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
2010-03-06 03:05:59 C 03 56 18.75 +32 21 22.7 r H53
2010-03-07 20:47:20 C 03 57 24.11 +32 16 01.0 16.4 u C20
2010-03-07 20:49:26 C 03 57 24.17 +32 16 00.7 16.6 u C20
2010-03-09 19:44:25 C 03 58 45.45 +32 10 26.9 16.5 u C20
2010-03-09 20:37:14 C 03 58 47.08 +32 10 19.3 16.7 u 084
2010-03-09 20:40:24 C 03 58 47.18 +32 10 19.3 16.3 u 084
2010-03-12 19:42:45 C 04 01 05.44 +32 02 43.2 16.4 u 084
2010-03-12 19:45:55 C 04 01 05.51 +32 02 42.9 16.3 u 084
2010-03-16 18:46:32 C 04 04 37.79 +31 53 59.1 16.4 u 084
2010-03-16 18:49:42 C 04 04 37.85 +31 53 58.6 16.4 u 084
2010-03-23 18:02:13 C 04 12 03.81 +31 42 02.0 16.1 u C20
2010-03-23 18:04:20 C 04 12 03.91 +31 42 01.8 16.0 u C20
2010-03-23 19:27:03 C 04 12 08.02 +31 41 55.5 16.2 u 084
2010-03-23 19:30:13 C 04 12 08.19 +31 41 55.5 16.6 u 084
2010-03-24 17:03:46 C 04 13 12.23 +31 40 40.6 16.3 u C20
2010-03-24 17:05:53 C 04 13 12.35 +31 40 40.5 16.4 u C20
2010-03-24 20:04:28 C 04 13 21.36 +31 40 28.7 16.3 u 084
2010-03-24 20:07:38 C 04 13 21.49 +31 40 28.3 16.5 u 084
2010-03-26 18:37:25 C 04 15 44.98 +31 37 55.6 16.7 u C20
2010-03-26 18:39:31 C 04 15 45.09 +31 37 55.4 16.8 u C20
2010-03-27 16:58:39 C 04 16 56.39 +31 36 46.9 16.5 u C20
2010-03-27 17:00:46 C 04 16 56.50 +31 36 46.7 16.5 u C20
2010-03-28 16:55:52 C 04 18 14.56 +31 35 35.4 16.7 u C20
2010-03-28 16:57:59 C 04 18 14.68 +31 35 35.3 16.6 u C20
2010-03-30 19:02:50 C 04 21 03.76 +31 33 12.6 16.8 u 084
2010-04-01 18:58:44 C 04 23 52.59 +31 31 07.3 16.6 o 084
2010-04-01 19:01:53 C 04 23 52.79 +31 31 07.0 16.8 u 084
2010-04-06 03:16:45 C 04 30 23.65 +31 26 54.5 r 703
2010-04-06 03:22:09 C 04 30 23.94 +31 26 54.3 r 703
2010-04-06 03:27:34 C 04 30 24.33 +31 26 53.8 r 703
2010-04-06 03:33:00 C 04 30 24.66 +31 26 53.7 r 703
2010-04-06 03:38:30 C 04 30 25.02 +31 26 53.5 r 703
2010-04-12 20:09:47 C 04 41 30.84 +31 20 22.7 17.0 u 084
2010-04-13 19:29:53 C 04 43 13.98 +31 19 21.7 16.6 u 084
2010-04-14 20:01:44 C 04 45 04.21 +31 18 15.0 16.7 u 084
2010-04-15 19:35:18 C 04 46 51.67 +31 17 08.5 16.2 u 084
2010-04-15 19:38:28 C 04 46 51.90 +31 17 08.4 16.4 u 084
2010-04-16 18:54:25 C 04 48 39.63 +31 16 00.4 16.6 u C20
2010-04-16 18:56:32 C 04 48 39.80 +31 16 00.3 16.6 u C20
2010-04-18 19:19:40 C 04 52 29.14 +31 13 25.7 16.7 u 084
2010-04-19 18:06:09 C 04 54 19.41 +31 12 08.4 16.5 u C20
2010-04-19 18:08:16 C 04 54 19.58 +31 12 08.3 16.5 u C20
2010-04-20 18:10:41 C 04 56 17.67 +31 10 40.8 16.6 u C20
2010-04-21 20:02:16 C 04 58 26.76 +31 08 59.4 15.9 u 084
2010-04-24 19:48:59 C 05 04 34.84 +31 03 43.7 16.0 u 084
2010-04-26 19:39:11 C 05 08 48.45 +30 59 36.5 16.4 u 084
2010-04-28 18:11:55 C 05 13 01.47 +30 55 03.9 16.1 u C20
2010-04-28 18:14:02 C 05 13 01.67 +30 55 03.6 16.1 u C20
2010-04-29 18:15:46 C 05 15 14.74 +30 52 27.8 16.0 u C20
2010-04-29 18:17:53 C 05 15 14.94 +30 52 27.4 16.1 u C20