4341 Poseidon (1987 KF)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.6801107602 ± 1.58e-08
Semi-major axis (a)1.8342474389 AU ± 1.45e-09
Inclination (i)11.84040545° ± 2.06e-06
Long. of Asc. Node (Ω)108.02422834° ± 1.23e-05
Arg. of Perihelion (ω)15.83332878° ± 1.29e-05
Mean Anomaly (M)202.70165030° ± 3.72e-06
Mean Motion (n)0.3967577275°/day ± 4.69e-10
Perihelion dist (q)0.58675602 AU ± 2.90e-08
Aphelion dist (Q)3.08173886 AU ± 2.91e-08
Orbital Period2.48420186 yr ± 2.94e-09
Physical Parameters
H (abs. magnitude)16.07
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.309″
Uncertainty0
Orbit TypeApollo
MOID0.194489 AU
Observations Used802
Gaia Obs Used38
Oppositions18
Arc Total1987-2025
First Observation Used1987-05-29
Last Observation Used2025-07-31
Observations (842)
Date Type RA Dec Mag Band Observatory
1997-05-09 23:42:11 C 17 30 38.99 +07 03 39.5 z 557
1997-05-10 00:22:27 C 17 30 32.18 +07 03 07.4 z 557
1997-05-10 00:46:42 C 17 30 28.01 +07 02 48.2 z 118
1997-05-10 00:53:03 C 17 30 26.95 +07 02 43.2 z 118
1997-05-10 01:00:47 C 17 30 25.63 +07 02 37.0 z 118
1997-05-10 01:30:44 C 17 30 20.62 +07 02 12.8 z 557
1997-05-10 20:55:02 C 17 27 09.80 +06 46 37.3 z 557
1997-05-10 22:22:04 C 17 26 55.36 +06 45 27.6 z 557
1997-05-10 23:46:48 C 17 26 41.23 +06 44 19.5 z 557
1997-05-11 01:40:09 C 17 26 22.27 +06 42 48.1 z 557
1997-05-14 08:56:27 C 17 13 43.60 +05 37 55.1 i 711
1997-05-14 09:00:53 C 17 13 42.89 +05 37 51.3 i 711
1997-05-14 21:53:00 C 17 11 44.13 +05 27 04.3 z 557
1997-05-14 23:01:26 C 17 11 33.39 +05 26 07.8 z 557
1997-05-14 23:33:31 C 17 11 28.35 +05 25 41.0 z 557
1997-05-15 00:30:02 C 17 11 19.46 +05 24 54.1 z 557
1997-05-15 01:03:38 C 17 11 14.16 +05 24 26.2 z 557
1997-05-15 10:13:20 C 17 09 49.67 +05 16 53.0 i 711
1997-05-15 10:18:48 C 17 09 48.81 +05 16 48.5 i 711
1997-05-16 20:51:37 C 17 04 38.09 +04 47 49.4 z 557
1997-05-16 21:19:26 C 17 04 33.64 +04 47 26.0 z 121
1997-05-16 21:33:45 C 17 04 31.44 +04 47 13.8 z 121
1997-05-16 22:02:13 C 17 04 27.43 +04 46 50.2 z 557
1997-05-16 22:47:59 C 17 04 20.22 +04 46 12.5 z 121
1997-05-16 22:55:18 C 17 04 19.09 +04 46 05.9 z 121
1997-05-16 23:09:35 C 17 04 16.95 +04 45 54.2 z 121
1997-05-16 23:21:58 C 17 04 15.36 +04 45 43.5 z 557
1997-05-17 00:32:59 C 17 04 04.61 +04 44 43.9 z 557
1997-05-17 01:31:26 C 17 03 55.76 +04 43 54.9 z 557
1997-05-17 21:28:08 C 17 01 01.18 +04 27 09.9 557
1997-05-17 23:07:16 C 17 00 46.50 +04 25 46.7 557
1997-05-18 00:10:58 C 17 00 37.04 +04 24 53.2 557
1997-05-18 01:27:33 C 17 00 25.68 +04 23 48.8 557
1997-05-18 14:51:08 C 16 58 30.60 +04 12 36.3 z 381
1997-05-18 14:53:06 C 16 58 30.32 +04 12 34.6 z 381
1997-05-20 09:55:07 C 16 52 28.58 +03 36 27.8 c 608
1997-05-20 10:28:18 C 16 52 23.88 +03 36 00.0 c 608
1997-05-21 10:28:54 C 16 49 08.63 +03 15 50.3 c 608
1997-05-21 11:07:09 C 16 49 03.30 +03 15 18.6 c 608
1997-05-27 15:23:15 C 16 30 47.98 +01 12 30.7 360
1997-05-27 15:28:15 C 16 30 47.39 +01 12 26.7 360
1997-05-28 22:30:05 C 16 27 23.02 +00 47 21.1 z 610
1997-05-28 22:41:07 C 16 27 21.81 +00 47 12.7 z 610
1997-05-28 22:53:22 C 16 27 20.47 +00 47 03.4 z 610
1997-06-01 20:06:36 C 16 17 56.60 -00 26 38.1 z 121
1997-06-01 21:24:44 C 16 17 49.08 -00 27 38.5 z 121
1997-06-01 21:29:45 C 16 17 48.59 -00 27 42.5 z 121
1997-06-10 23:21:15 C 16 00 44.35 -03 07 56.0 z 046
1997-06-10 23:24:08 C 16 00 44.16 -03 07 58.0 z 046
1997-06-10 23:28:32 C 16 00 43.87 -03 08 01.0 z 046