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
2018-10-29 04:06:00 C 23 04 33.03 -11 57 08.2 V 703
2018-11-01 11:25:15 C 23 09 53.66 -11 23 53.6 q D29
2018-11-01 11:45:36 C 23 09 54.96 -11 23 44.6 q D29
2018-11-01 12:05:58 C 23 09 56.29 -11 23 35.5 q D29
2018-11-02 03:23:53 C 23 10 57.96 -11 17 04.8 V 703
2018-11-02 03:39:04 C 23 10 58.99 -11 16 56.4 V 703
2018-11-02 03:46:40 C 23 10 59.51 -11 16 53.9 V 703
2018-11-03 07:25:20 C 23 12 51.015 -11 04 57.07 U F52
2018-11-03 07:43:43 C 23 12 52.198 -11 04 49.11 U F52
2018-11-04 04:02:48 C 23 14 14.33 -10 56 00.6 V G96
2018-11-04 04:10:57 C 23 14 14.86 -10 55 57.3 V G96
2018-11-04 04:22:01 C 23 14 15.57 -10 55 52.2 V G96
2018-11-04 04:30:10 C 23 14 16.11 -10 55 48.6 V G96
2018-11-06 08:24:36 C 23 17 45.37 -10 32 52.9 U T08
2018-11-06 08:39:02 C 23 17 46.45 -10 32 47.5 U T08
2018-11-06 08:53:24 C 23 17 47.43 -10 32 40.8 U T08
2018-11-06 08:55:36 C 23 17 47.48 -10 32 41.1 U T08
2018-11-07 08:43:30 C 23 19 23.66 -10 22 03.0 U T05
2018-11-07 08:56:22 C 23 19 24.49 -10 21 58.1 U T05
2018-11-07 09:10:26 C 23 19 25.45 -10 21 51.9 U T05
2018-11-07 09:23:47 C 23 19 26.28 -10 21 44.1 U T05
2018-11-08 08:45:59 C 23 21 00.81 -10 11 15.6 U T05
2018-11-08 09:00:22 C 23 21 01.70 -10 11 08.8 U T05
2018-11-08 09:02:29 C 23 21 01.81 -10 11 08.4 U T05
2018-11-08 09:14:40 C 23 21 02.70 -10 11 02.5 U T05
2018-11-08 09:16:52 C 23 21 02.79 -10 11 01.6 U T05
2018-11-08 09:29:10 C 23 21 03.63 -10 10 56.1 U T05
2018-11-08 09:31:11 C 23 21 03.72 -10 10 55.5 U T05
2018-11-08 09:45:35 C 23 21 04.68 -10 10 48.3 U T05
2018-11-09 03:45:05 C 23 22 17.78 -10 02 41.7 V 703
2018-11-09 03:52:37 C 23 22 18.22 -10 02 38.0 V 703
2018-11-09 04:00:10 C 23 22 18.84 -10 02 35.9 V 703
2018-11-09 04:07:42 C 23 22 19.33 -10 02 31.6 V 703
2018-11-12 04:21:41 C 23 27 11.41 -09 29 25.7 V 703
2018-11-12 04:44:44 C 23 27 12.67 -09 29 14.6 V 703
2018-11-12 08:40:00 C 23 27 28.51 -09 27 25.3 U T05
2018-11-12 08:54:28 C 23 27 29.42 -09 27 18.8 U T05
2018-11-12 09:08:46 C 23 27 30.41 -09 27 12.2 U T05
2018-11-12 09:23:01 C 23 27 31.30 -09 27 05.3 U T05
2018-11-25 10:54:25 S 23 48 41.45 -06 57 38.4 L C51
2018-11-25 14:02:43 S 23 48 54.32 -06 56 05.8 L C51
2018-11-25 17:11:14 S 23 49 06.98 -06 54 33.2 L C51
2018-11-25 23:28:14 S 23 49 32.50 -06 51 30.3 L C51
2018-11-26 02:36:33 S 23 49 45.12 -06 49 58.2 L C51
2018-11-26 05:45:03 S 23 49 57.83 -06 48 26.6 L C51
2018-11-26 08:53:33 S 23 50 10.63 -06 46 51.3 L C51
2018-11-27 02:09:56 S 23 51 20.66 -06 38 27.8 L C51
2018-11-27 02:10:07 S 23 51 20.67 -06 38 26.4 L C51
2018-11-28 04:30:31 C 23 53 07.36 -06 25 38.4 V 703
2018-11-28 04:38:15 C 23 53 07.77 -06 25 35.0 V 703