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
2009-06-24 10:41:51 C 01 16 30.82 +07 57 38.7 r G96
2009-06-24 10:45:52 C 01 16 31.29 +07 57 41.0 r G96
2009-06-24 10:49:53 C 01 16 31.76 +07 57 43.2 r G96
2009-09-25 08:11:36 C 03 48 27.01 +13 38 19.7 19.5 c 704
2009-09-25 09:03:29 C 03 48 26.56 +13 38 11.0 20.4 c 704
2009-09-25 09:20:51 C 03 48 26.48 +13 38 07.2 19.8 c 704
2009-09-28 09:07:11 C 03 47 47.68 +13 24 30.6 r 703
2009-09-28 09:18:34 C 03 47 47.65 +13 24 27.9 r 703
2009-09-28 09:30:01 C 03 47 47.40 +13 24 26.3 r 703
2009-09-28 09:41:18 C 03 47 47.25 +13 24 25.0 r 703
2009-10-14 08:51:57 C 03 37 50.73 +11 58 24.1 r G96
2009-10-14 09:01:50 C 03 37 50.34 +11 58 22.0 r G96
2009-10-14 09:11:51 C 03 37 49.94 +11 58 19.5 r G96
2009-10-14 09:21:47 C 03 37 49.54 +11 58 17.0 r G96
2009-10-20 06:47:44 C 03 31 50.96 +11 23 25.5 19.5 c 704
2009-10-20 07:07:01 C 03 31 50.12 +11 23 21.0 19.8 c 704
2009-10-20 07:26:22 C 03 31 49.15 +11 23 16.6 19.9 c 704
2009-10-20 07:45:43 C 03 31 48.22 +11 23 11.7 19.9 c 704
2009-10-24 07:35:11 C 03 27 16.45 +10 59 43.4 r 703
2009-10-24 07:50:19 C 03 27 15.66 +10 59 39.8 r 703
2009-10-24 08:05:26 C 03 27 14.90 +10 59 35.7 r 703
2009-10-24 08:20:31 C 03 27 14.14 +10 59 32.2 r 703
2009-10-25 09:08:02 C 03 26 00.88 +10 53 32.8 r 703
2009-10-25 09:19:33 C 03 26 00.42 +10 53 30.1 r 703
2009-10-25 09:30:48 C 03 25 59.77 +10 53 28.1 r 703
2009-10-25 09:42:16 C 03 25 59.16 +10 53 25.8 r 703
2009-10-27 00:39:43 C 03 24 02.75 +10 44 05.4 w 160
2009-10-27 00:43:42 C 03 24 02.52 +10 44 04.5 w 160
2009-10-27 07:01:22 C 03 23 43.73 +10 42 37.8 19.0 c 704
2009-10-27 07:20:53 C 03 23 42.67 +10 42 32.2 19.4 c 704
2009-10-27 08:00:07 C 03 23 40.64 +10 42 23.2 19.4 c 704
2009-10-27 08:19:40 C 03 23 39.64 +10 42 18.8 19.5 c 704
2009-11-09 06:07:18 C 03 07 51.31 +09 36 48.2 r 703
2009-11-09 06:19:48 C 03 07 50.59 +09 36 45.9 r 703
2009-11-09 06:32:08 C 03 07 49.98 +09 36 43.7 r 703
2009-11-09 06:44:34 C 03 07 49.33 +09 36 41.6 r 703
2009-11-09 19:50:00 C 03 07 10.78 +09 34 21.1 r J75
2009-11-09 20:07:09 C 03 07 09.89 +09 34 18.1 r J75
2009-11-09 20:24:16 C 03 07 09.14 +09 34 14.2 r J75
2009-11-14 06:28:35 C 03 02 03.72 +09 17 04.0 19.2 c 704
2009-11-14 06:46:21 C 03 02 02.89 +09 17 00.8 19.8 c 704
2009-11-14 07:21:31 C 03 02 01.17 +09 16 55.6 19.4 c 704
2009-11-19 06:04:24 C 02 56 47.50 +09 01 33.9 19.5 c 704
2009-11-19 06:22:14 C 02 56 46.83 +09 01 33.0 19.7 c 704
2009-11-19 06:39:57 C 02 56 46.01 +09 01 31.8 19.6 c 704
2009-11-19 06:57:41 C 02 56 45.20 +09 01 29.0 19.6 c 704
2009-11-19 21:00:10 C 02 56 10.77 +08 59 56.7 r J75
2009-11-19 21:18:44 C 02 56 09.99 +08 59 54.6 r J75
2009-11-19 21:37:18 C 02 56 09.21 +08 59 53.4 r J75
2009-11-25 00:31:31 C 02 51 28.54 +08 49 13.3 19.4 o C20