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
2021-11-11 11:29:47 C 04 10 35.29 +29 55 54.3 V T08
2021-11-11 11:45:02 C 04 10 34.58 +29 55 53.8 V T08
2021-11-11 16:12:56 C 04 10 21.530 +29 55 41.30 V P07
2021-11-11 17:15:14 C 04 10 18.326 +29 55 38.53 V P07
2021-11-11 18:19:45 C 04 10 15.125 +29 55 34.90 V P07
2021-11-11 19:12:01 C 04 10 12.482 +29 55 31.55 V P07
2021-11-13 13:41:32 C 04 08 06.15 +29 53 00.4 V D29
2021-11-13 14:01:54 C 04 08 05.12 +29 52 59.5 V D29
2021-11-13 14:22:16 C 04 08 04.09 +29 52 58.0 V D29
2021-11-15 06:50:32 C 04 06 01.69 +29 50 17.1 V G96
2021-11-15 06:58:43 C 04 06 01.26 +29 50 16.3 V G96
2021-11-15 07:06:53 C 04 06 00.83 +29 50 15.7 V G96
2021-11-15 07:15:05 C 04 06 00.40 +29 50 15.3 V G96
2021-11-16 04:58:24 C 04 04 54.25 +29 48 40.1 V 703
2021-11-16 05:08:23 C 04 04 53.74 +29 48 37.8 V 703
2021-11-16 05:18:21 C 04 04 53.17 +29 48 37.3 V 703
2021-11-16 05:28:19 C 04 04 52.69 +29 48 37.4 V 703
2021-11-23 11:04:41 C 03 55 52.81 +29 32 43.1 V T08
2021-11-23 11:12:41 C 03 55 52.44 +29 32 42.4 V T08
2021-11-23 11:32:36 C 03 55 51.25 +29 32 39.2 V T08
2021-11-23 12:43:24 C 03 55 47.63 +29 32 32.3 V T08
2021-11-23 12:44:44 C 03 55 47.53 +29 32 31.9 V T08
2021-11-23 12:44:57 C 03 55 47.51 +29 32 32.3 V T05
2021-11-23 12:46:16 C 03 55 47.49 +29 32 32.6 V T05
2021-11-23 12:46:56 C 03 55 47.37 +29 32 32.2 V T05
2021-11-23 12:47:35 C 03 55 47.36 +29 32 32.6 V T05
2021-11-26 07:46:34 C 03 52 17.424 +29 24 52.54 U F51
2021-11-26 07:51:32 C 03 52 17.153 +29 24 52.03 U F51
2021-11-26 08:06:57 C 03 52 16.341 +29 24 50.16 U F51
2021-11-26 08:11:53 C 03 52 16.073 +29 24 49.64 U F51
2021-11-26 08:24:52 C 03 52 15.394 +29 24 48.19 U F51
2021-11-26 08:29:46 C 03 52 15.120 +29 24 47.52 U F51
2021-11-26 08:46:47 C 03 52 14.228 +29 24 45.56 U F51
2021-11-26 08:51:41 C 03 52 13.957 +29 24 44.92 U F51
2021-11-27 06:30:08 C 03 51 06.16 +29 22 05.6 V 703
2021-11-27 06:38:42 C 03 51 05.64 +29 22 04.6 V 703
2021-11-27 06:47:26 C 03 51 05.26 +29 22 03.3 V 703
2021-11-27 06:56:15 C 03 51 04.71 +29 22 02.3 V 703
2021-11-27 10:57:29 C 03 50 52.08 +29 21 32.4 V T08
2021-11-27 11:02:49 C 03 50 51.80 +29 21 32.6 V T08
2021-11-27 11:17:20 C 03 50 50.99 +29 21 31.7 V T08
2021-11-27 11:25:06 C 03 50 50.64 +29 21 30.0 V T08
2021-11-28 05:53:10 C 03 49 53.04 +29 19 08.4 V G96
2021-11-28 06:00:38 C 03 49 52.64 +29 19 07.4 V G96
2021-11-28 06:08:07 C 03 49 52.24 +29 19 06.5 V G96
2021-11-28 06:15:37 C 03 49 51.86 +29 19 05.6 V G96
2021-11-30 05:13:24 C 03 47 25.77 +29 12 53.5 V 703
2021-11-30 05:20:58 C 03 47 25.30 +29 12 53.2 V 703
2021-11-30 05:28:33 C 03 47 24.93 +29 12 52.1 V 703
2021-11-30 05:36:06 C 03 47 24.51 +29 12 50.9 V 703