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
2014-02-27 09:22:13 C 13 22 49.22 -00 21 26.5 q G96
2014-02-27 09:29:02 C 13 22 49.16 -00 21 24.9 q G96
2014-02-27 09:35:55 C 13 22 49.10 -00 21 21.9 q G96
2014-02-28 12:02:45 C 13 22 39.590 -00 11 19.96 L F51
2014-02-28 12:18:57 C 13 22 39.447 -00 11 13.66 L F51
2014-02-28 12:35:06 C 13 22 39.292 -00 11 07.56 L F51
2014-02-28 12:51:20 C 13 22 39.145 -00 11 01.25 L F51
2014-03-24 10:45:27 C 13 07 09.293 +05 03 00.82 L F51
2014-03-24 11:04:50 C 13 07 08.318 +05 03 14.22 L F51
2014-03-24 11:24:19 C 13 07 07.336 +05 03 27.64 L F51
2014-03-29 06:25:11 C 13 01 14.49 +06 24 40.9 R G45
2014-03-29 06:41:37 C 13 01 13.58 +06 24 52.9 R G45
2014-03-29 07:23:27 C 13 01 11.21 +06 25 22.6 R G45
2014-03-29 07:39:51 C 13 01 10.24 +06 25 34.8 R G45
2014-03-30 06:34:05 C 12 59 54.20 +06 42 08.4 R G45
2014-03-30 06:50:33 C 12 59 53.25 +06 42 20.3 R G45
2014-03-30 07:15:27 C 12 59 51.84 +06 42 39.7 R G45
2014-03-30 07:31:54 C 12 59 50.80 +06 42 50.9 R G45
2014-03-30 07:48:18 C 12 59 49.81 +06 43 03.0 R G45
2014-04-04 09:06:21 C 12 52 38.40 +08 11 50.4 q G96
2014-04-04 09:15:53 C 12 52 37.80 +08 11 56.9 q G96
2014-04-04 09:25:25 C 12 52 37.19 +08 12 04.5 q G96
2014-04-04 09:35:00 C 12 52 36.58 +08 12 11.3 q G96
2014-04-06 07:48:13 C 12 49 42.31 +08 46 03.4 q G96
2014-04-06 07:58:09 C 12 49 41.64 +08 46 10.2 q G96
2014-04-06 08:08:06 C 12 49 40.97 +08 46 17.3 q G96
2014-04-06 08:18:01 C 12 49 40.32 +08 46 24.5 q G96
2014-05-01 06:24:08 C 12 11 28.32 +14 45 46.8 q 703
2014-05-01 06:31:24 C 12 11 27.80 +14 45 48.3 q 703
2014-05-01 06:45:57 C 12 11 26.99 +14 45 52.6 q 703
2014-06-29 04:45:18 C 12 15 30.08 +12 03 49.9 q G96
2014-06-29 04:51:54 C 12 15 30.43 +12 03 46.4 q G96
2014-06-29 04:58:28 C 12 15 30.82 +12 03 43.0 q G96
2014-06-29 05:05:03 C 12 15 31.13 +12 03 39.8 q G96
2014-10-06 00:23:21 S 19 08 33.120 -42 57 24.84 L C51
2014-10-06 00:23:32 S 19 08 33.286 -42 57 25.96 L C51
2014-10-06 06:42:11 S 19 12 11.71 -43 02 38.4 L C51
2014-10-06 08:16:48 S 19 13 06.33 -43 03 52.4 L C51
2014-10-06 08:16:59 S 19 13 06.44 -43 03 53.3 L C51
2014-10-06 09:51:36 S 19 14 01.11 -43 05 05.2 L C51
2014-10-06 11:26:13 S 19 14 55.80 -43 06 16.2 L C51
2014-10-06 14:35:38 S 19 16 45.38 -43 08 33.0 L C51
2014-10-06 17:45:04 S 19 18 35.03 -43 10 43.1 L C51
2014-11-06 06:27:24 C 23 45 25.139 -25 43 10.68 L F51
2014-11-06 06:43:32 C 23 45 27.675 -25 42 43.49 L F51
2014-11-06 06:57:48 C 23 45 29.911 -25 42 19.35 L F51
2014-11-06 07:14:00 C 23 45 32.466 -25 41 51.77 L F51
2014-11-06 07:15:55 C 23 45 32.752 -25 41 48.60 L F51
2014-11-11 07:10:12 C 00 03 21.589 -22 28 03.97 L F51
2014-11-11 07:25:45 C 00 03 23.599 -22 27 39.92 L F51