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
2018-10-03 09:40:19 C 22 22 41.01 -15 20 23.9 U T05
2018-10-03 09:54:45 C 22 22 41.94 -15 20 20.8 U T05
2018-10-03 10:09:17 C 22 22 42.87 -15 20 17.2 U T05
2018-10-03 10:23:51 C 22 22 43.79 -15 20 14.0 U T05
2018-10-05 09:30:36 C 22 25 56.37 -15 09 24.8 U T08
2018-10-05 09:45:00 C 22 25 57.30 -15 09 21.0 U T08
2018-10-05 09:59:47 C 22 25 58.24 -15 09 17.1 U T08
2018-10-05 10:14:22 C 22 25 59.19 -15 09 13.8 U T08
2018-10-06 03:47:13 C 22 27 11.61 -15 05 00.3 V 703
2018-10-06 03:54:51 C 22 27 12.09 -15 04 58.5 V 703
2018-10-06 04:02:29 C 22 27 12.58 -15 04 56.6 V 703
2018-10-06 04:10:08 C 22 27 13.07 -15 04 54.8 V 703
2018-10-10 04:03:19 C 22 33 43.50 -14 39 18.5 V 703
2018-10-10 04:10:54 C 22 33 43.97 -14 39 16.7 V 703
2018-10-10 04:18:30 C 22 33 44.46 -14 39 14.3 V 703
2018-10-10 04:26:05 C 22 33 44.97 -14 39 11.6 V 703
2018-10-11 09:43:11 C 22 35 43.52 -14 30 38.0 U T05
2018-10-11 09:58:30 C 22 35 44.50 -14 30 33.1 U T05
2018-10-11 10:18:46 C 22 35 45.80 -14 30 27.0 U T05
2018-10-11 10:34:10 C 22 35 46.79 -14 30 22.1 U T05
2018-10-12 09:03:06 C 22 37 18.50 -14 23 37.0 U T08
2018-10-12 09:17:15 C 22 37 19.39 -14 23 33.1 U T08
2018-10-12 09:31:59 C 22 37 20.38 -14 23 27.9 U T08
2018-10-12 09:45:59 C 22 37 21.31 -14 23 23.7 U T08
2018-10-14 08:49:35 C 22 40 32.76 -14 08 40.2 U T05
2018-10-14 09:03:42 C 22 40 33.68 -14 08 35.7 U T05
2018-10-14 09:13:01 C 22 40 34.25 -14 08 32.3 U T05
2018-10-14 09:17:44 C 22 40 34.54 -14 08 30.9 U T05
2018-10-14 09:27:06 C 22 40 35.15 -14 08 28.0 U T05
2018-10-14 09:31:44 C 22 40 35.45 -14 08 26.3 U T05
2018-10-14 09:55:13 C 22 40 36.96 -14 08 18.7 U T05
2018-10-15 09:00:22 C 22 42 10.96 -14 00 49.1 U T05
2018-10-15 09:14:52 C 22 42 11.89 -14 00 44.2 U T05
2018-10-15 09:29:19 C 22 42 12.80 -14 00 39.4 U T05
2018-10-15 09:43:54 C 22 42 13.75 -14 00 34.2 U T05
2018-10-16 12:05:22 C 22 44 01.52 -13 51 50.4 q D29
2018-10-16 12:46:05 C 22 44 04.17 -13 51 36.1 q D29
2018-10-26 14:01:06 C 23 00 21.90 -12 22 17.2 q D29
2018-10-26 14:21:27 C 23 00 23.23 -12 22 09.1 q D29
2018-10-26 14:41:50 C 23 00 24.56 -12 22 00.8 q D29
2018-10-26 15:02:30 C 23 00 25.86 -12 21 52.3 q D29
2018-10-26 15:22:52 C 23 00 27.23 -12 21 44.5 q D29
2018-10-26 15:43:13 C 23 00 28.55 -12 21 35.7 q D29
2018-10-27 04:55:11 C 23 01 22.29 -12 16 18.7 V 703
2018-10-27 05:02:27 C 23 01 22.75 -12 16 16.5 V 703
2018-10-27 05:09:42 C 23 01 23.17 -12 16 13.5 V 703
2018-10-27 05:16:58 C 23 01 23.64 -12 16 10.5 V 703
2018-10-29 03:43:14 C 23 04 31.66 -11 57 16.5 V 703
2018-10-29 03:50:49 C 23 04 32.16 -11 57 13.2 V 703
2018-10-29 03:58:24 C 23 04 32.58 -11 57 10.4 V 703