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
2020-10-14 07:42:36 C 02 59 33.50 +20 47 16.6 – V 703
2020-10-14 07:50:10 C 02 59 33.08 +20 47 15.2 – V 703
2020-10-14 07:57:44 C 02 59 32.69 +20 47 14.4 – V 703
2020-10-15 09:28:16 C 02 58 13.758 +20 43 40.59 – U F51
2020-10-15 09:47:21 C 02 58 12.752 +20 43 37.92 – U F51
2020-10-15 12:38:45 C 02 58 03.67 +20 43 13.4 – V T08
2020-10-15 12:49:29 C 02 58 03.10 +20 43 12.1 – V T08
2020-10-15 13:35:52 C 02 58 00.64 +20 43 05.5 – V T08
2020-10-15 13:55:07 C 02 57 59.631 +20 43 02.38 – U F51
2020-10-15 14:31:35 C 02 57 57.709 +20 42 57.03 – U F51
2020-10-15 14:49:48 C 02 57 56.747 +20 42 54.38 – U F51
2020-10-17 06:24:45 C 02 55 52.45 +20 37 03.5 – V 703
2020-10-17 06:32:22 C 02 55 52.02 +20 37 02.0 – V 703
2020-10-17 06:39:58 C 02 55 51.61 +20 37 00.8 – V 703
2020-10-17 06:47:34 C 02 55 51.20 +20 36 59.5 – V 703
2020-10-17 11:45:05 C 02 55 35.38 +20 36 15.6 – V T05
2020-10-17 12:30:10 C 02 55 32.93 +20 36 08.5 – V T05
2020-10-17 12:34:47 C 02 55 32.67 +20 36 07.7 – V T05
2020-10-17 12:42:41 C 02 55 32.31 +20 36 06.9 – V T05
2020-10-18 08:48:21 C 02 54 28.20 +20 32 59.6 – U I41
2020-10-18 09:50:11 C 02 54 24.85 +20 32 50.0 – U I41
2020-10-19 09:46:37 C 02 53 08.06 +20 29 02.6 – V T08
2020-10-19 10:05:55 C 02 53 06.99 +20 28 59.6 – V T08
2020-10-19 10:08:59 C 02 53 06.83 +20 28 59.0 – V T08
2020-10-19 10:16:29 C 02 53 06.41 +20 28 57.9 – V T08
2020-10-20 01:30:28 C 02 52 17.32 +20 26 27.4 – V W33
2020-10-20 01:33:19 C 02 52 17.15 +20 26 26.7 – V W33
2020-10-20 01:36:11 C 02 52 16.93 +20 26 27.1 – V W33
2020-10-20 06:55:26 C 02 51 59.60 +20 25 35.1 – V 703
2020-10-20 07:03:00 C 02 51 59.18 +20 25 33.6 – V 703
2020-10-20 07:10:34 C 02 51 58.76 +20 25 32.3 – V 703
2020-10-20 07:18:08 C 02 51 58.35 +20 25 31.1 – V 703
2020-10-21 04:47:56 C 02 50 48.51 +20 21 55.7 – q 858
2020-10-21 05:21:28 C 02 50 46.65 +20 21 50.1 – q 858
2020-10-21 05:53:51 C 02 50 44.87 +20 21 44.8 – q 858
2020-10-22 08:50:53 C 02 49 16.698 +20 17 08.54 – U F52
2020-10-22 09:08:32 C 02 49 15.715 +20 17 05.51 – U F52
2020-10-22 09:25:29 C 02 49 14.61 +20 17 01.9 – U I41
2020-10-22 09:26:15 C 02 49 14.731 +20 17 02.49 – U F52
2020-10-22 09:43:54 C 02 49 13.750 +20 16 59.47 – U F52
2020-10-22 09:50:29 C 02 49 13.22 +20 16 57.5 – U I41
2020-10-23 08:01:28 C 02 48 00.37 +20 13 03.9 – V G96
2020-10-23 08:08:49 C 02 47 59.96 +20 13 02.6 – V G96
2020-10-23 08:16:13 C 02 47 59.55 +20 13 01.3 – V G96
2020-10-23 08:23:35 C 02 47 59.14 +20 13 00.0 – V G96
2020-10-23 11:11:41 C 02 47 49.92 +20 12 31.1 – V T08
2020-10-23 11:16:19 C 02 47 49.67 +20 12 30.2 – V T08
2020-10-23 11:24:31 C 02 47 49.20 +20 12 29.0 – V T08
2020-10-23 11:41:19 C 02 47 48.25 +20 12 25.8 – V T08
2020-10-24 08:20:35 C 02 46 40.06 +20 08 42.1 – V 703