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
2018-11-28 04:45:59 C 23 53 08.33 -06 25 30.4 V 703
2018-11-28 04:53:43 C 23 53 08.84 -06 25 26.5 V 703
2019-01-25 05:22:29 C 01 28 10.491 +04 51 00.93 U F51
2019-01-25 05:28:23 C 01 28 10.862 +04 51 03.56 U F51
2019-01-25 05:34:16 C 01 28 11.268 +04 51 06.12 U F51
2019-01-25 05:40:12 C 01 28 11.659 +04 51 08.77 U F51
2022-04-25 06:00:42 C 11 19 45.961 +07 23 29.45 U F52
2022-04-25 06:18:03 C 11 19 45.567 +07 23 31.77 U F52
2022-04-25 06:35:33 C 11 19 45.216 +07 23 34.29 U F52
2023-09-16 11:27:31 C 05 16 30.983 +18 17 56.15 V G96
2023-09-16 11:39:55 C 05 16 31.346 +18 17 55.97 V G96
2023-09-16 11:47:22 C 05 16 31.552 +18 17 55.64 V G96
2023-09-16 11:54:48 C 05 16 31.771 +18 17 54.85 V G96
2023-10-22 11:24:08 C 05 21 44.618 +17 10 03.63 X F52
2023-10-22 11:39:45 C 05 21 44.310 +17 10 02.26 X F52
2023-10-22 11:55:22 C 05 21 43.984 +17 10 00.78 X F52
2023-10-22 12:11:03 C 05 21 43.663 +17 09 59.40 X F52
2023-12-04 08:56:23 C 04 40 07.936 +15 37 54.62 V G96
2023-12-04 09:03:48 C 04 40 07.558 +15 37 53.80 V G96
2023-12-04 09:11:14 C 04 40 07.180 +15 37 53.44 V G96
2023-12-04 09:18:40 C 04 40 06.812 +15 37 53.08 V G96
2023-12-05 08:45:11 C 04 38 59.026 +15 36 24.81 X F52
2023-12-05 09:03:02 C 04 38 58.142 +15 36 23.75 X F52
2023-12-05 09:20:58 C 04 38 57.248 +15 36 22.66 X F52
2023-12-09 11:38:33 C 04 34 18.424 +15 30 43.58 X F52
2023-12-09 11:55:13 C 04 34 17.635 +15 30 42.85 X F52
2023-12-09 12:11:54 C 04 34 16.854 +15 30 41.83 X F52
2023-12-09 12:28:34 C 04 34 16.062 +15 30 41.08 X F52
2023-12-16 06:45:42 C 04 27 09.897 +15 23 46.38 X F52
2023-12-16 07:01:32 C 04 27 09.225 +15 23 45.98 X F52
2023-12-16 07:17:22 C 04 27 08.567 +15 23 45.42 X F52
2023-12-17 06:17:05 C 04 26 12.210 +15 23 02.29 V G96
2023-12-17 06:24:39 C 04 26 11.897 +15 23 02.00 V G96
2023-12-17 06:32:12 C 04 26 11.569 +15 23 01.72 V G96
2023-12-17 06:39:44 C 04 26 11.260 +15 23 01.61 V G96
2024-01-01 05:37:50 C 04 14 26.381 +15 21 18.93 X F51
2024-01-01 06:15:07 C 04 14 25.440 +15 21 19.77 X F51
2024-01-01 06:33:47 C 04 14 24.951 +15 21 20.10 X F51