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
2014-11-11 07:40:54 C 00 03 25.558 -22 27 16.54 L F51
2014-11-11 07:56:06 C 00 03 27.529 -22 26 53.32 L F51
2014-11-19 03:25:47 C 00 25 56.16 -17 59 41.9 R G45
2014-11-19 03:35:21 C 00 25 57.16 -17 59 29.7 R G45
2014-11-19 03:41:18 C 00 25 57.68 -17 59 21.8 R G45
2014-11-19 03:47:34 C 00 25 58.37 -17 59 14.2 R G45
2014-11-19 03:53:32 C 00 25 59.07 -17 59 06.2 R G45
2014-11-20 04:33:51 C 00 28 35.27 -17 26 47.9 q 703
2014-11-20 04:44:48 C 00 28 36.48 -17 26 34.3 q 703
2014-11-20 04:55:43 C 00 28 37.47 -17 26 19.4 q 703
2014-11-20 05:06:37 C 00 28 38.63 -17 26 05.6 q 703
2019-03-29 07:40:32 C 12 44 56.19 +07 22 10.8 V G96
2019-03-29 07:47:55 C 12 44 55.75 +07 22 15.7 V G96
2019-03-29 07:55:18 C 12 44 55.30 +07 22 21.0 V G96
2019-03-29 08:02:41 C 12 44 54.86 +07 22 25.8 V G96
2019-03-29 09:02:49 C 12 44 51.15 +07 23 08.1 V 703
2019-03-29 09:25:33 C 12 44 49.89 +07 23 22.8 V 703
2019-04-03 08:19:38 C 12 37 36.134 +08 46 08.33 U F51
2019-04-03 08:37:39 C 12 37 34.957 +08 46 20.76 U F51
2019-04-03 08:55:44 C 12 37 33.773 +08 46 33.35 U F51
2019-04-03 09:13:57 C 12 37 32.568 +08 46 45.96 U F51
2019-04-04 07:03:19 C 12 36 09.47 +09 01 49.6 V G96
2019-04-04 07:11:26 C 12 36 08.87 +09 01 55.5 V G96
2019-04-04 07:19:32 C 12 36 08.36 +09 02 00.8 V G96
2019-04-04 07:27:40 C 12 36 07.82 +09 02 06.1 V G96
2019-04-09 07:03:34 C 12 28 22.05 +10 23 03.3 V 703
2019-04-09 07:26:14 C 12 28 20.59 +10 23 19.0 V 703
2019-04-11 08:09:27 C 12 25 08.22 +10 54 59.3 V G96
2019-04-11 08:16:51 C 12 25 07.72 +10 55 04.4 V G96
2019-04-11 08:30:59 C 12 25 06.78 +10 55 13.3 V G96
2019-04-11 08:38:24 C 12 25 06.22 +10 55 18.3 V G96
2019-04-24 06:27:53 C 12 05 38.692 +13 47 16.30 U F51
2019-04-24 06:44:53 C 12 05 37.663 +13 47 24.18 U F51
2019-04-24 07:02:01 C 12 05 36.638 +13 47 31.89 U F51
2019-04-28 05:23:23 C 12 00 26.23 +14 26 48.1 V G96
2019-04-28 05:30:52 C 12 00 25.82 +14 26 51.1 V G96
2019-04-28 05:38:20 C 12 00 25.41 +14 26 54.2 V G96
2019-04-28 05:45:49 C 12 00 25.03 +14 26 56.7 V G96
2019-05-04 14:15:58 C 11 53 16.82 +15 15 36.3 q D29
2019-05-04 14:36:20 C 11 53 16.00 +15 15 40.9 q D29
2019-05-04 14:56:42 C 11 53 15.07 +15 15 46.5 q D29
2019-10-19 05:52:44 C 20 19 47.99 -36 32 08.4 V T08
2019-10-19 05:57:23 C 20 19 49.83 -36 32 06.0 V T08
2019-10-19 06:04:47 C 20 19 52.89 -36 32 02.4 V T08
2019-10-19 06:20:50 C 20 19 59.35 -36 31 54.7 V T08
2019-10-23 05:55:01 C 20 57 49.48 -35 27 16.6 V T08
2019-10-23 05:59:03 C 20 57 51.02 -35 27 13.4 V T08
2019-10-23 06:07:50 C 20 57 54.24 -35 27 05.5 V T08
2019-10-23 06:22:28 C 20 57 59.62 -35 26 52.4 V T08
2019-11-21 06:08:18 C 23 48 26.271 -19 31 04.22 U F51