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
2026-01-21 21:27:12 C 04 28 17.02 +40 22 21.7 X C40
2026-01-21 21:29:08 C 04 28 16.79 +40 22 21.1 X C40
2026-01-21 21:31:04 C 04 28 16.58 +40 22 20.1 X C40
2026-01-21 21:36:48 B 04 28 16.394 +40 22 21.54 X J51
2026-01-21 21:39:55 C 04 28 15.65 +40 22 16.4 X C40
2026-01-21 21:41:38 C 04 28 15.48 +40 22 15.7 X C40
2026-01-21 21:43:21 C 04 28 15.31 +40 22 15.0 X C40
2026-01-21 21:45:05 C 04 28 15.10 +40 22 14.1 X C40
2026-01-21 21:46:47 C 04 28 14.93 +40 22 13.6 X C40
2026-01-21 21:48:55 B 04 28 15.108 +40 22 16.64 X J51
2026-01-21 22:00:58 B 04 28 13.853 +40 22 11.86 X J51
2026-01-21 23:08:24 C 04 28 06.643 +40 21 41.08 Z C23
2026-01-22 18:20:03 B 04 26 10.214 +40 14 01.46 X L65
2026-01-22 18:24:11 B 04 26 09.799 +40 13 59.95 X L65
2026-01-22 18:28:19 B 04 26 09.374 +40 13 58.22 X L65
2026-01-24 07:45:07 C 04 22 29.462 +39 58 42.28 V T05
2026-01-24 07:49:45 C 04 22 29.009 +39 58 40.40 V T05
2026-01-24 07:58:58 C 04 22 28.092 +39 58 36.41 V T05
2026-01-24 08:21:25 C 04 22 25.886 +39 58 26.83 V T05
2026-01-24 08:53:19 C 04 22 22.754 +39 58 13.12 V T05
2026-01-27 19:29:46 B 04 14 54.269 +39 22 32.84 X R20
2026-01-27 19:54:42 B 04 14 52.068 +39 22 21.86 X R20
2026-01-27 20:19:31 B 04 14 49.882 +39 22 10.78 X R20
2026-01-29 21:47:17 B 04 10 45.701 +39 00 02.20 X J51
2026-01-29 21:58:17 B 04 10 44.842 +38 59 57.05 X J51
2026-01-29 22:09:23 B 04 10 43.908 +38 59 51.83 X J51
2026-01-30 22:38:42 B 04 08 50.098 +38 48 46.58 X J51
2026-01-30 22:49:49 B 04 08 49.210 +38 48 41.08 X J51
2026-01-30 23:00:44 B 04 08 48.365 +38 48 36.47 X J51
2026-01-31 07:48:23 C 04 08 08.695 +38 44 37.61 V T08
2026-01-31 07:53:01 C 04 08 08.340 +38 44 35.59 V T08
2026-01-31 08:04:13 C 04 08 07.476 +38 44 30.30 V T08
2026-01-31 08:27:57 C 04 08 05.654 +38 44 19.07 V T08
2026-01-31 22:33:13 C 04 07 03.442 +38 37 49.40 Z C23
2026-01-31 22:52:49 C 04 07 01.985 +38 37 39.50 Z C23
2026-01-31 23:29:06 C 04 06 59.318 +38 37 23.09 Z C23
2026-02-01 08:24:16 C 04 06 20.686 +38 33 23.90 V T08
2026-02-01 08:28:52 C 04 06 20.338 +38 33 21.64 V T08
2026-02-01 09:00:33 C 04 06 18.024 +38 33 06.73 V T08
2026-02-01 09:11:08 C 04 06 17.246 +38 33 01.84 V T08
2026-02-01 22:36:05 B 04 05 20.642 +38 26 53.48 X J51
2026-02-01 22:56:16 B 04 05 19.147 +38 26 44.02 X J51
2026-02-01 23:16:44 B 04 05 17.640 +38 26 34.62 X J51
2026-02-02 09:28:01 C 04 04 35.352 +38 21 54.54 V T05
2026-02-02 09:33:19 C 04 04 34.985 +38 21 52.34 V T05
2026-02-02 09:42:35 C 04 04 34.337 +38 21 47.81 V T05
2026-02-02 09:56:56 C 04 04 33.336 +38 21 40.82 V T05
2026-02-02 19:37:22 C 04 03 54.470 +38 17 13.09 Z C23
2026-02-02 20:00:18 C 04 03 52.980 +38 17 02.54 Z C23
2026-02-02 20:32:04 C 04 03 50.791 +38 16 48.50 Z C23