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
2013-10-05 22:38:14 C 19 11 36.27 -42 41 08.6 r Y00
2013-10-05 22:39:12 C 19 11 36.97 -42 41 06.1 r Y00
2013-10-05 22:40:10 C 19 11 37.66 -42 41 03.4 r Y00
2013-10-07 11:45:40 C 19 36 27.83 -40 53 20.6 u E10
2013-10-07 11:53:01 C 19 36 32.37 -40 52 58.0 u E10
2013-10-07 11:56:16 C 19 36 34.35 -40 52 48.1 u E10
2013-10-20 00:53:05 C 21 27 25.15 -26 56 49.1 r Y00
2013-10-20 00:54:46 C 21 27 25.48 -26 56 45.4 r Y00
2013-10-20 00:56:28 C 21 27 25.83 -26 56 41.8 r Y00
2013-10-21 00:47:47 C 21 32 16.68 -26 06 06.1 r Y00
2013-10-21 00:50:22 C 21 32 17.17 -26 06 00.5 r Y00
2013-10-21 00:52:54 C 21 32 17.67 -26 05 56.0 r Y00
2013-10-24 01:53:35 C 21 45 22.01 -23 44 53.4 o 926
2013-10-24 02:14:25 C 21 45 25.32 -23 44 16.0 o 926
2013-10-24 02:40:14 C 21 45 29.42 -23 43 29.6 o 926
2013-10-26 03:35:10 C 21 53 00.97 -22 19 14.6 q 703
2013-10-26 03:43:56 C 21 53 02.22 -22 19 00.2 q 703
2013-10-26 03:52:39 C 21 53 03.47 -22 18 45.8 q 703
2013-10-26 04:01:24 C 21 53 04.70 -22 18 31.2 q 703
2013-10-27 23:59:24 C 21 59 12.10 -21 08 55.4 u H21
2013-10-28 00:02:48 C 21 59 12.54 -21 08 50.3 u H21
2013-10-28 00:06:13 C 21 59 12.98 -21 08 45.2 u H21
2013-10-28 00:09:17 C 21 59 13.38 -21 08 40.3 u H21
2013-10-28 00:15:43 C 21 59 14.22 -21 08 30.7 u H21
2013-10-28 00:19:26 C 21 59 14.70 -21 08 25.1 u H21
2013-11-01 02:52:42 C 22 11 13.39 -18 50 02.8 q 703
2013-11-01 03:03:03 C 22 11 14.52 -18 49 49.2 q 703
2013-11-01 03:13:23 C 22 11 15.65 -18 49 35.8 q 703
2013-11-01 03:23:44 C 22 11 16.75 -18 49 22.5 q 703
2013-11-09 01:48:38 C 22 29 55.07 -15 13 51.4 q 703
2013-11-09 01:55:09 C 22 29 55.64 -15 13 45.4 q 703
2013-11-09 02:01:40 C 22 29 56.18 -15 13 38.6 q 703
2013-11-09 02:08:11 C 22 29 56.75 -15 13 32.2 q 703
2013-11-13 10:01:56 C 22 38 31.45 -13 36 24.6 o 300
2013-11-13 10:04:28 C 22 38 31.62 -13 36 23.2 o 300
2013-11-13 10:05:46 C 22 38 31.69 -13 36 21.3 o 300
2013-11-13 10:07:05 C 22 38 31.80 -13 36 20.1 o 300
2013-11-13 10:08:23 C 22 38 31.90 -13 36 19.0 o 300
2013-11-14 02:21:09 C 22 39 47.98 -13 22 09.6 q 703
2013-11-14 02:33:39 C 22 39 48.93 -13 21 58.8 q 703
2013-11-14 02:42:22 C 22 39 49.40 -13 21 52.1 u H21
2013-11-14 02:46:09 C 22 39 49.85 -13 21 48.2 q 703
2013-11-14 02:46:14 C 22 39 49.70 -13 21 48.5 u H21
2013-11-14 02:50:05 C 22 39 49.98 -13 21 45.4 u H21
2013-11-14 02:54:25 C 22 39 50.31 -13 21 41.5 u H21
2013-11-14 02:58:38 C 22 39 50.80 -13 21 37.3 q 703
2013-11-16 02:24:12 C 22 43 27.34 -12 41 35.0 u H21
2013-11-16 02:26:31 C 22 43 27.53 -12 41 33.7 u H21
2013-11-16 02:28:42 C 22 43 27.70 -12 41 32.0 u H21
2013-11-19 03:08:37 C 22 48 45.34 -11 43 40.9 u H21