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
2020-04-18 15:44:17 S 14 46 20.765 +39 27 53.57 V C57
2020-04-18 15:44:17 s 1 +153256.40 2 +235224.89 7560.0 C57
2020-04-18 16:44:17 S 14 46 08.561 +39 23 48.59 V C57
2020-04-18 16:44:17 s 1 +151994.94 1 +238935.69 7110.0 C57
2020-04-18 17:44:17 S 14 45 57.331 +39 20 00.46 V C57
2020-04-18 17:44:17 s 1 +150699.21 0 +242592.38 3230.0 C57
2020-04-18 20:14:17 S 14 45 27.751 +39 10 06.10 V C57
2020-04-18 20:14:17 s 1 +147317.32 8 +251500.91 1510.0 C57
2020-04-18 20:44:17 S 14 45 22.625 +39 08 18.35 V C57
2020-04-18 20:44:17 s 1 +146617.58 2 +253243.15 3130.0 C57
2020-04-18 21:14:17 S 14 45 16.056 +39 06 15.66 V C57
2020-04-18 21:14:17 s 1 +145910.34 5 +254972.40 5060.0 C57
2020-04-18 21:44:17 S 14 45 10.190 +39 04 16.86 V C57
2020-04-18 21:44:17 s 1 +145195.73 9 +256688.70 7430.0 C57
2020-04-18 22:14:17 S 14 45 04.529 +39 02 27.42 V C57
2020-04-18 22:14:17 s 1 +144473.88 5 +258392.12 390.0 C57
2020-04-18 22:44:17 S 14 44 59.342 +39 00 15.19 V C57
2020-04-18 22:44:17 s 1 +143744.90 0 +260082.72 4050.0 C57
2020-04-18 23:14:17 S 14 44 52.308 +38 58 26.15 V C57
2020-04-18 23:14:17 s 1 +143008.90 2 +261760.57 8540.0 C57
2020-04-18 23:44:17 S 14 44 47.026 +38 56 39.23 V C57
2020-04-18 23:44:17 s 1 +142266.00 3 +263425.71 3990.0 C57
2020-04-19 00:14:17 S 14 44 40.584 +38 54 31.43 V C57
2020-04-19 00:14:17 s 1 +141516.31 5 +265078.22 530.0 C57
2020-04-19 00:44:17 S 14 44 34.210 +38 52 24.92 V C57
2020-04-19 00:44:17 s 1 +140759.94 8 +266718.15 8260.0 C57
2020-04-19 01:14:17 S 14 44 28.778 +38 50 40.38 V C57
2020-04-19 01:14:17 s 1 +139997.00 9 +268345.55 7310.0 C57
2020-04-19 01:44:17 S 14 44 22.639 +38 48 39.13 V C57
2020-04-19 01:44:17 s 1 +139227.60 5 +269960.49 7800.0 C57
2020-04-19 02:44:17 S 14 44 10.630 +38 44 35.20 V C57
2020-04-19 02:44:17 s 1 +137669.81 1 +273153.20 3530.0 C57
2020-04-19 04:14:17 S 14 43 52.154 +38 38 33.43 V C57
2020-04-19 04:14:17 s 1 +135287.16 0 +277850.19 5660.0 C57
2020-04-19 04:44:17 S 14 43 46.661 +38 36 40.21 V C57
2020-04-19 04:44:17 s 1 +134481.07 5 +279391.52 7070.0 C57
2020-04-19 05:14:17 S 14 43 40.421 +38 34 32.05 V C57
2020-04-19 05:14:17 s 1 +133669.21 2 +280920.76 680.0 C57
2020-04-19 05:44:17 S 14 43 34.085 +38 32 27.28 V C57
2020-04-19 05:44:17 s 1 +132851.66 4 +282437.98 6570.0 C57
2020-04-19 06:14:17 S 14 43 27.878 +38 30 27.65 V C57
2020-04-19 06:14:17 s 1 +132028.52 1 +283943.23 4860.0 C57
2020-04-19 06:44:17 S 14 43 21.881 +38 28 28.24 V C57
2020-04-19 06:44:17 s 1 +131199.87 0 +285436.55 5640.0 C57
2020-04-19 07:48:57 C 14 41 58.61 +38 43 49.6 V 703
2020-04-19 07:56:38 C 14 41 56.72 +38 43 18.6 V 703
2020-04-19 08:04:18 C 14 41 54.82 +38 42 48.0 V 703
2020-04-19 08:11:54 C 14 41 52.94 +38 42 17.3 V 703
2020-04-19 08:14:17 S 14 43 03.240 +38 22 14.23 V C57
2020-04-19 08:14:17 s 1 +128681.74 0 +289845.49 3850.0 C57