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
2025-12-28 05:12:26 B 05 41 39.283 +42 02 45.24 W X04
2025-12-28 05:19:52 B 05 41 38.321 +42 02 46.25 W X04
2025-12-28 10:23:32 C 05 40 59.580 +42 03 20.77 V T08
2025-12-28 10:27:29 C 05 40 59.062 +42 03 21.13 V T08
2025-12-28 10:40:23 C 05 40 57.379 +42 03 22.36 V T08
2025-12-28 10:45:39 C 05 40 56.693 +42 03 22.86 V T08
2025-12-28 18:01:44 C 05 40 01.488 +42 03 58.10 Z C23
2025-12-28 18:02:52 C 05 40 01.334 +42 03 58.03 Z C23
2025-12-28 19:38:25 C 05 39 48.910 +42 04 06.78 Z C23
2025-12-30 19:20:46 C 05 33 39.065 +42 07 19.63 Z C23
2025-12-30 19:25:23 C 05 33 38.484 +42 07 20.35 Z C23
2025-12-30 19:54:40 C 05 33 34.654 +42 07 21.86 Z C23
2025-12-30 20:42:03 B 05 33 28.382 +42 07 24.13 V L65
2025-12-30 20:46:11 B 05 33 27.850 +42 07 24.38 V L65
2025-12-30 20:50:19 B 05 33 27.259 +42 07 24.96 V L65
2025-12-31 18:21:32 B 05 30 39.130 +42 08 05.68 q Y84
2025-12-31 18:29:10 B 05 30 38.117 +42 08 06.00 q Y84
2025-12-31 18:36:47 B 05 30 37.114 +42 08 06.29 q Y84
2025-12-31 18:46:07 B 05 30 35.880 +42 08 06.54 q Y84
2025-12-31 18:55:30 B 05 30 34.661 +42 08 06.94 q Y84
2025-12-31 19:03:05 B 05 30 33.653 +42 08 07.22 q Y84
2025-12-31 19:10:41 B 05 30 32.652 +42 08 07.44 q Y84
2025-12-31 19:19:46 B 05 30 31.452 +42 08 07.76 q Y84
2025-12-31 19:28:34 B 05 30 30.298 +42 08 08.05 q Y84
2025-12-31 19:35:36 B 05 30 29.362 +42 08 08.23 q Y84
2025-12-31 19:42:39 B 05 30 28.428 +42 08 08.52 q Y84
2025-12-31 19:51:30 B 05 30 27.250 +42 08 08.77 q Y84
2025-12-31 20:00:20 B 05 30 26.100 +42 08 08.99 q Y84
2025-12-31 20:07:23 B 05 30 25.169 +42 08 09.35 q Y84
2025-12-31 20:16:14 B 05 30 23.990 +42 08 09.56 q Y84
2025-12-31 20:25:13 B 05 30 22.786 +42 08 09.82 q Y84
2025-12-31 20:32:18 B 05 30 21.857 +42 08 10.00 q Y84
2025-12-31 20:39:19 B 05 30 20.928 +42 08 10.25 q Y84
2025-12-31 20:48:16 B 05 30 19.742 +42 08 10.57 q Y84
2025-12-31 20:57:12 B 05 30 18.564 +42 08 10.75 q Y84
2025-12-31 21:04:16 B 05 30 17.630 +42 08 10.97 q Y84
2025-12-31 21:11:19 B 05 30 16.697 +42 08 11.15 q Y84
2025-12-31 21:20:00 B 05 30 15.540 +42 08 11.40 q Y84
2025-12-31 21:28:39 B 05 30 14.381 +42 08 11.72 q Y84
2025-12-31 21:35:42 B 05 30 13.466 +42 08 11.87 q Y84
2025-12-31 21:42:45 B 05 30 12.530 +42 08 11.98 q Y84
2025-12-31 21:51:33 B 05 30 11.345 +42 08 12.19 q Y84
2025-12-31 22:00:21 B 05 30 10.178 +42 08 12.48 q Y84
2025-12-31 22:07:24 B 05 30 09.242 +42 08 12.62 q Y84
2025-12-31 22:14:26 B 05 30 08.314 +42 08 12.77 q Y84
2025-12-31 22:23:15 B 05 30 07.128 +42 08 12.91 q Y84
2025-12-31 22:32:03 B 05 30 05.964 +42 08 13.16 q Y84
2025-12-31 22:39:06 B 05 30 05.040 +42 08 13.27 q Y84
2025-12-31 22:47:54 B 05 30 03.864 +42 08 13.42 q Y84
2025-12-31 23:02:55 B 05 30 01.858 +42 08 13.63 q Y84