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
2020-04-09 10:14:18 S 15 31 40.351 +49 00 44.60 – V C57
2020-04-09 10:14:18 s 1 -73077.610 0 +392211.12 8560.0 – C57
2020-04-09 10:44:18 S 15 31 36.158 +49 00 00.72 – V C57
2020-04-09 10:44:18 s 1 -74135.874 0 +391904.62 3380.0 – C57
2020-04-09 11:14:18 S 15 31 31.572 +48 59 12.59 – V C57
2020-04-09 11:14:18 s 1 -75192.518 0 +391590.13 8250.0 – C57
2020-04-09 11:44:18 S 15 31 27.082 +48 58 27.26 – V C57
2020-04-09 11:44:18 s 1 -76247.519 0 +391267.67 3200.0 – C57
2020-04-09 13:44:18 S 15 31 09.108 +48 55 23.66 – V C57
2020-04-09 13:44:18 s 1 -80450.655 0 +389897.97 4220.0 – C57
2020-04-09 14:14:18 S 15 31 04.714 +48 54 38.48 – V C57
2020-04-09 14:14:18 s 1 -81497.109 0 +389535.59 9900.0 – C57
2020-04-09 15:14:18 S 15 30 55.481 +48 53 04.16 – V C57
2020-04-09 15:14:18 s 1 -83584.663 0 +388786.87 8030.0 – C57
2020-04-09 15:44:18 S 15 30 50.926 +48 52 16.10 – V C57
2020-04-09 15:44:18 s 1 -84625.717 0 +388400.53 1590.0 – C57
2020-04-09 16:14:18 S 15 30 46.325 +48 51 32.69 – V C57
2020-04-09 16:14:18 s 1 -85664.925 0 +388006.20 4860.0 – C57
2020-04-09 16:44:18 S 15 30 41.892 +48 50 44.16 – V C57
2020-04-09 16:44:18 s 1 -86702.265 0 +387603.88 7800.0 – C57
2020-04-09 17:14:18 S 15 30 37.337 +48 49 58.91 – V C57
2020-04-09 17:14:18 s 1 -87737.713 0 +387193.57 390.0 – C57
2020-04-09 17:44:18 S 15 30 32.441 +48 49 09.48 – V C57
2020-04-09 17:44:18 s 1 -88771.246 0 +386775.27 2600.0 – C57
2020-04-09 18:14:18 S 15 30 28.034 +48 48 24.84 – V C57
2020-04-09 18:14:18 s 1 -89802.842 0 +386348.98 4410.0 – C57
2020-04-09 18:44:18 S 15 30 23.676 +48 47 39.84 – V C57
2020-04-09 18:44:18 s 1 -90832.475 0 +385914.69 5800.0 – C57
2020-04-09 19:14:18 S 15 30 19.190 +48 46 51.49 – V C57
2020-04-09 19:14:18 s 1 -91860.125 0 +385472.40 6730.0 – C57
2020-04-09 19:44:18 S 15 30 14.558 +48 46 03.50 – V C57
2020-04-09 19:44:18 s 1 -92885.765 0 +385022.10 7180.0 – C57
2020-04-09 20:14:18 S 15 30 09.919 +48 45 17.10 – V C57
2020-04-09 20:14:18 s 1 -93909.374 0 +384563.81 7130.0 – C57
2020-04-09 20:44:18 S 15 30 04.956 +48 44 28.54 – V C57
2020-04-09 20:44:18 s 1 -94930.928 0 +384097.51 6540.0 – C57
2020-04-09 21:14:18 S 15 30 00.370 +48 43 41.45 – V C57
2020-04-09 21:14:18 s 1 -95950.402 0 +383623.20 5400.0 – C57
2020-04-09 23:44:18 S 15 29 37.490 +48 39 45.32 – V C57
2020-04-09 23:44:18 s 1 -101015.74 0 +381131.45 450.0 – C57
2020-04-09 23:49:04 C 15 27 12.19 +48 53 11.0 – r 106
2020-04-10 00:03:39 C 15 27 09.62 +48 52 46.5 – r 106
2020-04-10 00:14:18 S 15 29 32.659 +48 38 59.06 – V C57
2020-04-10 00:14:18 s 1 -102022.23 1 +380609.03 5420.0 – C57
2020-04-10 00:18:13 C 15 27 07.08 +48 52 21.4 – r 106
2020-04-10 00:32:48 C 15 27 04.54 +48 51 56.6 – r 106
2020-04-10 01:44:18 S 15 29 18.593 +48 36 33.95 – V C57
2020-04-10 01:44:18 s 1 -105028.11 2 +378993.58 5800.0 – C57
2020-04-10 02:14:18 S 15 29 13.877 +48 35 44.66 – V C57
2020-04-10 02:14:18 s 1 -106025.45 8 +378439.01 7660.0 – C57