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
2021-12-03 04:05:50 C 03 43 47.61 +29 02 54.9 V 703
2021-12-03 04:13:29 C 03 43 47.21 +29 02 53.8 V 703
2021-12-03 04:21:06 C 03 43 46.79 +29 02 52.8 V 703
2021-12-03 04:28:44 C 03 43 46.41 +29 02 51.9 V 703
2021-12-08 05:45:59 C 03 37 43.81 +28 44 14.9 V G96
2021-12-08 05:47:52 C 03 37 43.75 +28 44 14.3 V 703
2021-12-08 05:54:05 C 03 37 43.41 +28 44 13.6 V G96
2021-12-08 05:55:26 C 03 37 43.35 +28 44 13.0 V 703
2021-12-08 06:02:11 C 03 37 43.01 +28 44 12.3 V G96
2021-12-08 06:03:02 C 03 37 42.93 +28 44 12.0 V 703
2021-12-08 06:10:18 C 03 37 42.61 +28 44 10.9 V G96
2021-12-08 06:10:37 C 03 37 42.65 +28 44 10.9 V 703
2021-12-09 09:51:19 C 03 36 22.27 +28 39 42.7 V T08
2021-12-09 09:55:29 C 03 36 22.08 +28 39 43.9 V T08
2021-12-09 10:32:24 C 03 36 20.28 +28 39 35.1 V T08
2021-12-09 11:14:37 C 03 36 18.18 +28 39 30.3 V T08
2021-12-20 16:34:13 C 03 24 23.79 +27 53 20.6 V D29
2021-12-20 16:51:07 C 03 24 23.22 +27 53 17.9 V D29
2021-12-21 07:37:55 C 03 23 47.99 +27 50 42.5 V G96
2021-12-21 07:45:18 C 03 23 47.70 +27 50 41.5 V G96
2021-12-21 07:52:42 C 03 23 47.39 +27 50 40.0 V G96
2021-12-21 08:00:06 C 03 23 47.10 +27 50 38.7 V G96
2021-12-28 21:08:56 C 03 17 16.03 +27 19 08.2 19.3 q J43
2021-12-28 21:21:03 C 03 17 15.63 +27 19 06.2 19.0 q J43
2021-12-28 21:33:00 C 03 17 15.23 +27 19 04.0 19.1 q J43
2021-12-28 21:44:55 C 03 17 14.84 +27 19 02.0 19.2 q J43
2021-12-30 11:50:49 C 03 16 02.41 +27 12 35.2 V D29
2021-12-30 12:11:11 C 03 16 01.74 +27 12 31.4 V D29
2021-12-30 12:31:33 C 03 16 01.08 +27 12 28.0 V D29
2022-01-01 18:29:08 C 03 14 24.76 +27 03 28.8 V 130
2022-01-01 18:34:09 C 03 14 24.62 +27 03 28.3 V 130
2022-01-01 18:38:26 C 03 14 24.53 +27 03 27.3 V 130
2022-01-02 13:41:24 C 03 13 52.13 +27 00 21.2 V D29
2022-01-02 13:42:41 C 03 13 52.05 +27 00 20.8 V D29
2022-01-02 14:01:46 C 03 13 51.52 +27 00 17.4 V D29
2022-01-02 14:03:03 C 03 13 51.46 +27 00 17.4 V D29
2022-01-02 14:22:08 C 03 13 50.94 +27 00 14.1 V D29
2022-01-02 14:23:24 C 03 13 50.94 +27 00 14.0 V D29
2022-01-04 04:08:08 C 03 12 49.75 +26 54 08.8 V G96
2022-01-04 04:18:33 C 03 12 49.50 +26 54 07.5 V G96
2022-01-04 04:26:40 C 03 12 49.27 +26 54 06.4 V G96
2022-01-04 04:34:47 C 03 12 49.06 +26 54 05.1 V G96
2022-01-04 04:55:34 C 03 12 48.58 +26 54 00.7 V 703
2022-01-04 05:32:56 C 03 12 47.47 +26 53 54.9 V 703
2022-01-04 20:43:37 C 03 12 24.07 +26 51 30.9 19.3 q J43
2022-01-04 20:53:41 C 03 12 23.79 +26 51 30.5 19.6 q J43
2022-01-04 21:03:45 C 03 12 23.56 +26 51 28.6 19.5 q J43
2022-01-04 21:13:49 C 03 12 23.24 +26 51 27.2 19.3 q J43
2022-01-24 08:32:38 C 03 05 03.66 +25 51 04.3 V T05
2022-01-24 08:36:38 C 03 05 03.60 +25 51 03.7 V T05