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
2009-11-25 00:35:44 C 02 51 28.35 +08 49 12.8 19.7 o C20
2010-01-31 06:31:33 S 02 59 45.482 +12 11 52.94 L C51
2010-01-31 09:42:04 S 02 59 52.351 +12 12 38.88 L C51
2010-01-31 19:13:48 S 03 00 12.895 +12 14 47.65 L C51
2010-01-31 22:24:19 S 03 00 19.687 +12 15 32.69 L C51
2010-02-01 03:10:11 S 03 00 30.211 +12 16 40.30 L C51
2010-02-01 06:20:42 S 03 00 37.046 +12 17 27.06 L C51
2010-02-01 09:31:24 S 03 00 44.160 +12 18 10.22 L C51
2010-02-06 04:29:12 C 03 05 04.17 +12 45 07.6 o 691
2010-02-06 04:40:38 C 03 05 04.61 +12 45 10.3 o 691
2013-03-13 06:05:34 C 12 58 08.53 -02 20 32.3 o 691
2013-03-13 06:30:58 C 12 58 07.76 -02 20 25.7 o 691
2013-03-13 06:56:22 C 12 58 06.98 -02 20 18.9 o 691
2013-03-19 11:46:10 C 12 53 15.281 -01 38 22.42 L F51
2013-03-19 11:51:50 C 12 53 15.066 -01 38 20.62 L F51
2013-03-19 12:08:21 C 12 53 14.464 -01 38 15.71 L F51
2013-03-19 12:14:02 C 12 53 14.261 -01 38 14.03 L F51
2013-03-19 12:30:32 C 12 53 13.661 -01 38 09.10 L F51
2013-03-19 12:36:14 C 12 53 13.449 -01 38 07.44 L F51
2013-03-19 12:52:46 C 12 53 12.854 -01 38 02.54 L F51
2013-03-19 12:58:26 C 12 53 12.653 -01 38 01.02 L F51
2013-03-31 06:29:02 C 12 42 23.50 -00 10 29.6 u G96
2013-03-31 06:42:44 C 12 42 22.96 -00 10 25.1 u G96
2013-03-31 06:56:32 C 12 42 22.35 -00 10 20.4 u G96
2013-03-31 07:10:26 C 12 42 21.81 -00 10 16.6 u G96
2013-04-11 08:48:49 C 12 31 15.535 +01 13 56.48 L F51
2013-04-11 09:08:32 C 12 31 14.694 +01 14 02.56 L F51
2013-04-11 09:28:12 C 12 31 13.842 +01 14 08.56 L F51
2013-04-11 09:48:03 C 12 31 12.990 +01 14 14.66 L F51
2013-04-13 23:10:54 C 12 28 41.00 +01 32 45.8 c J04
2013-04-13 23:32:34 C 12 28 40.05 +01 32 52.4 c J04
2013-04-13 23:49:14 C 12 28 39.35 +01 32 57.2 c J04
2013-04-14 00:05:54 C 12 28 38.65 +01 33 02.3 c J04
2018-06-14 03:41:32 C 19 29 54.87 -10 11 49.9 V G40
2018-06-14 03:51:52 C 19 29 55.43 -10 11 47.1 V G40
2018-06-14 04:01:33 C 19 29 55.96 -10 11 44.7 V G40
2018-06-21 12:58:53 C 19 40 15.08 -09 30 27.8 U T05
2018-06-21 13:00:13 C 19 40 15.15 -09 30 27.6 U T05
2018-06-21 13:14:05 C 19 40 15.88 -09 30 24.7 U T05
2018-06-21 13:16:20 C 19 40 15.99 -09 30 24.3 U T05
2018-06-21 13:29:48 C 19 40 16.69 -09 30 21.5 U T05
2018-06-21 13:31:09 C 19 40 16.76 -09 30 21.2 U T05
2018-06-21 13:46:54 C 19 40 17.59 -09 30 17.9 U T05
2018-06-23 12:49:09 C 19 43 00.85 -09 21 15.5 U T08
2018-06-23 13:05:19 C 19 43 01.68 -09 21 12.5 U T08
2018-06-23 13:20:08 C 19 43 02.45 -09 21 09.7 U T08
2018-06-23 13:35:16 C 19 43 03.22 -09 21 06.8 U T08
2018-06-24 11:43:09 C 19 44 20.48 -09 17 12.5 U T05
2018-06-24 12:06:01 C 19 44 21.66 -09 17 08.5 U T05
2018-06-24 12:17:47 C 19 44 22.26 -09 17 06.6 U T05