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
2022-12-01 14:27:43 C 08 42 15.377 +63 44 24.35 U F52
2022-12-01 14:46:06 C 08 42 16.220 +63 44 43.86 U F52
2022-12-01 15:04:32 C 08 42 17.074 +63 45 03.43 U F52
2022-12-15 13:49:06 C 08 54 35.393 +69 54 25.52 U F52
2022-12-15 14:09:18 C 08 54 35.691 +69 54 48.26 U F52
2022-12-15 14:29:27 C 08 54 36.000 +69 55 10.94 U F52
2023-03-31 06:13:13 C 06 44 24.694 +70 02 44.78 U F52
2023-03-31 06:46:32 C 06 44 30.581 +70 02 12.99 U F52
2023-03-31 07:03:05 C 06 44 33.396 +70 01 58.04 U F52
2023-04-15 03:59:32 C 07 47 11.717 +63 24 33.62 V 703
2023-04-15 04:07:14 C 07 47 12.916 +63 24 22.03 V 703
2023-04-15 04:14:55 C 07 47 14.345 +63 24 11.99 V 703
2023-04-15 04:22:37 C 07 47 15.623 +63 24 02.34 V 703
2023-04-18 04:11:52 C 07 59 01.914 +61 45 57.17 V 703
2023-04-18 04:20:10 C 07 59 03.296 +61 45 44.57 V 703
2023-04-18 04:28:28 C 07 59 04.690 +61 45 33.08 V 703
2023-04-18 04:36:45 C 07 59 05.870 +61 45 21.35 V 703
2023-04-22 04:13:18 C 08 14 14.683 +59 24 37.69 V 703
2023-04-22 04:21:44 C 08 14 15.767 +59 24 23.69 V 703
2023-04-22 04:30:09 C 08 14 17.214 +59 24 10.48 V 703
2023-04-22 04:38:34 C 08 14 18.478 +59 23 58.31 V 703
2023-05-02 05:06:12 C 08 49 37.513 +52 37 45.70 V G96
2023-05-02 05:13:15 C 08 49 38.500 +52 37 32.48 V G96
2023-05-02 05:20:19 C 08 49 39.450 +52 37 19.24 V G96
2023-05-20 06:02:05 C 09 43 57.192 +37 27 23.15 V T05
2023-05-20 06:17:53 C 09 43 58.982 +37 26 46.28 V T05
2023-05-20 06:40:46 C 09 44 01.543 +37 25 53.18 V T05
2023-05-20 06:42:44 C 09 44 01.709 +37 25 48.07 V T05
2025-09-30 09:57:12 C 06 02 13.506 +41 51 38.09 V V00
2025-09-30 10:05:17 C 06 02 13.801 +41 51 42.34 V V00
2025-09-30 10:13:20 C 06 02 14.122 +41 51 46.91 V V00
2025-10-21 09:53:29 C 06 16 04.681 +47 09 14.87 V V00
2025-10-21 10:01:35 C 06 16 04.796 +47 09 20.66 V V00
2025-10-21 10:17:40 C 06 16 04.987 +47 09 32.29 V V00
2025-10-30 18:46:40 C 06 17 46.223 +49 57 15.13 W O18
2025-10-30 19:54:51 C 06 17 46.038 +49 58 08.99 W O18
2025-11-01 20:06:47 C 06 17 37.670 +50 36 09.92 W O18
2025-11-01 21:09:44 C 06 17 37.241 +50 37 00.16 W O18
2025-12-03 09:12:16 C 05 40 19.989 +60 53 35.49 X F52
2025-12-03 09:48:00 C 05 40 16.181 +60 54 01.03 X F52
2025-12-03 10:05:34 C 05 40 14.267 +60 54 13.77 X F52
2025-12-13 09:17:28 C 05 11 23.829 +63 18 30.15 X F51
2025-12-13 09:37:28 C 05 11 21.037 +63 18 39.94 X F51
2025-12-13 09:57:29 C 05 11 18.246 +63 18 49.64 X F51
2025-12-13 10:17:28 C 05 11 15.467 +63 18 59.21 X F51