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
2007-11-18 04:55:09 C 01 28 25.60 +11 18 40.6 r G96
2007-11-18 05:04:49 C 01 28 25.21 +11 18 38.6 r G96
2007-11-18 20:58:07 C 01 27 45.71 +11 15 32.2 c A24
2007-12-15 04:03:08 C 01 12 34.66 +10 05 42.6 w 699
2007-12-15 04:43:43 C 01 12 34.27 +10 05 41.5 w 699
2007-12-15 05:23:52 C 01 12 33.92 +10 05 40.0 w 699
2007-12-15 06:03:58 C 01 12 33.55 +10 05 39.7 w 699
2008-10-06 08:11:01 C 04 13 27.50 +27 40 40.4 19.2 c 704
2008-10-06 08:29:17 C 04 13 27.07 +27 40 40.0 20.1 c 704
2008-10-06 08:47:33 C 04 13 26.60 +27 40 40.3 20.1 c 704
2008-10-06 09:05:46 C 04 13 26.14 +27 40 41.3 19.2 c 704
2008-10-06 09:24:00 C 04 13 25.72 +27 40 41.5 19.8 c 704
2008-10-06 10:43:21 C 04 13 23.70 +27 40 44.7 r 703
2008-10-06 10:53:36 C 04 13 23.37 +27 40 45.7 r 703
2008-10-06 11:04:18 C 04 13 23.12 +27 40 47.1 r 703
2008-10-06 11:14:52 C 04 13 22.87 +27 40 46.4 r 703
2008-10-21 09:12:47 C 04 02 08.51 +27 43 34.9 o 691
2008-10-21 09:38:51 C 04 02 07.50 +27 43 34.2 o 691
2008-10-21 10:04:26 C 04 02 06.50 +27 43 33.8 o 691
2008-10-25 07:39:28 C 03 58 26.55 +27 41 05.7 o 691
2008-10-25 08:04:57 C 03 58 25.50 +27 41 05.0 o 691
2008-10-25 08:30:27 C 03 58 24.45 +27 41 04.2 o 691
2008-11-02 07:26:08 C 03 50 10.06 +27 31 20.5 19.2 c 704
2008-11-02 07:43:02 C 03 50 09.32 +27 31 18.6 19.5 c 704
2008-11-02 07:49:35 C 03 50 08.99 +27 31 19.2 o 691
2008-11-02 08:00:01 C 03 50 08.54 +27 31 17.6 19.1 c 704
2008-11-02 08:14:59 C 03 50 07.80 +27 31 17.5 o 691
2008-11-02 08:16:59 C 03 50 07.74 +27 31 16.7 19.2 c 704
2008-11-02 08:33:54 C 03 50 06.84 +27 31 15.7 19.1 c 704
2008-11-02 08:40:53 C 03 50 06.60 +27 31 15.6 o 691
2008-11-04 06:05:49 C 03 48 01.70 +27 27 59.9 19.0 c 704
2008-11-04 06:22:46 C 03 48 00.96 +27 27 58.6 19.3 c 704
2008-11-04 06:40:08 C 03 48 00.10 +27 27 56.5 19.4 c 704
2008-11-04 06:57:05 C 03 47 59.36 +27 27 55.7 19.2 c 704
2008-11-04 07:14:03 C 03 47 58.63 +27 27 55.5 19.8 c 704
2008-11-06 07:41:47 C 03 45 42.71 +27 24 00.2 o 691
2008-11-06 08:07:20 C 03 45 41.48 +27 23 58.0 o 691
2008-11-06 08:32:57 C 03 45 40.26 +27 23 55.8 o 691
2008-11-15 21:02:33 C 03 34 38.23 +27 00 04.9 r A13
2008-11-15 21:29:15 C 03 34 36.92 +27 00 01.5 r A13
2008-11-18 05:06:04 C 03 31 53.43 +26 52 58.4 r 703
2008-11-18 05:15:57 C 03 31 52.93 +26 52 56.8 r 703
2008-11-18 05:25:46 C 03 31 52.53 +26 52 55.6 r 703
2008-11-18 05:35:38 C 03 31 51.92 +26 52 53.7 r 703
2008-11-21 07:43:45 C 03 28 14.61 +26 42 47.7 18.8 c 704
2008-11-21 08:01:52 C 03 28 13.71 +26 42 45.6 19.3 c 704
2008-11-21 08:20:32 C 03 28 12.81 +26 42 42.9 19.1 c 704
2008-11-21 08:38:31 C 03 28 11.95 +26 42 40.5 19.2 c 704
2008-11-21 08:56:39 C 03 28 11.00 +26 42 37.4 19.2 c 704
2008-12-06 04:59:59 C 03 11 43.74 +25 46 02.6 20.2 c 704