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
2020-04-08 21:14:18 S 15 33 33.830 +49 20 12.01 – V C57
2020-04-08 21:14:18 s 1 -45065.951 0 +397374.55 7820.0 – C57
2020-04-08 21:44:18 S 15 33 29.280 +49 19 28.24 – V C57
2020-04-08 21:44:18 s 1 -46158.665 0 +397276.09 190.0 – C57
2020-04-08 22:14:18 S 15 33 25.097 +49 18 43.60 – V C57
2020-04-08 22:14:18 s 1 -47250.324 0 +397169.61 1960.0 – C57
2020-04-08 22:44:18 S 15 33 20.911 +49 17 56.18 – V C57
2020-04-08 22:44:18 s 1 -48340.906 0 +397055.09 3150.0 – C57
2020-04-08 23:14:18 S 15 33 16.555 +49 17 13.13 – V C57
2020-04-08 23:14:18 s 1 -49430.390 0 +396932.54 3790.0 – C57
2020-04-08 23:44:18 S 15 33 13.008 +49 16 32.92 – V C57
2020-04-08 23:44:18 s 1 -50518.755 0 +396801.97 3900.0 – C57
2020-04-09 00:44:18 S 15 33 03.893 +49 15 01.37 – V C57
2020-04-09 00:44:18 s 1 -52692.040 0 +396516.77 2630.0 – C57
2020-04-09 01:14:18 S 15 32 59.362 +49 14 16.22 – V C57
2020-04-09 01:14:18 s 1 -53776.918 0 +396362.14 1300.0 – C57
2020-04-09 01:44:18 S 15 32 55.061 +49 13 33.64 – V C57
2020-04-09 01:44:18 s 1 -54860.590 0 +396199.51 9550.0 – C57
2020-04-09 02:14:18 S 15 32 50.633 +49 12 46.01 – V C57
2020-04-09 02:14:18 s 1 -55943.035 0 +396028.87 7390.0 – C57
2020-04-09 02:44:18 S 15 32 46.608 +49 12 02.74 – V C57
2020-04-09 02:44:18 s 1 -57024.232 0 +395850.22 4860.0 – C57
2020-04-09 03:14:18 S 15 32 41.966 +49 11 19.75 – V C57
2020-04-09 03:14:18 s 1 -58104.158 0 +395663.56 1980.0 – C57
2020-04-09 03:44:18 S 15 32 37.867 +49 10 33.82 – V C57
2020-04-09 03:44:18 s 1 -59182.793 0 +395468.91 8760.0 – C57
2020-04-09 04:14:18 S 15 32 33.290 +49 09 48.82 – V C57
2020-04-09 04:14:18 s 1 -60260.114 0 +395266.26 5250.0 – C57
2020-04-09 04:44:18 S 15 32 29.165 +49 09 06.08 – V C57
2020-04-09 04:44:18 s 1 -61336.101 0 +395055.61 1450.0 – C57
2020-04-09 05:14:18 S 15 32 24.727 +49 08 21.73 – V C57
2020-04-09 05:14:18 s 1 -62410.730 0 +394836.96 7410.0 – C57
2020-04-09 05:44:18 S 15 32 20.153 +49 07 30.47 – V C57
2020-04-09 05:44:18 s 1 -63483.981 0 +394610.32 3130.0 – C57
2020-04-09 06:14:18 S 15 32 15.658 +49 06 48.20 – V C57
2020-04-09 06:14:18 s 1 -64555.832 0 +394375.69 8660.0 – C57
2020-04-09 06:44:18 S 15 32 11.376 +49 06 02.45 – V C57
2020-04-09 06:44:18 s 1 -65626.261 0 +394133.07 4000.0 – C57
2020-04-09 07:14:18 S 15 32 07.183 +49 05 19.14 – V C57
2020-04-09 07:14:18 s 1 -66695.246 0 +393882.47 9200.0 – C57
2020-04-09 07:44:18 S 15 32 02.393 +49 04 30.50 – V C57
2020-04-09 07:44:18 s 1 -67762.766 0 +393623.87 4260.0 – C57
2020-04-09 08:14:18 S 15 31 58.174 +49 03 45.18 – V C57
2020-04-09 08:14:18 s 1 -68828.798 0 +393357.29 9230.0 – C57
2020-04-09 08:44:18 S 15 31 53.971 +49 03 03.24 – V C57
2020-04-09 08:44:18 s 1 -69893.320 0 +393082.72 4110.0 – C57
2020-04-09 09:14:18 S 15 31 49.296 +49 02 17.66 – V C57
2020-04-09 09:14:18 s 1 -70956.311 0 +392800.17 8950.0 – C57
2020-04-09 09:44:18 S 15 31 44.818 +49 01 29.32 – V C57
2020-04-09 09:44:18 s 1 -72017.748 0 +392509.64 3750.0 – C57