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
2025-12-31 23:16:06 B 05 30 00.118 +42 08 13.49 q Y84
2025-12-31 23:23:09 B 05 29 59.186 +42 08 13.60 q Y84
2025-12-31 23:30:12 B 05 29 58.246 +42 08 13.78 q Y84
2025-12-31 23:39:04 B 05 29 57.065 +42 08 13.88 q Y84
2025-12-31 23:47:55 B 05 29 55.882 +42 08 14.06 q Y84
2025-12-31 23:54:58 B 05 29 54.962 +42 08 14.46 q Y84
2026-01-01 00:02:01 B 05 29 54.014 +42 08 14.32 q Y84
2026-01-01 00:10:56 B 05 29 52.822 +42 08 14.39 q Y84
2026-01-01 00:19:49 B 05 29 51.634 +42 08 14.60 q Y84
2026-01-01 00:26:53 B 05 29 50.702 +42 08 14.75 q Y84
2026-01-01 00:33:56 B 05 29 49.766 +42 08 14.71 q Y84
2026-01-01 00:42:52 B 05 29 48.583 +42 08 14.64 q Y84
2026-01-01 00:51:49 B 05 29 47.400 +42 08 14.78 q Y84
2026-01-01 00:58:52 B 05 29 46.459 +42 08 14.89 q Y84
2026-01-01 01:05:54 B 05 29 45.533 +42 08 15.11 q Y84
2026-01-01 19:14:23 C 05 27 23.35 +42 08 22.9 X L04
2026-01-01 19:18:15 C 05 27 22.84 +42 08 23.0 X L04
2026-01-04 20:36:48 C 05 17 44.244 +42 05 35.95 Z C23
2026-01-04 20:48:04 C 05 17 42.763 +42 05 34.69 Z C23
2026-01-04 21:08:11 C 05 17 40.075 +42 05 32.93 Z C23
2026-01-09 10:45:35 C 05 03 22.219 +41 51 37.73 V T08
2026-01-09 10:51:31 C 05 03 21.432 +41 51 36.50 V T08
2026-01-09 11:05:21 C 05 03 19.634 +41 51 33.80 V T08
2026-01-10 03:48:09 B 05 01 11.722 +41 48 25.56 Z V55
2026-01-10 03:50:11 B 05 01 11.465 +41 48 25.06 Z V55
2026-01-10 03:52:12 B 05 01 11.191 +41 48 24.70 Z V55
2026-01-10 17:53:16 B 04 59 24.416 +41 45 32.21 V 160
2026-01-10 17:55:09 B 04 59 24.168 +41 45 31.80 V 160
2026-01-10 17:57:02 B 04 59 23.925 +41 45 31.46 V 160
2026-01-11 01:20:19 B 04 58 27.804 +41 43 59.41 Z V55
2026-01-11 01:21:50 B 04 58 27.610 +41 43 59.16 Z V55
2026-01-11 01:22:51 B 04 58 27.480 +41 43 58.87 Z V55
2026-01-11 16:50:17 B 04 56 30.580 +41 40 30.97 V 160
2026-01-11 16:53:05 B 04 56 30.241 +41 40 30.57 V 160
2026-01-11 16:55:53 B 04 56 29.888 +41 40 29.97 V 160
2026-01-11 21:12:20 B 04 55 57.502 +41 39 34.74 X J51
2026-01-11 21:24:16 B 04 55 55.968 +41 39 32.04 X J51
2026-01-11 21:36:48 B 04 55 54.362 +41 39 29.23 X J51
2026-01-12 22:37:31 B 04 52 47.390 +41 33 24.84 X J51
2026-01-12 22:58:54 B 04 52 44.688 +41 33 19.62 X J51
2026-01-12 23:20:20 B 04 52 41.986 +41 33 13.75 X J51
2026-01-15 08:27:58 C 04 45 45.970 +41 17 26.27 V T08
2026-01-15 08:33:53 C 04 45 45.245 +41 17 24.47 V T08
2026-01-15 08:41:47 C 04 45 44.290 +41 17 22.09 V T08
2026-01-15 08:59:37 C 04 45 42.110 +41 17 16.62 V T08
2026-01-16 03:01:26 C 04 43 34.74 +41 11 41.3 V U55
2026-01-16 03:59:43 C 04 43 27.79 +41 11 22.7 V U55
2026-01-16 04:55:08 C 04 43 21.22 +41 11 06.2 V U55
2026-01-16 08:29:15 C 04 42 55.922 +41 10 02.68 V T05
2026-01-16 08:33:50 C 04 42 55.375 +41 10 01.24 V T05