-03-27 20:14:19 S 16 05 55.116 +53 59 50.50 V C57
2020-03-27 20:14:19 s 1 -167303.69 7 +335852.92 4170.0 C57
2020-03-27 20:44:19 S 16 05 53.146 +53 59 33.25 V C57
2020-03-27 20:44:19 s 1 -168142.69 3 +334868.61 1120.0 C57
2020-03-27 21:44:19 S 16 05 49.272 +53 59 13.78 V C57
2020-03-27 21:44:19 s 1 -169808.35 3 +332874.97 8390.0 C57
2020-03-27 22:44:19 S 16 05 45.182 +53 58 48.90 V C57
2020-03-27 22:44:19 s 1 -171457.32 0 +330847.91 6590.0 C57
2020-03-27 23:14:19 S 16 05 43.128 +53 58 38.24 V C57
2020-03-27 23:14:19 s 1 -172275.44 8 +329821.82 2200.0 C57
2020-03-27 23:44:19 S 16 05 40.994 +53 58 25.82 V C57
2020-03-27 23:44:19 s 1 -173089.28 6 +328787.35 5440.0 C57
2020-03-28 00:14:19 S 16 05 39.139 +53 58 13.55 V C57
2020-03-28 00:14:19 s 1 -173898.79 5 +327744.49 6250.0 C57
2020-03-28 00:44:19 S 16 05 37.094 +53 58 00.91 V C57
2020-03-28 00:44:19 s 1 -174703.93 6 +326693.22 4620.0 C57
2020-03-28 01:14:19 S 16 05 35.100 +53 57 50.22 V C57
2020-03-28 01:14:19 s 1 -175504.66 9 +325633.55 500.0 C57
2020-03-28 01:44:19 S 16 05 32.935 +53 57 38.77 V C57