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
2020-04-10 15:14:18 S 15 27 08.563 +48 14 30.19 V C57
2020-04-10 15:14:18 s 1 -131055.38 0 +361180.56 8370.0 C57
2020-04-10 15:44:18 S 15 27 03.574 +48 13 42.24 V C57
2020-04-10 15:44:18 s 1 -131979.97 3 +360406.75 7610.0 C57
2020-04-10 16:14:18 S 15 26 58.543 +48 12 48.67 V C57
2020-04-10 16:14:18 s 1 -132901.47 7 +359624.73 5240.0 C57
2020-04-10 16:44:18 S 15 26 53.474 +48 11 59.39 V C57
2020-04-10 16:44:18 s 1 -133819.86 0 +358834.48 1220.0 C57
2020-04-10 17:14:18 S 15 26 48.905 +48 11 10.07 V C57
2020-04-10 17:14:18 s 1 -134735.09 4 +358036.00 5530.0 C57
2020-04-10 17:44:18 S 15 26 43.646 +48 10 15.78 V C57
2020-04-10 17:44:18 s 1 -135647.14 6 +357229.27 8120.0 C57
2020-04-10 18:14:18 S 15 26 39.050 +48 09 28.19 V C57
2020-04-10 18:14:18 s 1 -136555.98 7 +356414.29 8980.0 C57
2020-04-10 19:14:18 S 15 26 28.697 +48 07 43.39 V C57
2020-04-10 19:14:18 s 1 -138363.90 8 +354759.53 5360.0 C57
2020-04-10 19:44:18 S 15 26 23.844 +48 06 52.20 V C57
2020-04-10 19:44:18 s 1 -139262.92 5 +353919.73 820.0 C57
2020-04-10 20:14:18 S 15 26 18.869 +48 06 02.41 V C57
2020-04-10 20:14:18 s 1 -140158.60 4 +353071.64 4410.0 C57
2020-04-10 20:44:18 S 15 26 13.742 +48 05 10.57 V C57
2020-04-10 20:44:18 s 1 -141050.91 2 +352215.25 6100.0 C57
2020-04-10 21:14:18 S 15 26 08.918 +48 04 20.35 V C57
2020-04-10 21:14:18 s 1 -141939.81 8 +351350.55 5860.0 C57
2020-04-10 21:44:18 S 15 26 03.919 +48 03 30.71 V C57
2020-04-10 21:44:18 s 1 -142825.28 8 +350477.52 3660.0 C57
2020-04-10 22:14:18 S 15 25 58.402 +48 02 39.70 V C57
2020-04-10 22:14:18 s 1 -143707.28 9 +349596.16 9470.0 C57
2020-04-10 22:44:18 S 15 25 53.201 +48 01 45.12 V C57
2020-04-10 22:44:18 s 1 -144585.78 8 +348706.46 3240.0 C57
2020-04-10 23:14:18 S 15 25 48.494 +48 00 55.44 V C57
2020-04-10 23:14:18 s 1 -145460.75 1 +347808.41 4960.0 C57
2020-04-10 23:44:18 S 15 25 43.363 +48 00 06.23 V C57
2020-04-10 23:44:18 s 1 -146332.14 5 +346902.00 4580.0 C57
2020-04-11 00:14:18 S 15 25 38.496 +47 59 12.62 V C57
2020-04-11 00:14:18 s 1 -147199.93 5 +345987.20 2060.0 C57
2020-04-11 00:44:18 S 15 25 33.312 +47 58 21.04 V C57
2020-04-11 00:44:18 s 1 -148064.08 6 +345064.03 7390.0 C57
2020-04-11 02:14:18 S 15 25 17.849 +47 55 43.64 V C57
2020-04-11 02:14:18 s 1 -150634.35 8 +342244.06 30.0 C57
2020-04-11 02:44:18 S 15 25 12.749 +47 54 51.37 V C57
2020-04-11 02:44:18 s 1 -151483.60 4 +341287.22 6360.0 C57
2020-04-11 03:14:18 S 15 25 07.685 +47 54 02.48 V C57
2020-04-11 03:14:18 s 1 -152329.03 3 +340321.93 340.0 C57
2020-04-11 03:44:18 S 15 25 02.158 +47 53 07.44 V C57
2020-04-11 03:44:18 s 1 -153170.60 9 +339348.19 1950.0 C57
2020-04-11 04:14:18 S 15 24 57.151 +47 52 15.24 V C57
2020-04-11 04:14:18 s 1 -154008.29 6 +338365.98 1150.0 C57
2020-04-11 04:44:18 S 15 24 52.070 +47 51 21.85 V C57
2020-04-11 04:44:18 s 1 -154842.05 6 +337375.29 7900.0 C57