216689 (2004 HM1)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5322677910 ± 1.36e-08
Semi-major axis (a)2.7624563117 AU ± 5.91e-09
Inclination (i)4.17040853° ± 1.79e-06
Long. of Asc. Node (Ω)151.80830158° ± 1.47e-05
Arg. of Perihelion (ω)159.66458610° ± 1.53e-05
Mean Anomaly (M)210.61773796° ± 1.88e-06
Mean Motion (n)0.2146689088°/day ± 6.89e-10
Perihelion dist (q)1.29208979 AU ± 3.78e-08
Aphelion dist (Q)4.23282283 AU ± 3.88e-08
Orbital Period4.59137883 yr ± 1.47e-08
Physical Parameters
H (abs. magnitude)17.00
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.201″
Uncertainty0
Orbit TypeAmor
MOID0.277255 AU
Observations Used433
Oppositions23
Arc Total1995-2024
First Observation Used1995-09-20
Last Observation Used2024-01-01
Observations (488)
Date Type RA Dec Mag Band Observatory
2018-09-16 05:46:20 C 21 54 17.95 -16 07 41.6 V G96
2018-09-16 05:53:48 C 21 54 18.43 -16 07 41.6 V G96
2018-09-16 09:39:45 C 21 54 33.89 -16 07 38.7 U T05
2018-09-16 09:54:28 C 21 54 34.83 -16 07 38.5 U T05
2018-09-16 10:08:29 C 21 54 35.72 -16 07 38.4 U T05
2018-09-16 10:23:04 C 21 54 36.66 -16 07 38.3 U T05
2018-09-17 10:08:11 C 21 56 15.87 -16 07 28.1 U T05
2018-09-17 10:22:32 C 21 56 16.79 -16 07 27.8 U T05
2018-09-17 10:37:03 C 21 56 17.73 -16 07 27.4 U T05
2018-09-18 09:26:07 C 21 57 53.24 -16 06 57.5 U T08
2018-09-18 09:40:52 C 21 57 54.18 -16 06 57.6 U T08
2018-09-18 09:44:53 C 21 57 54.47 -16 06 57.1 U T08
2018-09-18 09:54:58 C 21 57 55.08 -16 06 56.6 U T08
2018-09-18 09:59:39 C 21 57 55.39 -16 06 56.1 U T08
2018-09-18 10:09:40 C 21 57 56.04 -16 06 55.8 U T08
2018-09-18 10:13:46 C 21 57 56.29 -16 06 55.7 U T08
2018-09-18 10:28:27 C 21 57 57.23 -16 06 55.3 U T08
2018-09-19 09:48:28 C 21 59 34.66 -16 06 04.4 U T08
2018-09-19 10:02:50 C 21 59 35.59 -16 06 03.4 U T08
2018-09-19 10:05:03 C 21 59 35.75 -16 06 03.3 U T08
2018-09-19 10:17:21 C 21 59 36.51 -16 06 03.1 U T08
2018-09-19 10:19:21 C 21 59 36.66 -16 06 02.5 U T08
2018-09-19 10:31:51 C 21 59 37.47 -16 06 01.6 U T08
2018-09-19 10:33:51 C 21 59 37.61 -16 06 01.9 U T08
2018-09-19 10:48:24 C 21 59 38.52 -16 06 01.0 U T08
2018-09-20 09:15:31 C 22 01 12.50 -16 04 53.3 U T05
2018-09-20 09:29:26 C 22 01 13.38 -16 04 52.4 U T05
2018-09-20 09:43:24 C 22 01 14.28 -16 04 51.6 U T05
2018-09-20 09:57:19 C 22 01 15.17 -16 04 50.5 U T05
2018-09-29 05:34:20 C 22 15 51.03 -15 40 05.8 V 703
2018-09-29 05:42:12 C 22 15 51.54 -15 40 04.4 V 703
2018-09-29 05:50:02 C 22 15 52.03 -15 40 03.1 V 703
2018-09-29 05:57:53 C 22 15 52.55 -15 40 01.6 V 703
2018-09-29 13:08:46 C 22 16 22.46 -15 38 46.3 q D29
2018-09-29 13:29:08 C 22 16 23.77 -15 38 42.8 q D29
2018-09-29 13:49:29 C 22 16 25.07 -15 38 39.2 q D29
2018-09-29 22:26:24 C 22 17 00.58 -15 37 06.1 o Z22
2018-09-29 22:32:36 C 22 17 01.00 -15 37 05.2 o Z22
2018-09-29 22:56:23 C 22 17 02.48 -15 37 01.0 o Z22
2018-10-01 09:45:49 C 22 19 24.89 -15 30 22.5 U T08
2018-10-01 10:00:11 C 22 19 25.81 -15 30 20.1 U T08
2018-10-01 10:02:23 C 22 19 25.95 -15 30 19.3 U T08
2018-10-01 10:14:45 C 22 19 26.75 -15 30 16.5 U T08
2018-10-01 10:16:46 C 22 19 26.88 -15 30 16.0 U T08
2018-10-01 10:29:16 C 22 19 27.68 -15 30 13.6 U T08
2018-10-01 10:31:20 C 22 19 27.81 -15 30 13.4 U T08
2018-10-01 10:45:52 C 22 19 28.74 -15 30 10.5 U T08
2018-10-03 07:08:40 C 22 22 31.371 -15 20 57.40 U F52
2018-10-03 07:26:30 C 22 22 32.506 -15 20 53.50 U F52
2018-10-03 07:44:23 C 22 22 33.640 -15 20 49.66 U F52