IAA RAS IAA Minor Planet Database

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
2020-04-14 18:14:18 S 15 07 15.041 +44 53 19.75 – V C57
2020-04-14 18:14:18 s 1 -175715.43 1 +27059.346 4440.0 – C57
2020-04-14 18:44:18 S 15 07 08.198 +44 52 10.13 – V C57
2020-04-14 18:44:18 s 1 -174290.27 7 +24373.082 9450.0 – C57
2020-04-14 19:14:18 S 15 07 00.778 +44 50 56.83 – V C57
2020-04-14 19:14:18 s 1 -172824.41 5 +21681.140 4890.0 – C57
2020-04-14 19:44:18 S 15 06 52.973 +44 49 36.62 – V C57
2020-04-14 19:44:18 s 1 -171316.92 1 +18983.992 9770.0 – C57
2020-04-14 20:14:18 S 15 06 45.358 +44 48 18.43 – V C57
2020-04-14 20:14:18 s 1 -169766.84 7 +16282.141 3050.0 – C57
2020-04-14 20:44:18 S 15 06 37.740 +44 47 02.44 – V C57
2020-04-14 20:44:18 s 1 -168173.21 9 +13576.130 3660.0 – C57
2020-04-14 21:14:18 S 15 06 30.540 +44 45 49.50 – V C57
2020-04-14 21:14:18 s 1 -166535.03 3 +10866.540 490.0 – C57
2020-04-14 21:44:18 S 15 06 22.229 +44 44 25.44 – V C57
2020-04-14 21:44:18 s 1 -164851.26 1 + 8153.994 2420.0 – C57
2020-04-14 22:14:18 S 15 06 14.621 +44 43 05.63 – V C57
2020-04-14 22:14:18 s 1 -163120.84 3 + 5439.159 8260.0 – C57
2020-04-14 22:44:18 S 15 06 07.354 +44 41 52.69 – V C57
2020-04-14 22:44:18 s 1 -161342.69 5 + 2722.753 6800.0 – C57
2020-04-14 23:14:18 S 15 05 58.514 +44 40 25.36 – V C57
2020-04-14 23:14:18 s 1 -159515.70 2 + 5.542 6800.0 – C57
2020-04-14 23:44:18 S 15 05 50.275 +44 39 16.49 – V C57
2020-04-14 23:44:18 s 1 -157638.72 2 - 2711.649 6960.0 – C57
2020-04-15 00:14:18 S 15 05 43.030 +44 37 45.73 – V C57
2020-04-15 00:14:18 s 1 -155710.58 3 - 5427.939 5970.0 – C57
2020-04-15 00:44:18 S 15 05 35.568 +44 36 29.48 – V C57
2020-04-15 00:44:18 s 1 -153730.08 8 - 8142.381 2440.0 – C57
2020-04-15 01:14:18 S 15 05 27.158 +44 35 03.05 – V C57
2020-04-15 01:14:18 s 1 -151696.00 8 -10853.962 4980.0 – C57
2020-04-15 01:44:18 S 15 05 19.507 +44 33 43.60 – V C57
2020-04-15 01:44:18 s 1 -149607.09 1 -13561.595 2140.0 – C57
2020-04-15 02:44:18 S 15 05 03.838 +44 31 05.27 – V C57
2020-04-15 02:44:18 s 1 -145259.59 9 -18960.278 4310.0 – C57
2020-04-15 03:44:18 S 15 04 48.864 +44 28 29.10 – V C57
2020-04-15 03:44:18 s 1 -140677.08 3 -24328.085 6580.0 – C57
2020-04-15 04:14:18 S 15 04 40.423 +44 27 02.02 – V C57
2020-04-15 04:14:18 s 1 -138294.30 7 -26996.767 3710.0 – C57
2020-04-15 04:44:18 S 15 04 31.656 +44 25 33.38 – V C57
2020-04-15 04:44:18 s 1 -135848.67 8 -29653.150 5930.0 – C57
2020-04-15 05:14:18 S 15 04 23.969 +44 24 11.92 – V C57
2020-04-15 05:14:18 s 1 -133338.79 7 -32295.478 1540.0 – C57
2020-04-15 05:44:18 S 15 04 15.686 +44 22 47.14 – V C57
2020-04-15 05:44:18 s 1 -130763.26 1 -34921.872 8790.0 – C57
2020-04-15 06:14:18 S 15 04 08.525 +44 21 33.52 – V C57
2020-04-15 06:14:18 s 1 -128120.65 9 -37530.323 5900.0 – C57
2020-04-15 06:44:18 S 15 03 59.822 +44 20 03.44 – V C57
2020-04-15 06:44:18 s 1 -125409.58 6 -40118.682 1070.0 – C57
2020-04-15 07:14:18 S 15 03 50.842 +44 18 28.44 – V C57
2020-04-15 07:14:18 s 1 -122628.64 3 -42684.656 2490.0 – C57