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
2005-04-17 09:43:52 C 16 31 06.45 +14 00 02.0 r 703
2005-04-17 09:55:32 C 16 31 06.75 +14 00 07.2 r 703
2005-04-17 10:07:07 C 16 31 07.15 +14 00 12.3 r 703
2005-04-17 10:18:35 C 16 31 07.47 +14 00 16.7 r 703
2005-05-03 10:09:40 C 16 40 32.48 +15 54 46.2 o 695
2005-05-03 10:37:37 C 16 40 32.66 +15 54 50.2 o 695
2005-05-06 21:29:18 C 16 41 18.77 +16 03 17.1 c A50
2005-05-06 21:51:02 C 16 41 18.85 +16 03 18.0 c A50
2005-05-07 01:35:21 C 16 41 19.83 +16 03 35.0 o 493
2005-05-07 02:45:41 C 16 41 19.88 +16 03 38.4 o 493
2005-05-07 23:32:58 C 16 41 27.21 +16 04 16.5 r J95
2005-05-08 01:18:58 C 16 41 27.25 +16 04 20.0 r J95
2005-05-08 06:45:39 C 16 41 29.36 +16 04 30.9 c 673
2005-05-08 06:48:40 C 16 41 29.35 +16 04 31.0 c 673
2005-05-08 07:22:42 C 16 41 29.17 +16 04 32.5 m 333
2005-05-08 07:34:24 C 16 41 29.16 +16 04 32.6 m 333
2005-05-08 07:46:23 C 16 41 29.12 +16 04 33.3 m 333
2005-05-08 07:58:19 C 16 41 28.56 +16 04 32.7 r 850
2005-05-08 07:58:21 C 16 41 29.12 +16 04 33.7 m 333
2005-05-08 08:14:40 C 16 41 29.26 +16 04 33.0 c 673
2005-05-08 08:19:14 C 16 41 28.55 +16 04 32.5 r 850
2005-05-08 08:21:59 C 16 41 29.26 +16 04 33.1 c 673
2005-05-08 08:40:10 C 16 41 28.51 +16 04 32.7 r 850
2005-05-08 09:01:05 C 16 41 28.48 +16 04 32.6 r 850
2005-05-08 09:22:01 C 16 41 28.46 +16 04 33.0 r 850
2005-05-08 09:36:38 C 16 41 28.85 +16 04 34.5 r 448
2005-05-08 09:51:14 C 16 41 28.79 +16 04 34.4 r 448
2005-05-08 10:05:19 C 16 41 28.80 +16 04 34.4 r 448
2005-05-09 00:20:41 C 16 41 32.45 +16 04 27.2 r J95
2005-05-09 01:43:34 C 16 41 32.32 +16 04 26.7 r J95
2005-05-09 06:12:05 C 16 41 33.87 +16 04 27.5 c G98
2005-05-09 08:07:07 C 16 41 33.57 +16 04 26.3 c G98
2005-05-09 08:36:40 C 16 41 33.67 +16 04 26.1 c 673
2005-05-09 08:59:57 C 16 41 33.37 +16 04 25.3 c G98
2005-05-09 09:15:50 C 16 41 33.54 +16 04 25.5 c 673
2005-05-09 09:53:58 C 16 41 33.19 +16 04 24.1 c G98
2005-05-18 10:34:31 C 16 40 35.37 +15 23 29.7 o F65
2005-05-18 10:35:51 C 16 40 35.36 +15 23 29.1 o F65
2005-05-18 10:37:11 C 16 40 35.33 +15 23 28.6 o F65
2005-05-26 23:55:15 C 16 37 24.08 +13 24 22.2 r 941
2005-05-26 23:56:26 C 16 37 24.05 +13 24 21.1 r 941
2005-05-26 23:57:37 C 16 37 24.02 +13 24 20.2 r 941
2005-05-26 23:58:48 C 16 37 23.99 +13 24 19.1 r 941
2005-05-26 23:59:59 C 16 37 23.96 +13 24 18.2 r 941
2005-05-28 00:35:47 C 16 36 54.03 +13 03 56.6 r 170
2005-05-28 00:36:59 C 16 36 54.01 +13 03 55.4 r 170
2005-05-28 00:40:02 C 16 36 53.97 +13 03 52.9 r 170
2005-06-02 06:34:09 C 16 34 07.95 +10 57 21.9 18.3 c 704
2005-06-02 06:49:10 C 16 34 07.48 +10 57 03.5 18.6 c 704
2005-06-02 07:04:10 C 16 34 07.06 +10 56 46.5 18.5 c 704