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
2020-04-06 19:44:18 s 1 +64578.088 0 +366056.92 8960.0 – C57
2020-04-06 20:14:18 S 15 39 57.542 +50 27 25.49 – V C57
2020-04-06 20:14:18 s 1 +63496.277 0 +366799.06 610.0 – C57
2020-04-06 20:44:18 S 15 39 53.815 +50 26 43.12 – V C57
2020-04-06 20:44:18 s 1 +62413.018 0 +367531.98 8610.0 – C57
2020-04-06 21:14:18 S 15 39 50.592 +50 26 05.42 – V C57
2020-04-06 21:14:18 s 1 +61328.343 0 +368255.70 3010.0 – C57
2020-04-06 21:44:18 S 15 39 46.966 +50 25 27.05 – V C57
2020-04-06 21:44:18 s 1 +60242.287 0 +368970.24 3850.0 – C57
2020-04-06 22:14:18 S 15 39 43.030 +50 24 45.22 – V C57
2020-04-06 22:14:18 s 1 +59154.882 0 +369675.62 1160.0 – C57
2020-04-06 22:44:18 S 15 39 39.624 +50 24 08.10 – V C57
2020-04-06 22:44:18 s 1 +58066.163 0 +370371.86 4990.0 – C57
2020-04-06 23:14:18 S 15 39 36.024 +50 23 32.78 – V C57
2020-04-06 23:14:18 s 1 +56976.161 0 +371058.98 5380.0 – C57
2020-04-06 23:44:18 S 15 39 32.222 +50 22 52.25 – V C57
2020-04-06 23:44:18 s 1 +55884.910 0 +371737.00 2370.0 – C57
2020-04-07 00:14:18 S 15 39 28.874 +50 22 11.28 – V C57
2020-04-07 00:14:18 s 1 +54792.440 0 +372405.94 5990.0 – C57
2020-04-07 00:44:18 S 15 39 25.044 +50 21 34.02 – V C57
2020-04-07 00:44:18 s 1 +53698.785 0 +373065.83 6280.0 – C57
2020-04-07 01:14:18 S 15 39 21.634 +50 20 54.64 – V C57
2020-04-07 01:14:18 s 1 +52603.976 0 +373716.68 3290.0 – C57
2020-04-07 02:14:18 S 15 39 13.920 +50 19 34.14 – V C57
2020-04-07 02:14:18 s 1 +50411.019 0 +374991.34 7600.0 – C57
2020-04-07 02:44:18 S 15 39 10.522 +50 18 56.59 – V C57
2020-04-07 02:44:18 s 1 +49312.934 0 +375615.19 4970.0 – C57
2020-04-07 03:14:18 S 15 39 06.806 +50 18 18.07 – V C57
2020-04-07 03:14:18 s 1 +48213.819 0 +376230.08 9210.0 – C57
2020-04-07 03:44:18 S 15 39 02.681 +50 17 34.48 – V C57
2020-04-07 03:44:18 s 1 +47113.703 0 +376836.02 350.0 – C57
2020-04-07 04:14:18 S 15 38 59.455 +50 17 00.35 – V C57
2020-04-07 04:14:18 s 1 +46012.618 0 +377433.04 8420.0 – C57
2020-04-07 04:44:18 S 15 38 55.426 +50 16 17.98 – V C57
2020-04-07 04:44:18 s 1 +44910.592 0 +378021.16 3470.0 – C57
2020-04-07 05:14:18 S 15 38 51.960 +50 15 40.21 – V C57
2020-04-07 05:14:18 s 1 +43807.656 0 +378600.38 5530.0 – C57
2020-04-07 05:44:18 S 15 38 48.130 +50 15 01.12 – V C57
2020-04-07 05:44:18 s 1 +42703.838 0 +379170.74 4630.0 – C57
2020-04-07 06:14:18 S 15 38 44.383 +50 14 20.04 – V C57
2020-04-07 06:14:18 s 1 +41599.169 0 +379732.24 820.0 – C57
2020-04-07 12:59:37 C 15 36 22.91 +50 24 04.1 – V T08
2020-04-07 13:04:16 C 15 36 22.16 +50 23 57.4 – V T08
2020-04-07 13:13:37 C 15 36 20.68 +50 23 44.7 – V T08
2020-04-08 06:14:18 S 15 35 38.186 +49 41 40.81 – V C57
2020-04-08 06:14:18 s 1 -11900.883 0 +396566.85 8910.0 – C57
2020-04-08 06:44:18 S 15 35 34.262 +49 40 57.29 – V C57
2020-04-08 06:44:18 s 1 -13015.196 0 +396711.96 1360.0 – C57
2020-04-08 07:14:18 S 15 35 30.223 +49 40 18.37 – V C57
2020-04-08 07:14:18 s 1 -14129.107 0 +396848.85 2430.0 – C57