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
2020-03-28 13:44:18 s 1 -193964.15 3 +296375.93 9250.0 C57
2020-03-28 14:14:19 S 16 04 39.298 +53 52 29.14 V C57
2020-03-28 14:14:19 s 1 -194634.75 8 +295093.63 5750.0 C57
2020-03-28 14:44:19 S 16 04 36.473 +53 52 16.18 V C57
2020-03-28 14:44:19 s 1 -195299.70 0 +293802.59 8570.0 C57
2020-03-28 16:44:18 S 16 04 27.922 +53 51 24.08 V C57
2020-03-28 16:44:18 s 1 -197901.75 4 +288550.89 2070.0 C57
2020-03-28 17:44:19 S 16 04 23.263 +53 50 59.64 V C57
2020-03-28 17:44:19 s 1 -199167.37 2 +285872.30 5400.0 C57
2020-03-28 18:14:18 S 16 04 21.036 +53 50 47.29 V C57
2020-03-28 18:14:18 s 1 -199791.13 0 +284519.78 1030.0 C57
2020-03-28 18:44:19 S 16 04 18.919 +53 50 33.86 V C57
2020-03-28 18:44:19 s 1 -200408.77 5 +283158.41 2550.0 C57
2020-03-28 19:14:19 S 16 04 16.301 +53 50 21.98 V C57
2020-03-28 19:14:19 s 1 -201020.24 8 +281788.19 9910.0 C57
2020-03-28 19:44:18 S 16 04 14.446 +53 50 10.32 V C57
2020-03-28 19:44:18 s 1 -201625.49 0 +280409.09 3060.0 C57
2020-03-28 20:14:19 S 16 04 12.278 +53 49 56.10 V C57
2020-03-28 20:14:19 s 1 -202224.44 0 +279021.11 1940.0 C57
2020-03-28 20:44:19 S 16 04 09.367 +53 49 42.89 V C57
2020-03-28 20:44:19 s 1 -202817.03 6 +277624.23 6480.0 C57
2020-03-28 21:14:18 S 16 04 06.967 +53 49 31.51 V C57
2020-03-28 21:14:18 s 1 -203403.21 6 +276218.44 6630.0 C57
2020-03-28 22:14:19 S 16 04 01.817 +53 49 03.76 V C57
2020-03-28 22:14:19 s 1 -204556.07 5 +273380.05 3510.0 C57
2020-03-28 22:44:18 S 16 04 00.214 +53 48 54.40 V C57
2020-03-28 22:44:18 s 1 -205122.62 5 +271947.42 130.0 C57
2020-03-28 23:14:19 S 16 03 57.305 +53 48 40.72 V C57
2020-03-28 23:14:19 s 1 -205682.50 2 +270505.81 2100.0 C57
2020-03-28 23:44:19 S 16 03 55.459 +53 48 26.46 V C57
2020-03-28 23:44:19 s 1 -206235.64 0 +269055.21 9380.0 C57
2020-03-29 00:44:19 S 16 03 50.479 +53 48 04.72 V C57
2020-03-29 00:44:19 s 1 -207321.42 9 +266126.97 9580.0 C57
2020-03-29 01:14:19 S 16 03 48.101 +53 47 48.26 V C57
2020-03-29 01:14:19 s 1 -207853.94 2 +264649.31 2370.0 C57
2020-03-29 01:44:18 S 16 03 45.588 +53 47 36.20 V C57
2020-03-29 01:44:18 s 1 -208379.44 2 +263162.58 190.0 C57
2020-03-29 02:14:18 S 16 03 43.121 +53 47 21.88 V C57
2020-03-29 02:14:18 s 1 -208897.85 7 +261666.79 2990.0 C57
2020-03-29 02:44:19 S 16 03 41.014 +53 47 09.67 V C57
2020-03-29 02:44:19 s 1 -209409.11 7 +260161.91 690.0 C57
2020-03-29 03:14:18 S 16 03 37.891 +53 46 56.96 V C57
2020-03-29 03:14:18 s 1 -209913.14 8 +258647.92 3230.0 C57
2020-03-29 03:44:18 S 16 03 35.592 +53 46 44.04 V C57
2020-03-29 03:44:18 s 1 -210409.87 7 +257124.82 520.0 C57
2020-03-29 04:14:19 S 16 03 33.353 +53 46 30.22 V C57
2020-03-29 04:14:19 s 1 -210899.22 8 +255592.58 2510.0 C57
2020-03-29 04:44:18 S 16 03 30.972 +53 46 17.40 V C57
2020-03-29 04:44:18 s 1 -211381.12 7 +254051.19 9110.0 C57
2020-03-29 05:14:18 S 16 03 28.526 +53 46 03.43 V C57