211871 (2004 HO)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5114667127 ± 2.53e-08
Semi-major axis (a)1.8469469255 AU ± 1.89e-09
Inclination (i)7.88165729° ± 7.10e-06
Long. of Asc. Node (Ω)146.05128755° ± 6.43e-05
Arg. of Perihelion (ω)163.87539517° ± 6.30e-05
Mean Anomaly (M)171.85638162° ± 5.77e-06
Mean Motion (n)0.3926726495°/day ± 6.03e-10
Perihelion dist (q)0.90229505 AU ± 4.67e-08
Aphelion dist (Q)2.79159880 AU ± 4.68e-08
Orbital Period2.51004567 yr ± 3.85e-09
Physical Parameters
H (abs. magnitude)18.85
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.433″
Uncertainty0
Orbit TypeApollo
MOID0.062018 AU
Observations Used274
Oppositions16
Arc Total1999-2025
First Observation Used1999-03-20
Last Observation Used2025-01-31
Observations (296)
Date Type RA Dec Mag Band Observatory
2019-11-21 06:24:20 C 23 48 28.569 -19 30 42.94 U F51
2019-11-21 06:40:22 C 23 48 30.878 -19 30 21.47 U F51
2019-11-21 06:56:23 C 23 48 33.172 -19 30 00.16 U F51
2019-11-29 06:22:08 C 00 14 14.824 -15 28 31.99 U F52
2019-11-29 06:54:17 C 00 14 18.642 -15 27 53.63 U F52
2019-11-29 07:10:19 C 00 14 20.548 -15 27 34.37 U F52
2019-12-29 05:39:08 C 01 24 49.628 -03 41 20.58 U F52
2019-12-29 05:56:25 C 01 24 51.012 -03 41 06.55 U F52
2019-12-29 06:14:11 C 01 24 52.483 -03 40 52.33 U F52
2024-03-05 09:58:48 C 12 54 00.169 +02 45 51.98 V G96
2024-03-05 10:06:16 C 12 53 59.953 +02 45 56.27 V G96
2024-03-05 10:13:44 C 12 53 59.683 +02 45 59.62 V G96
2024-03-05 10:21:12 C 12 53 59.438 +02 46 04.12 V G96
2024-03-16 12:41:09 C 12 43 48.494 +05 16 05.44 X F52
2024-03-16 12:58:05 C 12 43 47.665 +05 16 15.83 X F52
2024-03-16 13:15:01 C 12 43 46.836 +05 16 26.30 X F52
2024-03-16 13:31:56 C 12 43 46.003 +05 16 36.69 X F52
2024-04-09 07:23:39 C 12 10 11.828 +11 22 17.25 X F52
2024-04-09 07:39:44 C 12 10 10.768 +11 22 26.86 X F52
2024-04-09 07:55:48 C 12 10 09.701 +11 22 36.21 X F52
2024-04-11 07:01:16 C 12 07 09.332 +11 49 49.51 V G96
2024-04-11 07:08:42 C 12 07 08.857 +11 49 53.29 V G96
2024-04-11 07:16:08 C 12 07 08.360 +11 49 57.65 V G96
2024-04-11 07:23:33 C 12 07 07.878 +11 50 01.75 V G96
2024-04-29 08:51:39 C 11 43 30.975 +14 55 51.68 X F51
2024-04-29 09:07:44 C 11 43 30.263 +14 55 56.06 X F51
2024-04-29 09:23:36 C 11 43 29.554 +14 56 00.32 X F51
2024-04-29 09:39:31 C 11 43 28.847 +14 56 04.70 X F51
2024-06-03 04:28:19 C 11 36 17.521 +14 51 01.80 V G96
2024-06-03 04:36:25 C 11 36 17.719 +14 51 00.25 V G96
2024-06-03 04:44:31 C 11 36 17.838 +14 50 58.16 V G96
2024-06-03 04:52:37 C 11 36 18.076 +14 50 55.68 V G96
2024-11-27 05:27:45 C 23 33 00.026 -18 12 39.31 X F51
2024-11-27 05:36:10 C 23 33 01.334 -18 12 29.36 X F51
2024-11-27 05:44:34 C 23 33 02.639 -18 12 19.14 X F51
2024-11-27 05:53:00 C 23 33 03.971 -18 12 08.77 X F51
2024-12-03 02:28:39 C 23 54 13.590 -15 24 50.72 V G96
2024-12-03 02:36:49 C 23 54 14.731 -15 24 41.47 V G96
2024-12-03 02:44:59 C 23 54 15.851 -15 24 32.08 V G96
2024-12-03 02:53:08 C 23 54 16.996 -15 24 22.61 V G96
2024-12-20 05:39:58 C 00 44 32.881 -08 11 09.28 X F52
2024-12-20 06:20:55 C 00 44 37.181 -08 10 30.14 X F52
2024-12-20 06:41:19 C 00 44 39.320 -08 10 10.61 X F52
2025-01-31 01:07:14 C 02 15 56.28 +04 36 25.4 X W84
2025-01-31 01:19:35 C 02 15 57.28 +04 36 33.0 X W84
2025-01-31 01:44:24 C 02 15 59.30 +04 36 48.1 X W84