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
2017-10-30 16:22:09 C 02 59 09.97 +22 09 04.2 q D29
2017-10-30 16:34:53 C 02 59 09.30 +22 09 02.3 q D29
2017-10-30 16:47:37 C 02 59 08.65 +22 09 00.2 q D29
2017-10-31 16:15:57 C 02 57 56.39 +22 05 13.2 q D29
2017-10-31 16:28:41 C 02 57 55.70 +22 05 10.9 q D29
2017-10-31 16:41:24 C 02 57 55.07 +22 05 08.6 q D29
2017-11-02 00:27:14 C 02 56 17.11 +21 59 53.9 18.4 u J43
2017-11-02 00:40:57 C 02 56 16.39 +21 59 51.8 18.7 u J43
2017-11-02 00:54:44 C 02 56 15.67 +21 59 49.3 18.6 u J43
2017-11-02 01:08:30 C 02 56 14.93 +21 59 47.3 18.6 u J43
2017-11-06 11:01:29 C 02 50 48.39 +21 41 20.9 U T05
2017-11-06 11:05:33 C 02 50 48.23 +21 41 20.0 U T05
2017-11-06 11:16:37 C 02 50 47.52 +21 41 18.1 U T05
2017-11-06 11:21:02 C 02 50 47.42 +21 41 17.6 U T05
2017-11-08 02:07:09 C 02 48 48.39 +21 34 09.1 q Z38
2017-11-08 14:31:18 C 02 48 10.75 +21 31 54.5 q D29
2017-11-08 14:51:39 C 02 48 09.70 +21 31 50.8 q D29
2017-11-08 15:12:02 C 02 48 08.63 +21 31 47.1 q D29
2017-11-09 23:33:30 C 02 46 30.36 +21 25 45.0 q Z38
2017-11-10 02:28:51 C 02 46 21.11 +21 25 08.8 q Z38
2017-11-10 10:07:06 C 02 45 58.23 +21 23 44.2 U T05
2017-11-10 10:22:38 C 02 45 57.40 +21 23 41.9 U T05
2017-11-10 10:42:28 C 02 45 56.39 +21 23 37.7 U T05
2017-11-10 10:43:07 C 02 45 56.38 +21 23 37.5 U T05
2017-11-11 23:46:46 C 02 44 04.85 +21 16 32.6 18.5 q J43
2017-11-11 23:59:21 C 02 44 04.19 +21 16 30.2 18.6 q J43
2017-11-12 00:11:52 C 02 44 03.55 +21 16 27.8 18.6 q J43
2017-11-12 00:24:23 C 02 44 02.93 +21 16 25.4 18.7 q J43
2017-11-13 10:56:05 C 02 42 19.977 +21 09 45.00 L F51
2017-11-13 11:16:23 C 02 42 18.955 +21 09 40.97 L F51
2017-11-13 11:36:42 C 02 42 17.934 +21 09 36.97 L F51
2017-11-13 21:29:08 C 02 41 48.85 +21 07 40.2 q Z38
2017-11-13 22:54:30 C 02 41 44.74 +21 07 23.8 q Z38
2017-11-14 05:45:39 C 02 41 24.46 +21 06 04.0 U G96
2017-11-14 05:51:43 C 02 41 24.17 +21 06 02.8 U G96
2017-11-14 05:57:47 C 02 41 23.86 +21 06 01.7 U G96
2017-11-14 06:03:51 C 02 41 23.55 +21 06 00.6 U G96
2017-11-14 06:26:57 C 02 41 22.44 +21 05 55.5 U 703
2017-11-14 06:35:08 C 02 41 21.98 +21 05 54.6 U 703
2017-11-14 06:43:18 C 02 41 21.51 +21 05 51.9 U 703
2017-11-14 06:51:27 C 02 41 21.04 +21 05 51.3 U 703
2017-11-16 01:58:54 C 02 39 15.29 +20 57 26.4 o W92
2017-11-16 03:40:07 C 02 39 10.39 +20 57 05.9 o W92
2017-11-16 03:44:02 C 02 39 10.10 +20 57 06.7 o W92
2017-11-16 04:38:41 C 02 39 07.48 +20 56 53.2 o W92
2017-11-16 09:52:44 C 02 38 52.37 +20 55 49.4 U T08
2017-11-16 10:04:39 C 02 38 51.83 +20 55 48.0 U T08
2017-11-16 10:14:07 C 02 38 51.34 +20 55 45.5 U T08
2017-11-16 10:32:29 C 02 38 50.51 +20 55 40.8 U T08
2017-11-18 07:47:35 C 02 36 41.17 +20 46 41.8 U 703