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
2009-12-16 23:06:26 C 05 26 03.64 +39 03 11.9 17.2 o C20
2009-12-17 21:16:40 C 05 23 56.56 +39 04 17.1 17.4 o C20
2009-12-17 21:18:48 C 05 23 56.35 +39 04 17.2 17.2 o C20
2009-12-19 19:29:13 C 05 19 28.77 +39 05 35.4 16.9 o 084
2009-12-19 19:32:28 C 05 19 28.48 +39 05 35.7 17.1 o 084
2010-01-01 17:33:50 C 04 49 15.06 +38 41 44.8 16.9 u 084
2010-01-04 04:57:41 C 04 43 42.79 +38 31 02.6 17.0 c 704
2010-01-04 05:15:58 C 04 43 41.09 +38 30 58.3 17.1 c 704
2010-01-04 05:34:15 C 04 43 39.36 +38 30 54.9 17.3 c 704
2010-01-04 05:52:43 C 04 43 37.64 +38 30 51.1 17.1 c 704
2010-01-04 06:11:03 C 04 43 35.93 +38 30 47.5 17.0 c 704
2010-01-06 00:34:33 C 04 39 44.98 +38 21 58.2 17.0 u C20
2010-01-06 00:36:40 C 04 39 44.79 +38 21 57.6 17.1 u C20
2010-01-07 19:22:51 C 04 35 58.59 +38 12 20.8 17.2 u C20
2010-01-07 19:24:58 C 04 35 58.40 +38 12 20.3 17.1 u C20
2010-01-08 19:47:21 C 04 33 52.40 +38 06 27.9 17.0 u 084
2010-01-08 19:50:38 C 04 33 52.15 +38 06 27.4 17.1 u 084
2010-01-09 00:24:18 C 04 33 28.53 +38 05 19.3 17.2 u C20
2010-01-09 00:26:25 C 04 33 28.35 +38 05 18.8 17.1 u C20
2010-01-09 01:35:27 C 04 33 22.58 +38 05 00.8 17.0 u 084
2010-01-09 01:38:42 C 04 33 22.35 +38 05 00.2 17.0 u 084
2010-01-09 19:04:01 C 04 31 54.29 +38 00 42.1 17.3 u C20
2010-01-09 19:06:08 C 04 31 54.11 +38 00 41.6 17.3 u C20
2010-01-10 00:26:03 C 04 31 27.10 +37 59 17.7 17.4 u C20
2010-01-10 00:28:11 C 04 31 26.92 +37 59 17.1 17.4 u C20
2010-01-10 19:33:43 C 04 29 52.42 +37 54 23.6 17.3 u C20
2010-01-10 19:35:50 C 04 29 52.27 +37 54 23.0 17.3 u C20
2010-01-12 05:43:08 C 04 27 06.98 +37 45 16.8 r 703
2010-01-12 05:54:04 C 04 27 06.04 +37 45 13.7 r 703
2010-01-12 06:15:56 C 04 27 04.28 +37 45 07.5 r 703
2010-01-12 08:00:12 C 04 26 55.89 +37 44 38.2 r 703
2010-01-12 08:12:47 C 04 26 54.88 +37 44 35.0 r 703
2010-01-12 08:38:02 C 04 26 52.83 +37 44 27.8 r 703
2010-01-15 23:56:50 C 04 20 16.42 +37 19 31.6 c A24
2010-01-15 23:58:18 C 04 20 16.32 +37 19 31.2 c A24
2010-01-18 16:52:25 C 04 15 47.17 +36 59 55.4 17.1 u 084
2010-01-18 16:55:40 C 04 15 46.95 +36 59 54.4 17.1 u 084
2010-01-18 20:38:30 C 04 15 31.87 +36 58 47.0 17.3 u C20
2010-01-18 20:40:37 C 04 15 31.73 +36 58 46.4 17.3 u C20
2010-01-20 16:48:57 C 04 12 42.60 +36 45 03.9 17.0 u 084
2010-01-20 16:52:12 C 04 12 42.38 +36 45 03.1 16.9 u 084
2010-01-23 21:30:36 C 04 08 13.31 +36 20 54.1 17.0 u C20
2010-02-01 19:28:33 C 03 58 37.51 +35 13 59.9 17.0 u C20
2010-02-01 19:30:40 C 03 58 37.42 +35 13 59.1 17.0 u C20
2010-02-02 19:50:52 C 03 57 48.01 +35 06 38.2 16.9 u C20
2010-02-06 19:05:00 C 03 55 05.51 +34 38 46.7 16.8 u C20
2010-02-06 22:41:13 C 03 55 00.24 +34 37 43.3 17.1 u C20
2010-02-07 20:29:53 C 03 54 30.28 +34 31 35.8 17.0 u C20
2010-02-10 20:55:02 C 03 53 08.47 +34 11 53.3 17.3 u C20
2010-02-10 20:57:09 C 03 53 08.43 +34 11 52.6 17.0 u C20