2212 Hephaistos (1978 SB)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.8346603000
Semi-major axis (a)2.1675877000 AU
Inclination (i)11.20255000°
Long. of Asc. Node (Ω)26.56556000°
Arg. of Perihelion (ω)210.46301000°
Mean Anomaly (M)308.24302000°
Mean Motion (n)0.3088439100°/day
Perihelion dist (q)0.35838830 AU
Aphelion dist (Q)3.97678710 AU
Orbital Period3.19128080 yr
Physical Parameters
H (abs. magnitude)13.45
G (slope)0.15
Orbit Solution
SourceMPC
Solution Date
RMS Residual0.730″
Uncertainty0
Orbit TypeApollo
MOID0.111922 AU
Observations Used4548
Oppositions39
Arc Total1978-2026
First Observation Used
Last Observation Used2026-03-22
Observations (4672)
Date Type RA Dec Mag Band Observatory
2004-12-15 03:47:38 C 01 41 02.28 +14 15 43.5 19.6 c 704
2004-12-15 04:06:20 C 01 41 01.96 +14 15 41.3 19.7 c 704
2005-10-07 14:47:46 C 04 30 32.47 +29 00 41.7 568
2005-10-07 15:05:34 C 04 30 32.08 +29 00 42.6 568
2005-10-07 15:24:30 C 04 30 31.64 +29 00 43.8 568
2005-10-23 10:27:27 C 04 19 27.61 +29 13 38.1 o 644
2005-10-23 12:05:24 C 04 19 23.96 +29 13 38.8 o 644
2005-10-23 12:35:17 C 04 19 22.85 +29 13 39.1 o 644
2005-10-30 07:41:50 C 04 12 58.75 +29 12 56.2 19.0 c 704
2005-10-30 07:59:12 C 04 12 57.97 +29 12 55.9 19.4 c 704
2005-10-30 08:16:24 C 04 12 57.25 +29 12 55.6 19.2 c 704
2005-10-30 08:33:53 C 04 12 56.51 +29 12 55.0 19.2 c 704
2005-10-30 08:51:06 C 04 12 55.79 +29 12 54.7 19.4 c 704
2005-11-02 07:45:29 C 04 09 52.94 +29 11 12.0 19.0 c 704
2005-11-02 08:02:49 C 04 09 52.20 +29 11 10.9 19.0 c 704
2005-11-02 08:20:07 C 04 09 51.36 +29 11 10.6 19.0 c 704
2005-11-02 08:37:34 C 04 09 50.63 +29 11 10.9 19.3 c 704
2005-11-02 08:55:02 C 04 09 49.87 +29 11 08.6 19.1 c 704
2005-11-21 03:34:23 C 03 48 02.47 +28 38 25.2 o 699
2005-11-21 04:07:17 C 03 48 00.59 +28 38 20.3 o 699
2005-11-21 04:40:11 C 03 47 59.12 +28 38 17.4 o 699
2005-11-21 05:13:06 C 03 47 57.34 +28 38 14.1 o 699
2005-11-21 06:52:46 C 03 47 52.15 +28 38 02.7 r 703
2005-11-21 07:02:08 C 03 47 51.68 +28 38 03.3 r 703
2005-11-21 07:11:32 C 03 47 51.28 +28 38 00.0 r 703
2005-11-21 07:20:56 C 03 47 50.85 +28 38 00.2 r 703
2005-11-28 05:14:05 C 03 39 28.41 +28 16 53.1 o 699
2005-11-28 05:42:54 C 03 39 26.91 +28 16 50.1 18.9 c 704
2005-11-28 05:47:01 C 03 39 26.72 +28 16 49.3 o 699
2005-11-28 06:02:35 C 03 39 25.90 +28 16 46.8 18.9 c 704
2005-11-28 06:19:57 C 03 39 25.00 +28 16 43.8 o 699
2005-11-28 06:21:57 C 03 39 24.93 +28 16 43.8 19.0 c 704
2005-11-28 06:41:36 C 03 39 23.88 +28 16 41.5 19.3 c 704
2005-11-28 06:52:54 C 03 39 23.42 +28 16 38.4 o 699
2005-11-28 07:01:25 C 03 39 22.92 +28 16 38.7 19.3 c 704
2005-12-01 07:49:33 C 03 35 46.55 +28 06 07.2 o 644
2005-12-01 08:26:40 C 03 35 44.70 +28 06 01.9 o 644
2005-12-01 09:06:08 C 03 35 42.73 +28 05 55.8 o 644
2005-12-05 04:47:37 C 03 31 17.39 +27 51 48.4 19.4 c 704
2005-12-05 05:06:03 C 03 31 16.52 +27 51 45.8 19.4 c 704
2005-12-05 05:24:25 C 03 31 15.64 +27 51 42.8 19.3 c 704
2005-12-05 05:43:00 C 03 31 14.83 +27 51 38.7 19.5 c 704
2005-12-08 03:56:20 C 03 27 58.21 +27 40 17.6 r 703
2005-12-08 04:06:42 C 03 27 57.88 +27 40 16.4 r 703
2005-12-08 04:17:06 C 03 27 57.45 +27 40 15.1 r 703
2005-12-08 04:27:31 C 03 27 56.91 +27 40 13.8 r 703
2005-12-24 05:32:47 C 03 12 29.34 +26 34 45.0 r 703
2005-12-24 05:44:17 C 03 12 28.94 +26 34 42.8 r 703
2005-12-24 05:55:46 C 03 12 28.51 +26 34 40.8 r 703
2005-12-24 06:07:16 C 03 12 28.15 +26 34 38.9 r 703