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
2022-12-06 04:30:35 C 09 46 41.51 +35 00 57.6 q X33
2022-12-06 04:33:03 C 09 46 41.67 +35 00 57.4 q X33
2022-12-06 04:35:31 C 09 46 42.04 +35 00 59.0 q X33
2022-12-14 12:33:50 C 10 10 40.867 +36 48 25.09 V T05
2022-12-14 12:36:26 C 10 10 41.225 +36 48 26.75 V T05
2022-12-14 13:03:56 C 10 10 44.914 +36 48 44.75 V T05
2022-12-14 13:13:46 C 10 10 46.226 +36 48 51.12 V T05
2022-12-20 08:20:57 C 10 32 29.310 +38 28 40.15 V 703
2022-12-20 08:28:46 C 10 32 30.685 +38 28 46.63 V 703
2022-12-20 08:36:37 C 10 32 32.053 +38 28 53.15 V 703
2022-12-20 08:44:27 C 10 32 33.432 +38 28 59.63 V 703
2022-12-23 08:06:44 C 10 46 20.086 +39 29 37.03 V 703
2022-12-23 08:14:34 C 10 46 21.702 +39 29 44.27 V 703
2022-12-23 08:22:24 C 10 46 23.326 +39 29 51.43 V 703
2022-12-23 08:30:14 C 10 46 24.942 +39 29 58.74 V 703
2022-12-26 09:13:01 C 11 03 08.784 +40 38 15.50 V 703
2022-12-26 09:21:36 C 11 03 10.915 +40 38 24.11 V 703
2022-12-26 09:30:11 C 11 03 13.046 +40 38 32.86 V 703
2022-12-26 09:38:46 C 11 03 15.188 +40 38 41.35 V 703
2023-01-01 20:39:59 C 11 53 12.11 +43 14 54.5 X L99
2023-01-01 20:41:36 C 11 53 12.82 +43 14 56.3 X L99
2023-01-01 20:43:06 C 11 53 13.32 +43 14 57.9 X L99
2023-01-01 20:44:36 C 11 53 13.97 +43 14 59.2 X L99
2023-01-09 09:31:08 C 13 34 46.960 +44 31 49.48 V 703
2023-01-09 09:38:59 C 13 34 52.691 +44 31 45.12 V 703
2023-01-09 09:46:49 C 13 34 58.418 +44 31 40.58 V 703
2023-01-09 09:54:39 C 13 35 04.110 +44 31 36.05 V 703
2023-01-11 03:47:13 C 14 07 23.97 +43 46 16.0 V M34
2023-01-11 04:08:32 C 14 07 41.05 +43 45 42.9 V M34
2023-01-11 04:31:18 C 14 07 59.24 +43 45 07.3 V M34
2023-01-11 23:56:18 C 14 23 58.61 +43 09 01.4 V J37
2023-01-12 00:26:08 C 14 24 23.63 +43 08 00.5 V J37
2023-01-12 00:46:04 C 14 24 40.37 +43 07 19.3 V J37
2023-01-12 01:04:00 C 14 24 55.38 +43 06 42.6 V J37
2023-01-12 01:19:56 C 14 25 08.71 +43 06 10.0 V J37
2023-01-13 11:12:48 C 14 54 01.076 +41 36 54.11 V 703
2023-01-13 11:20:40 C 14 54 07.812 +41 36 29.74 V 703
2023-01-13 11:28:31 C 14 54 14.555 +41 36 05.51 V 703
2023-01-13 11:36:23 C 14 54 21.294 +41 35 41.14 V 703
2023-01-15 15:02:22 C 15 38 56.729 +38 11 32.57 V T05
2023-01-15 15:47:04 C 15 39 34.714 +38 08 01.86 V T05
2023-01-15 16:02:09 C 15 39 47.503 +38 06 50.18 V T05
2023-01-17 04:38:26 C 16 10 35.126 +34 51 56.13 V Z01
2023-01-17 04:44:21 C 16 10 39.931 +34 51 22.24 V Z01
2023-01-17 04:50:53 C 16 10 45.244 +34 50 45.17 V Z01
2023-01-18 02:48:19 C 16 28 22.500 +32 37 40.83 V M33
2023-01-18 02:56:59 C 16 28 29.253 +32 36 47.07 V M33
2023-01-18 03:04:37 C 16 28 35.224 +32 35 59.33 V M33
2023-01-21 01:49:54 C 17 19 25.66 +24 35 18.4 c M31
2023-01-21 02:02:21 C 17 19 33.71 +24 33 51.3 c M31