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
1995-09-20 13:48:59 00 15 02.76 -04 15 58.8 16.5 z 400
1995-09-20 14:15:00 00 15 02.30 -04 16 06.7 z 400
1995-09-21 13:52:00 00 14 44.64 -04 23 40.1 16.5 z 400
1995-09-21 14:15:59 00 14 44.26 -04 23 48.5 z 400
2004-03-31 10:18:27 C 14 11 30.14 -07 24 20.2 c 691
2004-03-31 10:57:17 C 14 11 29.00 -07 24 09.7 c 691
2004-03-31 11:35:31 C 14 11 27.93 -07 23 58.8 c 691
2004-04-19 07:24:00 C 13 54 44.02 -05 01 13.9 19.1 c 704
2004-04-19 07:43:18 C 13 54 43.18 -05 01 06.9 19.3 c 704
2004-04-19 08:00:01 C 13 54 42.38 -05 01 01.3 19.5 c 704
2004-04-19 08:16:02 C 13 54 41.67 -05 00 56.5 19.4 c 704
2004-04-19 08:32:14 C 13 54 40.89 -05 00 51.3 18.9 c 704
2004-04-20 07:26:11 C 13 53 39.76 -04 53 03.4 20.2 c 704
2004-04-20 07:41:47 C 13 53 39.07 -04 52 58.7 19.9 c 704
2004-04-20 07:57:13 C 13 53 38.41 -04 52 51.9 19.9 c 704
2004-04-20 08:13:11 C 13 53 37.61 -04 52 47.2 20.2 c 704
2004-04-22 07:30:07 C 13 51 29.66 -04 36 41.7 19.0 c 704
2004-04-22 08:15:09 C 13 51 27.47 -04 36 26.1 19.4 c 704
2004-04-22 08:30:26 C 13 51 26.77 -04 36 20.7 19.5 c 704
2004-04-23 06:15:40 C 13 50 27.46 -04 28 58.1 c 691
2004-04-23 07:07:18 C 13 50 25.00 -04 28 40.8 c 691
2004-04-23 07:49:11 C 13 50 22.99 -04 28 26.5 c 691
2004-05-08 21:00:45 C 13 33 30.31 -02 32 08.7 r 170
2004-05-08 21:02:22 C 13 33 30.23 -02 32 08.3 r 170
2004-05-08 21:03:59 C 13 33 30.16 -02 32 07.8 r 170
2004-05-08 21:05:36 C 13 33 30.09 -02 32 07.4 r 170
2004-05-10 23:17:20 C 13 31 24.56 -02 19 00.9 r 240
2004-05-10 23:26:22 C 13 31 24.22 -02 18 59.4 r 240
2004-05-10 23:29:58 C 13 31 24.09 -02 18 58.5 r 240
2004-05-18 06:36:31 C 13 24 50.22 -01 40 13.0 o 704
2004-05-18 06:50:01 C 13 24 49.78 -01 40 11.9 o 704
2004-05-18 07:03:23 C 13 24 49.33 -01 40 09.0 o 704
2004-05-18 07:16:45 C 13 24 48.86 -01 40 04.9 o 704
2004-05-18 07:30:09 C 13 24 48.47 -01 40 03.2 o 704
2004-05-22 05:01:11 C 13 21 52.67 -01 24 29.3 19.8 c 704
2004-05-22 05:13:52 C 13 21 52.28 -01 24 25.6 20.4 c 704
2004-05-22 05:26:29 C 13 21 51.95 -01 24 25.8 20.2 c 704
2004-05-22 05:52:48 C 13 21 51.10 -01 24 22.2 20.3 c 704
2005-12-02 11:18:53 C 06 46 46.87 +18 07 33.2 F65
2005-12-02 11:20:49 C 06 46 46.80 +18 07 33.5 F65
2005-12-02 11:22:54 C 06 46 46.70 +18 07 33.6 F65
2005-12-02 11:24:50 C 06 46 46.65 +18 07 33.7 F65
2005-12-02 11:26:39 C 06 46 46.60 +18 07 33.9 F65
2005-12-02 11:28:20 C 06 46 46.54 +18 07 34.0 F65
2008-02-08 08:18:10 C 11 27 49.32 +04 33 48.4 o 291
2008-02-08 08:38:30 C 11 27 48.85 +04 33 51.8 o 291
2008-02-08 08:58:27 C 11 27 48.31 +04 33 55.2 o 291
2009-04-21 11:00:04 C 21 43 19.76 -10 21 12.0 r 448
2009-04-21 11:25:21 C 21 43 23.49 -10 20 55.1 r 448
2009-06-24 10:37:49 C 01 16 30.32 +07 57 36.4 r G96