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
2018-07-23 12:51:56 C 20 25 04.46 -09 42 06.7 U T05
2018-07-23 21:37:22 C 20 25 38.79 -09 44 36.4 V C27
2018-07-23 22:11:22 C 20 25 40.72 -09 44 46.2 V C27
2018-07-23 22:58:15 C 20 25 43.32 -09 44 59.4 V C27
2018-07-24 09:30:33 C 20 26 22.51 -09 47 45.1 U T08
2018-07-24 09:42:33 C 20 26 23.12 -09 47 48.7 U T08
2018-07-24 09:55:12 C 20 26 23.81 -09 47 52.3 U T08
2018-07-24 10:07:09 C 20 26 24.40 -09 47 55.9 U T08
2018-07-25 10:58:20 C 20 27 56.60 -09 55 04.5 U T08
2018-07-25 11:13:33 C 20 27 57.42 -09 55 08.8 U T08
2018-07-25 11:28:18 C 20 27 58.22 -09 55 13.1 U T08
2018-07-25 11:42:58 C 20 27 59.02 -09 55 17.3 U T08
2018-07-30 11:59:53 C 20 35 34.69 -10 34 36.4 U T05
2018-07-30 12:11:11 C 20 35 35.32 -10 34 40.5 U T05
2018-07-30 12:23:34 C 20 35 36.03 -10 34 45.1 U T05
2018-07-30 12:24:14 C 20 35 36.06 -10 34 45.0 U T05
2018-07-30 12:37:14 C 20 35 36.80 -10 34 49.4 U T05
2018-08-03 12:13:43 C 20 41 47.76 -11 10 41.9 U T05
2018-08-03 12:24:59 C 20 41 48.41 -11 10 46.2 U T05
2018-08-03 12:36:58 C 20 41 49.10 -11 10 50.9 U T05
2018-08-03 12:48:55 C 20 41 49.81 -11 10 55.3 U T05
2018-08-04 15:17:09 C 20 43 35.17 -11 21 30.0 q D29
2018-08-04 15:37:32 C 20 43 36.34 -11 21 38.2 q D29
2018-08-04 15:57:54 C 20 43 37.52 -11 21 46.4 q D29
2018-08-06 11:48:59 C 20 46 29.89 -11 39 26.0 U T08
2018-08-06 12:03:56 C 20 46 30.76 -11 39 32.0 U T08
2018-08-06 12:19:49 C 20 46 31.69 -11 39 38.2 U T08
2018-08-06 12:35:00 C 20 46 32.59 -11 39 44.3 U T08
2018-08-08 11:55:31 C 20 49 41.29 -11 59 20.3 U T05
2018-08-08 12:10:58 C 20 49 42.21 -11 59 26.6 U T05
2018-08-08 12:26:25 C 20 49 43.13 -11 59 32.8 U T05
2018-08-08 12:41:52 C 20 49 44.04 -11 59 38.9 U T05
2018-08-10 11:35:50 C 20 52 52.63 -12 19 17.7 U T08
2018-08-10 11:50:45 C 20 52 53.52 -12 19 23.8 U T08
2018-08-10 12:06:37 C 20 52 54.46 -12 19 30.3 U T08
2018-08-10 12:21:47 C 20 52 55.37 -12 19 36.5 U T08
2018-08-14 11:30:17 C 20 59 22.08 -12 59 25.6 U T08
2018-08-14 11:45:29 C 20 59 23.01 -12 59 31.8 U T08
2018-08-14 12:01:22 C 20 59 23.97 -12 59 38.2 U T08
2018-08-14 12:16:37 C 20 59 24.91 -12 59 44.2 U T08
2018-08-18 10:54:35 C 21 05 55.85 -13 38 02.4 U T08
2018-08-18 11:10:20 C 21 05 56.82 -13 38 08.4 U T08
2018-08-18 11:24:53 C 21 05 57.72 -13 38 14.0 U T08
2018-08-18 11:40:05 C 21 05 58.66 -13 38 19.8 U T08
2018-08-20 11:01:38 C 21 09 16.28 -13 56 34.7 U T05
2018-08-20 11:16:55 C 21 09 17.22 -13 56 40.5 U T05
2018-08-20 11:31:31 C 21 09 18.14 -13 56 45.3 U T05
2018-08-20 11:46:59 C 21 09 19.09 -13 56 51.1 U T05
2018-08-21 10:10:13 C 21 10 53.45 -14 05 11.9 U T08
2018-08-21 10:24:55 C 21 10 54.36 -14 05 17.2 U T08