331999 (2005 HA8)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2863577667 ± 2.88e-08
Semi-major axis (a)1.7403220662 AU ± 2.14e-09
Inclination (i)13.39692971° ± 3.14e-06
Long. of Asc. Node (Ω)102.11265939° ± 9.53e-06
Arg. of Perihelion (ω)173.49922753° ± 1.53e-05
Mean Anomaly (M)315.13085205° ± 1.30e-05
Mean Motion (n)0.4293068676°/day ± 7.94e-10
Perihelion dist (q)1.24196733 AU ± 5.01e-08
Aphelion dist (Q)2.23867681 AU ± 5.01e-08
Orbital Period2.29585492 yr ± 4.24e-09
Physical Parameters
H (abs. magnitude)19.29
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.236″
Uncertainty0
Orbit TypeAmor
MOID0.224846 AU
Observations Used248
Oppositions10
Arc Total2005-2023
First Observation Used2005-04-17
Last Observation Used2023-02-24
Observations (266)
Date Type RA Dec Mag Band Observatory
2005-06-24 05:30:45 C 16 25 01.62 -04 35 26.8 17.7 o 644
2005-06-24 22:37:58 C 16 24 58.34 -05 14 17.5 c 589
2005-06-24 22:41:05 C 16 24 58.38 -05 14 23.7 c 589
2005-06-24 22:42:38 C 16 24 58.29 -05 14 27.3 c 589
2005-06-24 22:44:12 C 16 24 58.24 -05 14 30.9 c 589
2005-06-24 22:45:45 C 16 24 58.23 -05 14 34.5 c 589
2005-06-28 05:13:31 C 16 25 06.57 -08 15 27.9 c 691
2005-06-28 05:35:59 C 16 25 06.51 -08 16 20.3 c 691
2005-06-28 05:58:22 C 16 25 06.42 -08 17 12.5 c 691
2005-07-01 05:21:08 C 16 25 43.30 -11 04 42.8 c 691
2005-07-01 05:43:23 C 16 25 43.42 -11 05 35.0 c 691
2005-07-01 06:05:50 C 16 25 43.48 -11 06 28.1 c 691
2005-07-04 05:24:31 C 16 26 51.41 -13 54 18.5 17.9 c 704
2005-07-04 05:39:34 C 16 26 51.57 -13 54 53.6 17.8 c 704
2005-07-04 05:54:20 C 16 26 51.67 -13 55 27.9 18.0 c 704
2005-07-04 06:09:07 C 16 26 51.88 -13 56 02.6 17.8 c 704
2005-07-04 06:23:56 C 16 26 52.06 -13 56 37.1 18.0 c 704
2005-07-04 06:48:55 C 16 26 52.44 -13 57 35.7 r 703
2005-07-04 07:07:35 C 16 26 52.65 -13 58 19.5 r 703
2005-07-04 07:16:57 C 16 26 52.76 -13 58 41.4 r 703
2005-07-05 06:22:48 C 16 27 22.63 -14 52 47.1 17.8 o 644
2005-07-05 06:57:17 C 16 27 23.14 -14 54 07.4 17.8 o 644
2005-07-05 07:49:31 C 16 27 23.93 -14 56 08.5 17.8 o 644
2005-07-05 21:52:21 C 16 27 44.41 -15 29 01.2 r A13
2005-07-05 21:59:11 C 16 27 44.53 -15 29 17.0 r A13
2005-07-05 22:55:09 C 16 27 45.53 -15 31 26.9 r A13
2005-07-14 10:47:58 C 16 35 08.16 -23 07 20.2 r 428
2005-07-14 11:30:46 C 16 35 09.90 -23 08 50.0 r 428
2005-07-15 12:01:52 C 16 36 23.03 -24 00 21.0 r 428
2005-07-15 12:17:21 C 16 36 23.67 -24 00 53.1 r 428
2005-07-15 12:20:25 C 16 36 23.84 -24 00 59.0 r 428
2005-07-15 12:23:48 C 16 36 24.02 -24 01 06.3 r 428
2005-09-22 12:35:15 C 19 50 23.42 -43 28 22.7 r 413
2005-09-22 12:42:44 C 19 50 24.42 -43 28 20.0 r 413
2007-01-17 07:44:24 C 10 07 52.73 +24 26 31.5 o 291
2007-01-17 07:51:15 C 10 07 52.48 +24 26 35.9 o 291
2007-01-17 07:57:14 C 10 07 52.29 +24 26 38.8 o 291
2007-02-23 05:05:24 C 09 21 41.04 +33 20 20.1 21.7 o H55
2009-01-02 02:54:55 C 06 39 50.42 +22 19 02.1 o 691
2009-01-02 03:21:04 C 06 39 48.66 +22 19 11.0 o 691
2012-04-23 11:40:14 C 20 15 28.58 -08 11 19.5 o 291
2012-04-23 11:42:25 C 20 15 28.89 -08 11 20.0 o 291
2012-04-23 11:44:36 C 20 15 29.20 -08 11 19.6 o 291
2012-06-20 10:07:49 C 23 30 25.81 -11 00 54.3 u 807
2012-06-20 10:15:09 C 23 30 26.69 -11 00 57.1 u 807
2012-06-20 10:35:22 C 23 30 29.12 -11 01 03.4 u 807
2012-08-16 18:07:50 C 01 13 48.21 -25 32 31.3 r E12
2012-08-16 18:18:06 C 01 13 48.21 -25 32 38.4 r E12
2012-08-16 18:28:24 C 01 13 48.18 -25 32 47.7 r E12
2012-08-16 18:38:44 C 01 13 48.28 -25 32 55.5 r E12