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
2001-12-19 01:56:37 C 02 01 59.01 +17 16 41.8 19.3 c 704
2001-12-19 02:18:29 C 02 01 58.54 +17 16 39.3 19.0 c 704
2001-12-19 02:40:31 C 02 01 58.12 +17 16 36.2 19.0 c 704
2001-12-19 03:02:24 C 02 01 57.68 +17 16 34.1 19.1 c 704
2002-10-04 09:44:54 C 04 51 34.54 +30 07 56.8 19.5 c 704
2002-10-04 10:07:17 C 04 51 34.19 +30 07 56.9 19.9 c 704
2002-10-04 10:29:47 C 04 51 33.79 +30 08 01.0 19.4 c 704
2002-10-04 11:15:06 C 04 51 33.23 +30 08 03.7 19.9 c 704
2002-10-10 08:27:39 C 04 49 10.82 +30 19 56.3 19.6 c 704
2002-10-10 08:50:15 C 04 49 10.39 +30 19 58.9 19.2 c 704
2002-10-10 09:12:50 C 04 49 09.93 +30 20 00.2 19.6 c 704
2002-10-10 09:35:34 C 04 49 09.46 +30 20 01.8 19.8 c 704
2002-10-12 08:35:47 C 04 48 10.61 +30 23 40.9 19.7 c 704
2002-10-12 08:59:57 C 04 48 09.98 +30 23 42.7 19.3 c 704
2002-10-12 09:24:09 C 04 48 09.47 +30 23 44.1 19.7 c 704
2002-10-12 09:48:20 C 04 48 08.92 +30 23 47.2 19.5 c 704
2002-10-12 09:56:36 C 04 48 08.85 +30 23 47.4 19.3 c 704
2002-10-12 10:19:56 C 04 48 08.29 +30 23 49.5 19.7 c 704
2002-10-12 10:42:19 C 04 48 07.66 +30 23 50.1 19.8 c 704
2002-10-12 10:43:24 C 04 48 07.69 +30 23 51.6 19.9 c 704
2002-10-12 11:05:51 C 04 48 07.17 +30 23 52.5 20.1 c 704
2002-10-12 11:06:52 C 04 48 07.19 +30 23 52.7 19.6 c 704
2002-10-12 11:29:26 C 04 48 06.68 +30 23 53.6 19.7 c 704
2002-10-12 11:30:27 C 04 48 06.67 +30 23 54.7 19.4 c 704
2002-11-04 09:59:43 C 04 29 42.73 +30 48 10.4 c 670
2002-11-04 11:33:02 C 04 29 38.65 +30 48 11.2 c 670
2002-11-11 07:50:14 C 04 21 58.87 +30 46 09.3 c 670
2002-11-11 10:53:32 C 04 21 49.62 +30 46 02.7 c 670
2002-11-15 06:52:00 C 04 17 13.37 +30 42 32.8 19.2 c 704
2002-11-15 07:16:46 C 04 17 12.04 +30 42 32.0 18.8 c 704
2002-11-15 07:41:13 C 04 17 10.79 +30 42 30.9 19.1 c 704
2002-11-23 20:17:12 C 04 06 24.83 +30 28 22.0 c 113
2002-11-23 20:24:59 C 04 06 24.41 +30 28 21.5 c 113
2002-11-25 06:05:23 C 04 04 35.62 +30 25 13.6 c 670
2002-11-25 08:14:21 C 04 04 28.57 +30 25 01.0 c 670
2002-12-05 05:20:12 C 03 51 46.05 +29 56 42.9 18.3 c 704
2002-12-05 05:42:30 C 03 51 44.88 +29 56 40.1 18.7 c 704
2002-12-05 06:04:48 C 03 51 43.65 +29 56 36.8 19.0 c 704
2002-12-05 06:27:09 C 03 51 42.47 +29 56 33.4 18.8 c 704
2002-12-05 06:49:14 C 03 51 41.34 +29 56 30.3 18.9 c 704
2002-12-09 05:09:38 C 03 46 48.00 +29 42 38.6 c 699
2002-12-09 05:32:55 C 03 46 46.85 +29 42 35.4 c 699
2002-12-09 05:56:13 C 03 46 45.83 +29 42 32.0 c 699
2002-12-09 06:19:30 C 03 46 44.44 +29 42 27.3 c 699
2002-12-11 07:54:22 C 03 44 14.30 +29 34 42.6 o 644
2002-12-11 08:24:49 C 03 44 12.78 +29 34 37.4 o 644
2002-12-11 08:55:01 C 03 44 11.22 +29 34 33.3 o 644
2002-12-14 05:34:48 C 03 40 49.53 +29 23 22.2 19.3 c 704
2002-12-14 05:55:52 C 03 40 48.48 +29 23 20.7 19.2 c 704
2002-12-14 06:17:16 C 03 40 47.51 +29 23 16.6 18.9 c 704