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
2018-12-07 10:12:56 C 03 58 05.60 +30 42 44.3 U T05
2018-12-07 10:26:34 C 03 58 04.93 +30 42 42.1 U T05
2018-12-07 10:54:51 C 03 58 03.34 +30 42 38.5 U T05
2018-12-07 10:59:24 C 03 58 03.06 +30 42 37.6 U T05
2018-12-10 04:41:44 C 03 54 29.52 +30 33 05.1 V G96
2018-12-10 04:49:45 C 03 54 29.09 +30 33 03.9 V G96
2018-12-10 04:57:46 C 03 54 28.66 +30 33 02.7 V G96
2018-12-10 05:05:47 C 03 54 28.21 +30 33 01.6 V G96
2018-12-12 09:50:36 C 03 51 40.125 +30 24 54.37 U F51
2018-12-12 10:08:23 C 03 51 39.171 +30 24 51.54 U F51
2018-12-12 10:26:05 C 03 51 38.227 +30 24 48.77 U F51
2018-12-13 05:20:17 C 03 50 39.06 +30 21 47.6 U I41
2018-12-13 06:27:20 C 03 50 35.52 +30 21 37.0 U I41
2018-12-15 05:28:34 C 03 48 10.45 +30 13 56.5 V 703
2018-12-15 05:33:47 C 03 48 10.18 +30 13 55.5 V 703
2018-12-15 05:38:59 C 03 48 09.93 +30 13 54.1 V 703
2018-12-15 05:44:10 C 03 48 09.67 +30 13 52.8 V 703
2018-12-27 08:30:57 C 03 34 45.13 +29 22 27.2 V T05
2018-12-27 08:45:45 C 03 34 44.55 +29 22 24.0 V T05
2018-12-27 08:56:34 C 03 34 44.04 +29 22 22.4 V T05
2018-12-27 09:09:09 C 03 34 43.53 +29 22 20.2 V T05
2018-12-27 09:09:49 C 03 34 43.49 +29 22 20.4 V T05
2018-12-27 09:12:05 C 03 34 43.45 +29 22 19.6 V T05
2018-12-27 09:15:23 C 03 34 43.28 +29 22 19.1 V T05
2018-12-27 09:16:03 C 03 34 43.25 +29 22 19.1 V T05
2019-01-04 08:32:35 C 03 27 41.64 +28 47 37.3 V T05
2019-01-04 08:49:32 C 03 27 41.07 +28 47 33.8 V T05
2019-01-04 09:18:32 C 03 27 40.12 +28 47 28.9 V T05
2019-01-04 09:24:34 C 03 27 39.87 +28 47 27.7 V T05
2019-01-05 04:59:26 C 03 27 02.31 +28 43 59.3 V 703
2019-01-05 05:06:58 C 03 27 02.10 +28 43 57.7 V 703
2019-01-05 05:14:31 C 03 27 01.83 +28 43 56.7 V 703
2019-01-05 05:22:03 C 03 27 01.59 +28 43 55.2 V 703
2019-01-07 05:14:15 C 03 25 34.096 +28 35 33.12 U F51
2019-01-07 05:15:12 C 03 25 34.072 +28 35 32.95 U F51
2019-01-07 05:27:19 C 03 25 33.703 +28 35 30.90 U F51
2019-01-07 05:28:14 C 03 25 33.677 +28 35 30.73 U F51
2019-01-07 05:40:27 C 03 25 33.305 +28 35 28.63 U F51
2019-01-07 05:41:22 C 03 25 33.278 +28 35 28.50 U F51
2019-01-07 05:54:37 C 03 25 32.872 +28 35 26.20 U F51
2019-01-08 08:28:24 C 03 24 46.88 +28 30 52.7 V T05
2019-01-08 08:37:05 C 03 24 46.62 +28 30 50.5 V T05
2019-01-08 08:41:08 C 03 24 46.50 +28 30 49.6 V T05
2019-01-08 08:46:12 C 03 24 46.37 +28 30 48.2 V T05
2019-01-08 08:48:12 C 03 24 46.30 +28 30 48.9 V T05
2019-01-08 09:10:06 C 03 24 45.70 +28 30 44.0 V T05
2019-01-08 09:11:26 C 03 24 45.58 +28 30 44.7 V T05
2019-01-08 09:15:25 C 03 24 45.48 +28 30 43.6 V T05
2019-01-12 07:53:44 C 03 22 18.36 +28 14 57.9 V T05
2019-01-12 08:06:05 C 03 22 18.07 +28 14 55.8 V T05