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
2020-08-26 13:37:43 C 03 32 43.97 +21 15 28.4 – V T05
2020-08-26 13:41:42 C 03 32 43.95 +21 15 27.5 – V T05
2020-08-26 14:03:48 C 03 32 43.92 +21 15 29.8 – V T05
2020-08-26 14:11:25 C 03 32 43.91 +21 15 30.5 – V T05
2020-08-28 13:35:44 C 03 32 34.60 +21 18 43.6 – V T08
2020-08-28 13:42:11 C 03 32 34.56 +21 18 43.8 – V T08
2020-08-28 13:46:16 C 03 32 34.54 +21 18 44.0 – V T08
2020-08-28 14:02:14 C 03 32 34.46 +21 18 45.1 – V T08
2020-09-01 12:10:49 C 03 31 58.54 +21 24 14.9 – V T08
2020-09-01 12:17:35 C 03 31 58.48 +21 24 15.8 – V T08
2020-09-01 12:22:15 C 03 31 58.47 +21 24 15.9 – V T08
2020-09-01 12:30:13 C 03 31 58.43 +21 24 16.3 – V T08
2020-09-01 12:55:16 C 03 31 58.151 +21 24 17.58 – U F51
2020-09-01 13:13:14 C 03 31 57.983 +21 24 18.58 – U F51
2020-09-01 13:31:07 C 03 31 57.816 +21 24 19.57 – U F51
2020-09-01 13:49:02 C 03 31 57.647 +21 24 20.55 – U F51
2020-09-01 18:25:14 C 03 31 55.28 +21 24 33.6 – q D29
2020-09-01 18:43:00 C 03 31 55.06 +21 24 34.1 – q D29
2020-09-01 19:00:46 C 03 31 54.96 +21 24 35.0 – q D29
2020-09-02 13:04:03 C 03 31 45.053 +21 25 30.61 – U F51
2020-09-02 13:21:00 C 03 31 44.873 +21 25 31.52 – U F51
2020-09-02 13:37:58 C 03 31 44.701 +21 25 32.40 – U F51
2020-09-02 13:55:10 C 03 31 44.515 +21 25 33.26 – U F51
2020-09-11 14:39:50 C 03 28 34.57 +21 32 38.2 – V T05
2020-09-11 14:59:59 C 03 28 34.17 +21 32 38.4 – V T05
2020-09-11 15:07:54 C 03 28 34.02 +21 32 38.7 – V T05
2020-09-11 15:12:47 C 03 28 33.95 +21 32 39.1 – V T05
2020-09-13 11:33:19 C 03 27 38.95 +21 33 11.0 – V T08
2020-09-13 11:37:58 C 03 27 38.85 +21 33 11.0 – V T08
2020-09-13 12:28:45 C 03 27 37.69 +21 33 11.6 – V T08
2020-09-13 12:48:03 C 03 27 37.26 +21 33 12.3 – V T08
2020-09-14 09:52:29 C 03 27 08.97 +21 33 19.4 – V G96
2020-09-14 10:00:33 C 03 27 08.78 +21 33 19.6 – V G96
2020-09-14 10:08:38 C 03 27 08.59 +21 33 19.6 – V G96
2020-09-14 10:16:44 C 03 27 08.40 +21 33 19.5 – V G96
2020-09-15 13:11:22 C 03 26 30.50 +21 33 24.4 – V T05
2020-09-15 13:14:00 C 03 26 30.41 +21 33 24.3 – V T05
2020-09-15 13:17:58 C 03 26 30.31 +21 33 24.8 – V T05
2020-09-15 13:52:44 C 03 26 29.43 +21 33 24.6 – V T05
2020-09-17 11:55:01 C 03 25 19.75 +21 33 13.0 – V T08
2020-09-17 12:00:23 C 03 25 19.60 +21 33 12.4 – V T08
2020-09-17 12:04:22 C 03 25 19.49 +21 33 12.4 – V T08
2020-09-17 12:05:02 C 03 25 19.45 +21 33 12.5 – V T08
2020-09-17 12:05:41 C 03 25 19.47 +21 33 12.8 – V T08
2020-09-17 12:06:21 C 03 25 19.44 +21 33 12.6 – V T08
2020-09-17 12:07:01 C 03 25 19.40 +21 33 12.7 – V T08
2020-09-17 12:07:41 C 03 25 19.40 +21 33 13.0 – V T08
2020-09-17 12:08:21 C 03 25 19.40 +21 33 12.5 – V T08
2020-09-17 12:09:00 C 03 25 19.37 +21 33 12.5 – V T08
2020-09-17 12:09:40 C 03 25 19.38 +21 33 12.7 – V T08