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 03:14:18 S 15 10 52.150 +45 29 49.06 V C57
2020-04-14 03:14:18 s 1 -203213.85 2 +103610.23 3100.0 C57
2020-04-14 03:44:18 S 15 10 45.209 +45 28 41.84 V C57
2020-04-14 03:44:18 s 1 -202686.21 6 +101207.96 2580.0 C57
2020-04-14 04:14:18 S 15 10 38.638 +45 27 32.98 V C57
2020-04-14 04:14:18 s 1 -202136.30 8 +98794.575 1800.0 C57
2020-04-14 04:44:18 S 15 10 31.162 +45 26 18.56 V C57
2020-04-14 04:44:18 s 1 -201563.72 7 +96370.111 360.0 C57
2020-04-14 05:14:18 S 15 10 24.857 +45 25 14.52 V C57
2020-04-14 05:14:18 s 1 -200968.05 8 +93934.614 7830.0 C57
2020-04-14 05:44:18 S 15 10 17.297 +45 23 58.96 V C57
2020-04-14 05:44:18 s 1 -200348.87 7 +91488.134 3800.0 C57
2020-04-14 06:14:18 S 15 10 10.426 +45 22 49.62 V C57
2020-04-14 06:14:18 s 1 -199705.74 9 +89030.725 7800.0 C57
2020-04-14 06:44:18 S 15 10 02.686 +45 21 32.58 V C57
2020-04-14 06:44:18 s 1 -199038.22 7 +86562.447 9400.0 C57
2020-04-14 07:14:18 S 15 09 56.126 +45 20 24.65 V C57
2020-04-14 07:14:18 s 1 -198345.85 2 +84083.367 8120.0 C57
2020-04-14 08:14:18 S 15 09 42.667 +45 18 07.60 V C57
2020-04-14 08:14:18 s 1 -196884.64 3 +79093.100 4980.0 C57
2020-04-14 10:14:18 S 15 09 13.565 +45 13 16.32 V C57
2020-04-14 10:14:18 s 1 -193642.35 9 +68986.665 2050.0 C57
2020-04-14 10:44:18 S 15 09 06.154 +45 12 01.98 V C57
2020-04-14 10:44:18 s 1 -192762.06 2 +66434.452 6340.0 C57
2020-04-14 11:14:18 S 15 08 58.834 +45 10 49.26 V C57
2020-04-14 11:14:18 s 1 -191852.75 6 +63872.250 3470.0 C57
2020-04-14 11:44:18 S 15 08 51.982 +45 09 38.20 V C57
2020-04-14 11:44:18 s 1 -190913.85 6 +61300.204 2840.0 C57
2020-04-14 12:44:18 S 15 08 37.063 +45 07 08.69 V C57
2020-04-14 12:44:18 s 1 -188944.84 0 +56127.220 5790.0 C57
2020-04-14 13:14:18 S 15 08 29.450 +45 05 51.07 V C57
2020-04-14 13:14:18 s 1 -187913.46 6 +53526.635 8040.0 C57
2020-04-14 13:44:18 S 15 08 22.178 +45 04 38.10 V C57
2020-04-14 13:44:18 s 1 -186849.98 0 +50916.912 9910.0 C57
2020-04-14 14:14:18 S 15 08 15.574 +45 03 30.89 V C57
2020-04-14 14:14:18 s 1 -185753.70 5 +48298.266 680.0 C57
2020-04-14 14:44:18 S 15 08 07.601 +45 02 10.75 V C57
2020-04-14 14:44:18 s 1 -184623.94 7 +45670.924 9620.0 C57
2020-04-14 15:14:18 S 15 08 00.468 +45 00 57.92 V C57
2020-04-14 15:14:18 s 1 -183459.99 3 +43035.135 5980.0 C57
2020-04-14 15:44:18 S 15 07 52.680 +44 59 39.34 V C57
2020-04-14 15:44:18 s 1 -182261.10 6 +40391.163 8970.0 C57
2020-04-14 16:14:18 S 15 07 45.456 +44 58 28.99 V C57
2020-04-14 16:14:18 s 1 -181026.53 0 +37739.294 7800.0 C57
2020-04-14 16:44:18 S 15 07 37.922 +44 57 11.70 V C57
2020-04-14 16:44:18 s 1 -179755.48 7 +35079.836 1630.0 C57
2020-04-14 17:14:18 S 15 07 30.576 +44 55 57.94 V C57
2020-04-14 17:14:18 s 1 -178447.17 6 +32413.118 9610.0 C57
2020-04-14 17:44:18 S 15 07 22.846 +44 54 40.46 V C57
2020-04-14 17:44:18 s 1 -177100.77 4 +29739.494 850.0 C57