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
2020-09-25 12:29:19 C 03 19 23.70 +21 28 11.5 – V T08
2020-09-26 08:55:45 C 03 18 40.07 +21 27 14.7 – V 703
2020-09-26 09:03:17 C 03 18 39.79 +21 27 13.8 – V 703
2020-09-26 09:10:48 C 03 18 39.52 +21 27 14.1 – V 703
2020-09-26 09:18:19 C 03 18 39.23 +21 27 13.4 – V 703
2020-09-27 09:18:10 C 03 17 46.52 +21 25 59.1 – V G96
2020-09-27 09:27:14 C 03 17 46.17 +21 25 58.6 – V G96
2020-09-27 09:36:17 C 03 17 45.83 +21 25 58.2 – V G96
2020-09-27 09:45:18 C 03 17 45.48 +21 25 57.8 – V G96
2020-09-27 11:42:50 C 03 17 41.20 +21 25 51.5 – V T05
2020-09-27 11:50:05 C 03 17 40.92 +21 25 51.6 – V T05
2020-09-27 12:00:16 C 03 17 40.53 +21 25 51.1 – V T05
2020-09-27 12:31:55 C 03 17 39.30 +21 25 49.8 – V T05
2020-09-28 11:38:32 C 03 16 47.028 +21 24 31.31 – U F52
2020-09-28 11:55:07 C 03 16 46.379 +21 24 30.31 – U F52
2020-09-28 12:11:44 C 03 16 45.727 +21 24 29.46 – U F52
2020-09-28 12:28:28 C 03 16 45.066 +21 24 28.44 – U F52
2020-09-29 11:02:56 C 03 15 52.70 +21 23 05.7 – V T08
2020-09-29 11:30:46 C 03 15 51.58 +21 23 04.3 – V T08
2020-09-29 11:34:05 C 03 15 51.42 +21 23 03.7 – V T08
2020-09-29 11:41:44 C 03 15 51.12 +21 23 03.3 – V T08
2020-10-01 11:26:03 C 03 13 55.95 +21 19 48.0 – V T05
2020-10-01 11:30:06 C 03 13 55.82 +21 19 46.9 – V T05
2020-10-01 11:34:43 C 03 13 55.66 +21 19 46.5 – V T05
2020-10-01 12:05:35 C 03 13 54.28 +21 19 43.9 – V T05
2020-10-07 13:22:40 C 03 07 31.12 +21 06 52.9 – V T08
2020-10-07 13:26:49 C 03 07 30.92 +21 06 52.3 – V T08
2020-10-07 13:34:12 C 03 07 30.62 +21 06 51.7 – V T08
2020-10-07 13:51:10 C 03 07 29.78 +21 06 49.8 – V T08
2020-10-09 09:16:13 C 03 05 26.70 +21 02 06.5 – V 703
2020-10-09 09:24:48 C 03 05 26.31 +21 02 05.3 – V 703
2020-10-09 09:33:04 C 03 05 25.85 +21 02 05.0 – V 703
2020-10-09 09:41:03 C 03 05 25.45 +21 02 03.7 – V 703
2020-10-09 13:03:50 C 03 05 15.74 +21 01 41.5 – V T05
2020-10-09 13:07:56 C 03 05 15.51 +21 01 41.1 – V T05
2020-10-09 13:20:31 C 03 05 14.88 +21 01 39.7 – V T05
2020-10-09 13:35:10 C 03 05 14.19 +21 01 38.0 – V T05
2020-10-11 09:07:29 C 03 03 06.82 +20 56 28.0 – V 703
2020-10-11 09:15:10 C 03 03 06.44 +20 56 27.2 – V 703
2020-10-11 09:22:51 C 03 03 06.06 +20 56 25.8 – V 703
2020-10-11 09:30:32 C 03 03 05.70 +20 56 25.3 – V 703
2020-10-11 12:04:34 C 03 02 58.08 +20 56 06.8 – V T08
2020-10-11 12:16:56 C 03 02 57.44 +20 56 05.4 – V T08
2020-10-11 12:25:17 C 03 02 57.02 +20 56 04.6 – V T08
2020-10-11 12:41:55 C 03 02 56.19 +20 56 02.3 – V T08
2020-10-14 06:55:21 C 02 59 35.93 +20 47 22.7 – V G96
2020-10-14 07:02:44 C 02 59 35.55 +20 47 21.7 – V G96
2020-10-14 07:10:07 C 02 59 35.16 +20 47 20.7 – V G96
2020-10-14 07:17:30 C 02 59 34.77 +20 47 19.7 – V G96
2020-10-14 07:35:02 C 02 59 33.87 +20 47 17.3 – V 703