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
2023-10-14 07:38:51 C 02 38 01.388 +17 52 07.36 – V 703
2023-10-14 10:07:44 C 02 37 52.198 +17 51 39.82 – V T05
2023-10-14 10:11:00 C 02 37 52.003 +17 51 38.59 – V T05
2023-10-14 10:18:37 C 02 37 51.497 +17 51 37.15 – V T05
2023-10-16 07:11:18 C 02 35 05.525 +17 42 26.46 – V 703
2023-10-16 07:19:11 C 02 35 05.039 +17 42 24.73 – V 703
2023-10-16 07:27:05 C 02 35 04.535 +17 42 22.82 – V 703
2023-10-16 07:34:59 C 02 35 04.038 +17 42 21.38 – V 703
2023-10-16 10:08:01 C 02 34 54.593 +17 41 50.21 – V T05
2023-10-16 10:12:35 C 02 34 54.305 +17 41 49.13 – V T05
2023-10-16 10:17:15 C 02 34 53.988 +17 41 48.26 – V T05
2023-10-16 10:25:04 C 02 34 53.513 +17 41 46.50 – V T05
2023-10-18 07:59:34 C 02 32 03.311 +17 32 02.90 – V 703
2023-10-18 08:07:23 C 02 32 02.814 +17 32 01.00 – V 703
2023-10-18 08:15:12 C 02 32 02.314 +17 31 59.41 – V 703
2023-10-18 08:23:07 C 02 32 01.828 +17 31 57.86 – V 703
2023-10-18 11:39:45 C 02 31 49.493 +17 31 15.82 – V T05
2023-10-18 12:29:23 C 02 31 46.361 +17 31 04.98 – V T05
2023-10-18 12:34:03 C 02 31 46.054 +17 31 03.76 – V T05
2023-10-18 13:15:00 C 02 31 43.457 +17 30 54.97 – V T05
2023-10-20 10:02:32 C 02 28 55.442 +17 21 00.00 – V T05
2023-10-20 10:05:08 C 02 28 55.306 +17 20 59.28 – V T05
2023-10-20 10:09:09 C 02 28 55.039 +17 20 58.34 – V T05
2023-10-20 10:17:44 C 02 28 54.480 +17 20 56.33 – V T05
2023-10-21 07:27:43 C 02 27 34.808 +17 16 07.86 – V 703
2023-10-21 07:35:27 C 02 27 34.294 +17 16 06.02 – V 703
2023-10-21 07:43:12 C 02 27 33.829 +17 16 04.69 – V 703
2023-10-21 07:50:56 C 02 27 33.325 +17 16 03.04 – V 703
2023-10-22 06:00:30 C 02 26 10.043 +17 10 58.58 – V 703
2023-10-22 06:07:40 C 02 26 09.582 +17 10 56.28 – V 703
2023-10-22 06:14:52 C 02 26 09.136 +17 10 55.02 – V 703
2023-10-22 06:22:04 C 02 26 08.653 +17 10 53.29 – V 703
2023-10-22 11:18:37 C 02 25 49.963 +17 09 45.22 – V T05
2023-10-22 11:23:11 C 02 25 49.654 +17 09 44.06 – V T05
2023-10-22 11:31:12 C 02 25 49.162 +17 09 42.16 – V T05
2023-10-22 15:30:00 C 02 25 34.320 +17 08 50.35 – V P07
2023-10-22 17:09:32 C 02 25 27.950 +17 08 26.70 – V P07
2023-10-22 18:00:00 C 02 25 24.734 +17 08 15.11 – V P07
2023-10-22 18:46:51 C 02 25 21.778 +17 08 04.70 – V P07
2023-10-23 04:16:43 C 02 24 46.238 +17 05 51.90 – V W68
2023-10-23 04:19:19 C 02 24 46.051 +17 05 50.93 – V W68
2023-10-23 04:23:56 C 02 24 45.792 +17 05 50.39 – V W68
2023-10-23 04:56:28 C 02 24 43.704 +17 05 42.32 – V W68
2023-10-24 11:06:34 C 02 22 50.390 +16 58 32.77 – V T05
2023-10-24 11:11:07 C 02 22 50.112 +16 58 31.69 – V T05
2023-10-24 11:40:45 C 02 22 48.223 +16 58 24.67 – V T05
2023-10-24 12:07:03 C 02 22 46.550 +16 58 18.26 – V T05
2023-10-25 05:28:14 C 02 21 41.604 +16 54 14.11 – V W68
2023-10-25 05:42:58 C 02 21 40.687 +16 54 10.62 – V W68
2023-10-25 06:33:08 C 02 21 37.493 +16 53 58.02 – V W68