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
2018-10-22 11:49:18 C 04 51 20.910 +31 14 16.58 U F52
2018-10-31 19:52:01 C 04 43 24.48 +31 26 12.4 q D29
2018-10-31 20:18:44 C 04 43 23.42 +31 26 13.5 q D29
2018-10-31 20:45:28 C 04 43 22.32 +31 26 14.2 q D29
2018-11-05 13:31:10 C 04 38 35.64 +31 29 25.4 U T05
2018-11-05 13:33:41 C 04 38 35.55 +31 29 24.7 U T05
2018-11-05 13:56:57 C 04 38 34.45 +31 29 25.6 U T05
2018-11-05 14:05:28 C 04 38 34.06 +31 29 25.8 U T05
2018-11-07 09:15:49 C 04 36 36.78 +31 30 01.6 V G96
2018-11-07 09:23:40 C 04 36 36.44 +31 30 01.6 V G96
2018-11-07 09:31:32 C 04 36 36.04 +31 30 01.9 V G96
2018-11-07 09:39:23 C 04 36 35.68 +31 30 01.9 V G96
2018-11-13 12:55:22 C 04 29 27.26 +31 29 22.9 U T05
2018-11-13 13:08:31 C 04 29 26.61 +31 29 22.7 U T05
2018-11-13 13:13:10 C 04 29 26.39 +31 29 22.0 U T05
2018-11-13 13:33:46 C 04 29 25.31 +31 29 22.2 U T05
2018-11-27 11:10:12 C 04 11 25.21 +31 10 42.6 U T08
2018-11-27 11:33:09 C 04 11 23.89 +31 10 39.6 U T08
2018-11-27 11:35:10 C 04 11 23.74 +31 10 39.3 U T08
2018-11-27 11:36:30 C 04 11 23.69 +31 10 38.7 U T08
2018-11-27 11:57:57 C 04 11 22.48 +31 10 36.4 U T08
2018-11-27 12:06:51 C 04 11 21.96 +31 10 36.6 U T08
2018-11-28 08:19:25 C 04 10 14.06 +31 08 40.5 V G96
2018-11-28 08:26:53 C 04 10 13.63 +31 08 39.7 V G96
2018-11-28 08:34:22 C 04 10 13.21 +31 08 39.0 V G96
2018-11-28 08:41:51 C 04 10 12.77 +31 08 38.3 V G96
2018-11-29 11:12:52 C 04 08 43.61 +31 05 59.9 U T05
2018-11-29 11:27:10 C 04 08 42.77 +31 05 58.3 U T05
2018-11-29 11:41:14 C 04 08 41.92 +31 05 56.9 U T05
2018-11-29 11:43:54 C 04 08 41.82 +31 05 56.8 U T05
2018-11-29 11:45:54 C 04 08 41.69 +31 05 56.9 U T05
2018-11-29 11:47:12 C 04 08 41.58 +31 05 56.4 U T05
2018-11-29 11:48:34 C 04 08 41.54 +31 05 55.9 U T05
2018-11-29 12:08:53 C 04 08 40.36 +31 05 54.1 U T05
2018-12-01 23:19:09 C 04 05 21.43 +30 59 25.5 V C95
2018-12-01 23:21:59 C 04 05 21.29 +30 59 25.2 V C95
2018-12-01 23:24:49 C 04 05 21.13 +30 59 25.0 V C95
2018-12-01 23:27:40 C 04 05 20.96 +30 59 24.7 V C95
2018-12-01 23:30:31 C 04 05 20.80 +30 59 24.2 V C95
2018-12-01 23:33:22 C 04 05 20.62 +30 59 23.7 V C95
2018-12-03 09:57:42 C 04 03 25.30 +30 55 20.8 U T05
2018-12-03 10:11:22 C 04 03 24.48 +30 55 19.0 U T05
2018-12-03 10:24:28 C 04 03 23.75 +30 55 16.6 U T05
2018-12-03 10:39:54 C 04 03 22.86 +30 55 15.2 U T05
2018-12-03 10:41:13 C 04 03 22.77 +30 55 15.0 U T05
2018-12-03 10:41:53 C 04 03 22.76 +30 55 15.1 U T05
2018-12-04 04:10:59 C 04 02 24.46 +30 53 04.0 V 703
2018-12-04 04:19:21 C 04 02 24.01 +30 53 03.4 V 703
2018-12-04 04:27:43 C 04 02 23.52 +30 53 02.3 V 703
2018-12-04 04:36:05 C 04 02 23.06 +30 53 01.2 V 703