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
2012-12-11 03:06:39 C 04 44 11.07 +35 08 00.4 c A24
2012-12-11 03:07:41 C 04 44 10.99 +35 08 00.3 c A24
2012-12-11 06:02:51 C 04 43 58.49 +35 07 49.4 18.0 c 704
2012-12-11 06:22:21 C 04 43 57.06 +35 07 48.1 18.1 c 704
2012-12-11 06:40:55 C 04 43 55.65 +35 07 46.7 18.1 c 704
2012-12-11 07:00:05 C 04 43 54.24 +35 07 45.2 18.1 c 704
2012-12-11 07:18:53 C 04 43 52.87 +35 07 44.0 18.1 c 704
2012-12-12 00:28:40 C 04 42 37.80 +35 06 24.0 c A24
2012-12-12 00:29:43 C 04 42 37.70 +35 06 23.9 c A24
2012-12-12 00:30:45 C 04 42 37.63 +35 06 23.8 c A24
2012-12-12 00:31:47 C 04 42 37.56 +35 06 23.6 c A24
2012-12-12 01:35:55 C 04 42 32.83 +35 06 18.2 c A24
2012-12-12 01:36:57 C 04 42 32.73 +35 06 18.2 c A24
2012-12-12 01:37:59 C 04 42 32.68 +35 06 18.2 c A24
2012-12-12 01:39:01 C 04 42 32.62 +35 06 17.9 c A24
2012-12-12 21:46:40 C 04 41 04.78 +35 04 37.7 o 461
2012-12-12 21:56:06 C 04 41 04.09 +35 04 36.9 o 461
2012-12-12 22:05:31 C 04 41 03.37 +35 04 35.9 o 461
2012-12-31 09:31:20 C 04 10 43.045 +33 56 33.43 L F51
2012-12-31 09:49:33 C 04 10 41.920 +33 56 29.60 L F51
2013-01-01 06:15:33 C 04 09 28.528 +33 52 15.07 L F51
2013-01-01 06:33:05 C 04 09 27.461 +33 52 11.47 L F51
2013-01-01 06:53:21 C 04 09 26.227 +33 52 07.28 L F51
2013-01-01 07:10:24 C 04 09 25.189 +33 52 03.76 L F51
2013-01-10 04:43:49 C 03 57 56.32 +33 04 52.5 17.9 c 704
2013-01-10 05:02:24 C 03 57 55.42 +33 04 47.7 18.0 c 704
2013-01-10 05:20:47 C 03 57 54.50 +33 04 43.4 18.0 c 704
2013-01-10 05:39:14 C 03 57 53.64 +33 04 39.4 18.0 c 704
2013-01-10 05:57:33 C 03 57 52.74 +33 04 35.0 18.1 c 704
2013-01-27 01:05:14 C 03 43 54.52 +31 35 58.3 u H21
2013-01-27 01:14:58 C 03 43 54.31 +31 35 56.5 u H21
2013-01-27 01:24:42 C 03 43 54.07 +31 35 54.6 u H21
2013-01-27 01:34:08 C 03 43 53.87 +31 35 52.5 u H21
2013-02-08 18:36:06 C 03 40 07.95 +30 42 20.6 c A24
2013-02-08 18:38:11 C 03 40 07.96 +30 42 20.2 c A24
2013-02-08 18:59:50 C 03 40 07.85 +30 42 17.0 c A24
2013-02-08 19:24:48 C 03 40 07.76 +30 42 13.1 c A24
2013-02-08 19:45:46 C 03 40 07.66 +30 42 10.2 c A24
2013-02-08 19:47:51 C 03 40 07.66 +30 42 09.8 c A24
2013-02-09 18:59:00 C 03 40 04.15 +30 38 47.1 c A24
2013-02-09 19:01:05 C 03 40 04.13 +30 38 46.5 c A24
2013-02-09 19:19:41 C 03 40 04.12 +30 38 43.7 c A24
2013-02-09 19:40:31 C 03 40 04.04 +30 38 40.7 c A24
2013-02-09 19:59:28 C 03 40 04.01 +30 38 37.9 c A24
2013-02-09 20:01:33 C 03 40 03.98 +30 38 37.8 c A24
2013-03-15 03:15:40 C 03 54 27.61 +29 42 21.2 u 703
2013-03-15 03:22:35 C 03 54 27.86 +29 42 20.9 u 703
2013-03-15 03:29:38 C 03 54 28.11 +29 42 20.8 u 703
2013-03-15 03:36:41 C 03 54 28.33 +29 42 20.5 u 703
2013-03-15 03:43:42 C 03 54 28.58 +29 42 20.4 u 703