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
2020-03-30 12:14:18 s 1 -222406.28 2 +137782.58 4290.0 C57
2020-03-30 12:44:18 S 16 00 32.926 +53 31 37.13 V C57
2020-03-30 12:44:18 s 1 -222184.36 1 +135623.63 5200.0 C57
2020-03-30 13:14:18 S 16 00 29.782 +53 31 22.19 V C57
2020-03-30 13:14:18 s 1 -221946.30 4 +133454.76 2160.0 C57
2020-03-30 13:43:43 C 15 58 46.15 +53 30 47.2 V T08
2020-03-30 13:44:18 S 16 00 26.762 +53 31 09.44 V C57
2020-03-30 13:44:18 s 1 -221691.87 9 +131275.98 4930.0 C57
2020-03-30 13:49:02 C 15 58 45.62 +53 30 43.5 V T08
2020-03-30 13:56:44 C 15 58 44.87 +53 30 38.7 V T08
2020-03-30 14:11:12 C 15 58 43.42 +53 30 28.8 V T08
2020-03-30 14:14:18 S 16 00 23.892 +53 30 52.88 V C57
2020-03-30 14:14:18 s 1 -221420.85 3 +129087.30 3290.0 C57
2020-03-30 14:44:18 S 16 00 20.590 +53 30 37.62 V C57
2020-03-30 14:44:18 s 1 -221132.98 5 +126888.73 6980.0 C57
2020-03-30 15:14:18 S 16 00 17.477 +53 30 21.28 V C57
2020-03-30 15:14:18 s 1 -220828.03 1 +124680.28 5760.0 C57
2020-03-30 15:44:18 S 16 00 14.234 +53 30 08.10 V C57
2020-03-30 15:44:18 s 1 -220505.74 0 +122461.99 9380.0 C57
2020-03-30 16:44:18 S 16 00 07.610 +53 29 37.25 V C57
2020-03-30 16:44:18 s 1 -219808.12 3 +117995.90 50.0 C57
2020-03-30 17:14:18 S 16 00 04.699 +53 29 22.34 V C57
2020-03-30 17:14:18 s 1 -219432.27 0 +115748.16 6570.0 C57
2020-03-30 17:44:18 S 16 00 01.637 +53 29 04.60 V C57
2020-03-30 17:44:18 s 1 -219038.02 6 +113490.65 6840.0 C57
2020-03-30 18:44:18 S 15 59 54.708 +53 28 39.68 V C57
2020-03-30 18:44:18 s 1 -218193.24 8 +108946.45 7490.0 C57
2020-03-30 19:14:18 S 15 59 51.449 +53 28 24.20 V C57
2020-03-30 19:14:18 s 1 -217742.13 9 +106659.83 7270.0 C57
2020-03-30 19:44:18 S 15 59 48.170 +53 28 08.72 V C57
2020-03-30 19:44:18 s 1 -217271.49 0 +104363.57 9630.0 C57
2020-03-30 20:14:18 S 15 59 44.978 +53 27 51.62 V C57
2020-03-30 20:14:18 s 1 -216780.99 8 +102057.72 4230.0 C57
2020-03-30 20:44:18 S 15 59 41.352 +53 27 37.40 V C57
2020-03-30 20:44:18 s 1 -216270.35 3 +99742.326 770.0 C57
2020-03-30 21:14:18 S 15 59 38.210 +53 27 23.00 V C57
2020-03-30 21:14:18 s 1 -215739.23 7 +97417.427 8920.0 C57
2020-03-30 21:44:18 S 15 59 34.512 +53 27 07.06 V C57
2020-03-30 21:44:18 s 1 -215187.32 6 +95083.078 8330.0 C57
2020-03-30 22:14:18 S 15 59 31.421 +53 26 50.64 V C57
2020-03-30 22:14:18 s 1 -214614.28 9 +92739.336 8660.0 C57
2020-03-30 22:44:18 S 15 59 28.030 +53 26 35.74 V C57
2020-03-30 22:44:18 s 1 -214019.78 7 +90386.259 9560.0 C57
2020-03-30 23:14:18 S 15 59 24.742 +53 26 18.82 V C57
2020-03-30 23:14:18 s 1 -213403.47 2 +88023.914 660.0 C57
2020-03-30 23:44:18 S 15 59 21.511 +53 26 04.09 V C57
2020-03-30 23:44:18 s 1 -212764.99 0 +85652.368 1590.0 C57
2020-03-31 00:14:18 S 15 59 18.190 +53 25 52.61 V C57
2020-03-31 00:14:18 s 1 -212103.97 7 +83271.695 1970.0 C57
2020-03-31 00:44:18 S 15 59 14.537 +53 25 36.34 V C57