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
2020-03-26 21:14:19 s 1 -124869.11 7 +372245.29 7900.0 C57
2020-03-26 21:44:19 S 16 07 17.623 +54 08 36.38 V C57
2020-03-26 21:44:19 s 1 -125860.81 2 +371637.11 1960.0 C57
2020-03-26 22:14:19 S 16 07 15.910 +54 08 26.27 V C57
2020-03-26 22:14:19 s 1 -126849.85 4 +371020.86 5190.0 C57
2020-03-26 22:44:19 S 16 07 14.244 +54 08 15.36 V C57
2020-03-26 22:44:19 s 1 -127836.21 4 +370396.54 7570.0 C57
2020-03-26 23:14:19 S 16 07 12.821 +54 08 01.21 V C57
2020-03-26 23:14:19 s 1 -128819.86 6 +369764.15 9080.0 C57
2020-03-26 23:44:19 S 16 07 10.829 +54 07 53.80 V C57
2020-03-26 23:44:19 s 1 -129800.78 3 +369123.68 9680.0 C57
2020-03-27 00:14:19 S 16 07 08.534 +54 07 43.79 V C57
2020-03-27 00:14:19 s 1 -130778.93 8 +368475.13 9350.0 C57
2020-03-27 00:44:19 S 16 07 07.694 +54 07 29.78 V C57
2020-03-27 00:44:19 s 1 -131754.30 2 +367818.49 8070.0 C57
2020-03-27 01:14:19 S 16 07 06.101 +54 07 21.18 V C57
2020-03-27 01:14:19 s 1 -132726.85 0 +367153.77 5810.0 C57
2020-03-27 01:44:19 S 16 07 04.054 +54 07 04.37 V C57
2020-03-27 01:44:19 s 1 -133696.55 2 +366480.95 2530.0 C57
2020-03-27 02:14:19 S 16 07 02.239 +54 06 55.33 V C57
2020-03-27 02:14:19 s 1 -134663.38 1 +365800.04 8230.0 C57
2020-03-27 02:44:19 S 16 07 00.458 +54 06 43.85 V C57
2020-03-27 02:44:19 s 1 -135627.30 9 +365111.03 2860.0 C57
2020-03-27 03:14:19 S 16 06 58.694 +54 06 33.73 V C57
2020-03-27 03:14:19 s 1 -136588.30 7 +364413.92 6400.0 C57
2020-03-27 03:44:19 S 16 06 57.185 +54 06 18.04 V C57
2020-03-27 03:44:19 s 1 -137546.34 7 +363708.70 8830.0 C57
2020-03-27 04:14:19 S 16 06 55.152 +54 06 08.28 V C57
2020-03-27 04:14:19 s 1 -138501.40 1 +362995.37 110.0 C57
2020-03-27 04:44:19 S 16 06 53.441 +54 05 56.76 V C57
2020-03-27 04:44:19 s 1 -139453.43 9 +362273.92 220.0 C57
2020-03-27 05:14:19 S 16 06 51.914 +54 05 43.69 V C57
2020-03-27 05:14:19 s 1 -140402.43 3 +361544.35 9140.0 C57
2020-03-27 05:44:19 S 16 06 49.937 +54 05 32.42 V C57
2020-03-27 05:44:19 s 1 -141348.35 3 +360806.65 6830.0 C57
2020-03-27 06:14:19 S 16 06 48.139 +54 05 22.52 V C57
2020-03-27 06:14:19 s 1 -142291.17 0 +360060.83 3260.0 C57
2020-03-27 06:44:19 S 16 06 46.265 +54 05 10.64 V C57
2020-03-27 06:44:19 s 1 -143230.85 4 +359306.87 8410.0 C57
2020-03-27 07:14:19 S 16 06 44.642 +54 04 56.17 V C57
2020-03-27 07:14:19 s 1 -144167.37 6 +358544.77 2250.0 C57
2020-03-27 07:44:19 S 16 06 42.670 +54 04 46.60 V C57
2020-03-27 07:44:19 s 1 -145100.70 4 +357774.52 4750.0 C57
2020-03-27 08:14:19 S 16 06 40.891 +54 04 35.44 V C57
2020-03-27 08:14:19 s 1 -146030.81 0 +356996.12 5880.0 C57
2020-03-27 08:44:19 S 16 06 39.192 +54 04 26.83 V C57
2020-03-27 08:44:19 s 1 -146957.66 3 +356209.57 5620.0 C57
2020-03-27 09:14:19 S 16 06 37.046 +54 04 11.24 V C57
2020-03-27 09:14:19 s 1 -147881.23 1 +355414.85 3930.0 C57
2020-03-27 09:44:19 S 16 06 35.448 +54 04 00.77 V C57