IAA RAS IAA Minor Planet Database

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
2020-09-17 12:10:20 C 03 25 19.35 +21 33 12.3 – V T08
2020-09-17 12:11:00 C 03 25 19.31 +21 33 12.7 – V T08
2020-09-17 12:11:40 C 03 25 19.26 +21 33 12.6 – V T08
2020-09-17 12:12:19 C 03 25 19.29 +21 33 12.9 – V T08
2020-09-17 12:12:59 C 03 25 19.24 +21 33 12.5 – V T08
2020-09-17 12:13:39 C 03 25 19.23 +21 33 12.2 – V T08
2020-09-17 12:14:19 C 03 25 19.24 +21 33 13.2 – V T08
2020-09-17 12:14:59 C 03 25 19.19 +21 33 12.5 – V T08
2020-09-17 12:15:39 C 03 25 19.17 +21 33 12.8 – V T08
2020-09-17 12:16:19 C 03 25 19.15 +21 33 12.2 – V T08
2020-09-17 12:16:58 C 03 25 19.15 +21 33 13.0 – V T08
2020-09-17 12:17:38 C 03 25 19.09 +21 33 13.1 – V T08
2020-09-17 12:18:18 C 03 25 19.11 +21 33 12.4 – V T08
2020-09-17 12:18:58 C 03 25 19.08 +21 33 11.7 – V T08
2020-09-17 12:19:37 C 03 25 19.05 +21 33 12.3 – V T08
2020-09-17 12:20:17 C 03 25 19.07 +21 33 12.4 – V T08
2020-09-17 12:20:57 C 03 25 19.04 +21 33 12.5 – V T08
2020-09-17 12:21:37 C 03 25 19.02 +21 33 12.6 – V T08
2020-09-17 12:22:17 C 03 25 19.02 +21 33 12.6 – V T08
2020-09-17 12:22:56 C 03 25 18.94 +21 33 12.0 – V T08
2020-09-17 12:23:36 C 03 25 18.97 +21 33 12.1 – V T08
2020-09-17 12:24:16 C 03 25 18.95 +21 33 12.3 – V T08
2020-09-17 12:24:56 C 03 25 18.93 +21 33 12.4 – V T08
2020-09-17 12:25:36 C 03 25 18.90 +21 33 12.3 – V T08
2020-09-17 12:26:16 C 03 25 18.88 +21 33 12.1 – V T08
2020-09-17 12:26:55 C 03 25 18.90 +21 33 12.2 – V T08
2020-09-17 12:27:35 C 03 25 18.86 +21 33 12.6 – V T08
2020-09-17 12:28:15 C 03 25 18.86 +21 33 12.5 – V T08
2020-09-17 12:28:54 C 03 25 18.82 +21 33 12.5 – V T08
2020-09-17 12:29:34 C 03 25 18.81 +21 33 12.5 – V T08
2020-09-17 12:30:14 C 03 25 18.77 +21 33 12.4 – V T08
2020-09-17 12:30:54 C 03 25 18.76 +21 33 12.6 – V T08
2020-09-20 08:57:01 C 03 23 23.88 +21 32 12.3 – V 703
2020-09-20 09:04:37 C 03 23 23.59 +21 32 12.1 – V 703
2020-09-20 09:12:13 C 03 23 23.38 +21 32 12.0 – V 703
2020-09-20 09:19:49 C 03 23 23.15 +21 32 12.0 – V 703
2020-09-21 12:59:09 C 03 22 32.99 +21 31 33.1 – V T08
2020-09-21 13:02:30 C 03 22 32.88 +21 31 32.9 – V T08
2020-09-21 13:15:09 C 03 22 32.49 +21 31 33.1 – V T08
2020-09-21 13:47:26 C 03 22 31.42 +21 31 31.8 – V T08
2020-09-23 10:56:19 C 03 21 04.89 +21 30 08.8 – V 703
2020-09-23 11:03:52 C 03 21 04.61 +21 30 07.7 – V 703
2020-09-23 11:11:23 C 03 21 04.40 +21 30 07.8 – V 703
2020-09-23 11:18:55 C 03 21 04.10 +21 30 07.8 – V 703
2020-09-23 23:21:46 C 03 20 40.25 +21 29 40.6 – V K88
2020-09-23 23:34:14 C 03 20 39.82 +21 29 40.1 – V K88
2020-09-23 23:46:27 C 03 20 39.41 +21 29 39.6 – V K88
2020-09-25 12:00:53 C 03 19 24.75 +21 28 12.6 – V T08
2020-09-25 12:04:55 C 03 19 24.55 +21 28 12.4 – V T08
2020-09-25 12:08:58 C 03 19 24.46 +21 28 12.1 – V T08