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
2011-01-30 02:41:02 C 01 00 18.76 +07 49 29.2 19.4 c 704
2011-01-30 02:59:31 C 01 00 19.45 +07 49 35.5 20.1 c 704
2011-01-30 03:18:02 C 01 00 20.07 +07 49 39.6 19.3 c 704
2011-09-23 11:22:13 C 04 03 38.91 +26 04 42.3 r 703
2011-09-23 11:33:31 C 04 03 38.73 +26 04 41.9 r 703
2011-09-23 11:44:52 C 04 03 38.52 +26 04 43.7 r 703
2011-09-23 11:56:23 C 04 03 38.34 +26 04 43.7 r 703
2011-10-19 09:02:56 C 03 46 19.29 +26 07 38.2 o 691
2011-10-19 09:33:38 C 03 46 18.09 +26 07 36.9 o 691
2011-10-19 09:59:19 C 03 46 17.06 +26 07 35.7 o 691
2011-10-19 11:42:04 C 03 46 13.04 +26 07 31.4 r 703
2011-10-19 11:49:25 C 03 46 12.72 +26 07 30.2 r 703
2011-10-19 11:56:54 C 03 46 12.39 +26 07 30.0 r 703
2011-10-19 12:04:13 C 03 46 12.10 +26 07 31.0 r 703
2011-10-22 09:12:18 C 03 43 26.47 +26 04 12.0 18.9 c 704
2011-10-22 09:29:30 C 03 43 25.74 +26 04 10.9 19.3 c 704
2011-10-22 09:46:33 C 03 43 25.06 +26 04 09.8 19.3 c 704
2011-10-22 10:03:38 C 03 43 24.34 +26 04 08.8 19.8 c 704
2011-10-22 10:20:47 C 03 43 23.61 +26 04 07.6 19.2 c 704
2011-10-22 23:21:18 C 03 42 51.48 +26 03 24.4 r 114
2011-10-22 23:26:56 C 03 42 51.27 +26 03 24.1 r 114
2011-10-22 23:32:34 C 03 42 51.04 +26 03 23.7 r 114
2011-10-22 23:38:13 C 03 42 50.78 +26 03 23.3 r 114
2011-10-23 08:21:10 C 03 42 29.14 +26 02 54.6 19.4 c 704
2011-10-23 08:39:34 C 03 42 28.29 +26 02 53.2 19.9 c 704
2011-10-23 08:56:46 C 03 42 27.62 +26 02 52.1 19.9 c 704
2011-10-24 13:04:05 C 03 41 16.780 +26 01 10.96 L F51
2011-10-24 13:26:02 C 03 41 15.833 +26 01 09.55 L F51
2011-10-24 14:09:49 C 03 41 13.944 +26 01 06.68 L F51
2011-10-27 07:02:55 C 03 38 25.97 +25 56 38.6 o 691
2011-10-27 07:28:31 C 03 38 24.80 +25 56 36.9 o 691
2011-10-27 07:54:07 C 03 38 23.69 +25 56 35.1 o 691
2011-10-28 07:28:42 C 03 37 21.19 +25 54 46.0 19.1 c 704
2011-10-28 07:33:00 C 03 37 20.92 +25 54 45.6 r 703
2011-10-28 07:45:16 C 03 37 20.35 +25 54 44.7 r 703
2011-10-28 07:46:01 C 03 37 20.36 +25 54 44.9 19.2 c 704
2011-10-28 07:57:42 C 03 37 19.88 +25 54 43.5 r 703
2011-10-28 08:03:23 C 03 37 19.60 +25 54 44.1 19.3 c 704
2011-10-28 08:10:12 C 03 37 19.27 +25 54 43.4 r 703
2011-10-28 08:20:47 C 03 37 18.78 +25 54 42.2 19.8 c 704
2011-10-28 08:38:09 C 03 37 18.03 +25 54 41.1 19.5 c 704
2011-11-02 07:40:41 C 03 31 51.92 +25 44 05.2 19.4 c 704
2011-11-02 07:58:28 C 03 31 51.14 +25 44 01.6 19.7 c 704
2011-11-02 08:34:02 C 03 31 49.41 +25 43 59.6 19.5 c 704
2011-11-02 08:51:59 C 03 31 48.67 +25 43 56.3 20.2 c 704
2011-11-15 07:46:43 C 03 16 52.760 +25 05 17.69 L F51
2011-11-15 08:04:29 C 03 16 51.885 +25 05 15.13 L F51
2011-11-15 08:51:25 C 03 16 49.33 +25 05 07.8 r 703
2011-11-15 08:59:15 C 03 16 49.08 +25 05 06.7 r 703
2011-11-15 09:07:10 C 03 16 48.57 +25 05 06.1 r 703