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
2020-10-24 08:28:07 C 02 46 39.58 +20 08 41.6 – V 703
2020-10-24 08:35:40 C 02 46 39.23 +20 08 39.7 – V 703
2020-10-24 08:47:24 C 02 46 38.60 +20 08 37.2 – V 703
2020-10-25 11:37:07 C 02 45 09.77 +20 03 43.5 – V T05
2020-10-25 11:41:08 C 02 45 09.57 +20 03 42.4 – V T05
2020-10-25 11:49:04 C 02 45 09.12 +20 03 41.0 – V T05
2020-10-25 12:05:08 C 02 45 08.19 +20 03 37.9 – V T05
2020-10-27 04:53:39 C 02 42 53.00 +19 55 55.7 – V 703
2020-10-27 05:00:37 C 02 42 52.56 +19 55 54.3 – V 703
2020-10-27 05:07:34 C 02 42 52.21 +19 55 53.3 – V 703
2020-10-27 05:14:32 C 02 42 51.78 +19 55 51.0 – V 703
2020-11-04 11:04:06 C 02 31 58.56 +19 15 46.7 – V T08
2020-11-04 11:11:30 C 02 31 58.14 +19 15 44.8 – V T08
2020-11-04 11:15:29 C 02 31 57.91 +19 15 44.3 – V T08
2020-11-04 11:30:19 C 02 31 57.09 +19 15 41.3 – V T08
2020-11-05 03:22:26 C 02 31 05.80 +19 12 17.2 – q V19
2020-11-05 03:52:43 C 02 31 04.20 +19 12 10.6 – q V19
2020-11-05 04:35:24 C 02 31 01.84 +19 12 02.2 – o 691
2020-11-05 05:04:26 C 02 31 00.25 +19 11 56.1 – o 691
2020-11-05 05:33:26 C 02 30 58.65 +19 11 50.2 – o 691
2020-11-06 22:55:37 C 02 28 45.48 +19 02 56.2 – V 130
2020-11-06 22:58:28 C 02 28 45.32 +19 02 55.7 – V 130
2020-11-06 23:01:20 C 02 28 45.17 +19 02 55.0 – V 130
2020-11-06 23:04:12 C 02 28 45.03 +19 02 54.5 – V 130
2020-11-09 04:16:44 C 02 25 56.57 +18 51 22.8 – V V19
2020-11-09 04:56:35 C 02 25 54.44 +18 51 14.1 – V V19
2020-11-09 05:34:41 C 02 25 52.44 +18 51 05.7 – V V19
2020-11-09 15:49:31 C 02 25 20.27 +18 48 51.8 – q D29
2020-11-09 16:09:53 C 02 25 19.20 +18 48 47.3 – q D29
2020-11-09 16:30:15 C 02 25 18.11 +18 48 43.0 – q D29
2020-11-10 07:03:55 C 02 24 32.80 +18 45 32.4 – V 703
2020-11-10 07:11:32 C 02 24 32.43 +18 45 30.7 – V 703
2020-11-10 07:19:09 C 02 24 32.01 +18 45 29.2 – V 703
2020-11-10 07:26:46 C 02 24 31.53 +18 45 26.6 – V 703
2020-11-10 10:05:28 C 02 24 23.47 +18 44 53.2 – V T05
2020-11-10 10:10:10 C 02 24 23.20 +18 44 51.5 – V T05
2020-11-10 10:19:30 C 02 24 22.69 +18 44 50.4 – V T05
2020-11-10 10:38:48 C 02 24 21.68 +18 44 46.2 – V T05
2020-11-11 05:33:38 C 02 23 23.45 +18 40 37.2 – V G96
2020-11-11 05:41:01 C 02 23 23.07 +18 40 35.5 – V G96
2020-11-11 05:48:25 C 02 23 22.69 +18 40 33.8 – V G96
2020-11-11 05:55:51 C 02 23 22.29 +18 40 32.1 – V G96
2020-11-13 05:22:37 C 02 20 58.32 +18 30 09.0 – V 703
2020-11-13 05:30:48 C 02 20 57.87 +18 30 07.3 – V 703
2020-11-13 05:39:00 C 02 20 57.39 +18 30 05.8 – V 703
2020-11-13 05:47:11 C 02 20 57.04 +18 30 03.2 – V 703
2020-11-14 05:38:50 C 02 19 45.93 +18 24 50.1 – U I41
2020-11-14 07:45:31 C 02 19 39.57 +18 24 22.4 – U I41
2020-11-16 05:39:01 C 02 17 25.84 +18 14 21.9 – V 703
2020-11-16 05:54:10 C 02 17 25.11 +18 14 19.1 – V 703