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
2017-10-19 10:01:50 C 03 12 37.21 +22 46 10.6 U 703
2017-10-19 10:09:19 C 03 12 36.83 +22 46 09.7 U 703
2017-10-19 10:19:25 C 03 12 36.36 +22 46 08.6 U 703
2017-10-19 10:27:02 C 03 12 36.00 +22 46 07.0 U 703
2017-10-19 11:28:55 C 03 12 33.17 +22 46 01.7 T08
2017-10-19 11:43:28 C 03 12 32.43 +22 45 59.7 T08
2017-10-19 11:46:47 C 03 12 32.29 +22 45 59.2 T08
2017-10-19 12:09:28 C 03 12 31.20 +22 45 56.3 T08
2017-10-20 09:12:19 C 03 11 30.85 +22 43 30.0 U G96
2017-10-20 09:22:41 C 03 11 30.33 +22 43 28.8 U G96
2017-10-20 09:33:02 C 03 11 29.83 +22 43 27.7 U G96
2017-10-20 09:43:29 C 03 11 29.32 +22 43 26.6 U G96
2017-10-21 08:03:33 C 03 10 24.77 +22 40 45.9 U G96
2017-10-21 08:11:03 C 03 10 24.39 +22 40 44.9 U G96
2017-10-21 08:18:30 C 03 10 24.04 +22 40 44.0 U G96
2017-10-21 08:25:56 C 03 10 23.66 +22 40 43.2 U G96
2017-10-23 11:28:22 C 03 07 53.76 +22 34 16.2 T08
2017-10-23 11:46:28 C 03 07 52.86 +22 34 14.3 T08
2017-10-23 12:07:21 C 03 07 51.83 +22 34 11.5 T08
2017-10-23 12:17:34 C 03 07 51.27 +22 34 10.2 T08
2017-10-24 07:55:43 C 03 06 52.98 +22 31 32.4 U 703
2017-10-24 08:03:45 C 03 06 52.57 +22 31 31.0 U 703
2017-10-24 08:11:45 C 03 06 52.18 +22 31 30.2 U 703
2017-10-24 08:19:49 C 03 06 51.75 +22 31 29.7 U 703
2017-10-24 08:21:54 C 03 06 51.68 +22 31 29.1 U 703
2017-10-24 08:30:11 C 03 06 51.27 +22 31 28.1 U 703
2017-10-24 08:38:21 C 03 06 50.85 +22 31 27.1 U 703
2017-10-24 08:46:27 C 03 06 50.40 +22 31 25.3 U 703
2017-10-27 07:17:58 C 03 03 18.10 +22 21 28.2 U 703
2017-10-27 07:25:37 C 03 03 17.71 +22 21 28.1 U 703
2017-10-27 07:33:16 C 03 03 17.24 +22 21 27.5 U 703
2017-10-27 07:47:08 C 03 03 16.52 +22 21 25.2 U G96
2017-10-27 07:49:31 C 03 03 16.35 +22 21 25.1 U 703
2017-10-27 07:59:59 C 03 03 15.86 +22 21 23.3 U G96
2017-10-27 08:10:20 C 03 03 15.33 +22 21 21.8 U G96
2017-10-27 08:18:13 C 03 03 14.91 +22 21 20.6 U G96
2017-10-27 11:02:55 C 03 03 06.56 +22 20 56.9 T08
2017-10-27 11:14:28 C 03 03 06.01 +22 20 55.2 T08
2017-10-27 11:24:25 C 03 03 05.49 +22 20 53.2 T08
2017-10-27 11:42:46 C 03 03 04.53 +22 20 50.9 T08
2017-10-27 16:23:48 C 03 02 50.33 +22 20 09.6 q D29
2017-10-27 16:36:31 C 03 02 49.68 +22 20 07.0 q D29
2017-10-27 16:49:15 C 03 02 49.02 +22 20 05.0 q D29
2017-10-29 16:26:00 C 03 00 23.51 +22 12 50.6 q D29
2017-10-29 16:38:44 C 03 00 22.82 +22 12 48.4 q D29
2017-10-29 16:51:28 C 03 00 22.17 +22 12 46.4 q D29
2017-10-30 06:28:58 C 02 59 40.44 +22 10 38.7 U 703
2017-10-30 06:38:05 C 02 59 39.97 +22 10 36.6 U 703
2017-10-30 06:45:56 C 02 59 39.56 +22 10 35.8 U 703
2017-10-30 06:53:47 C 02 59 39.17 +22 10 34.5 U 703