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
1974-12-18 08:38:10 A 05 51 51.35 +41 43 12.3 675
1974-12-18 09:23:10 A 05 51 42.55 +41 43 27.9 675
1978-09-27 21:25:05 A 00 43 03.68 -17 27 32.0 12.5 095
1978-10-01 20:06:31 A 00 23 00.20 -15 46 46.8 095
1978-10-01 20:34:02 A 00 22 55.13 -15 46 19.8 095
1978-10-02 21:16:45 A 00 18 40.47 -15 22 35.8 095
1978-10-03 20:59:33 A 00 14 55.56 -15 00 42.8 095
1978-10-03 21:04:33 A 00 14 54.83 -15 00 39.5 095
1978-10-05 14:56:55 A 00 08 58.71 -14 24 05.1 330
1978-10-06 06:47:00 A 00 06 56.45 -14 10 52.6 675
1978-10-06 07:07:00 A 00 06 53.89 -14 10 40.6 675
1978-10-07 04:35:40 A 00 04 17.77 -13 52 59.4 805
1978-10-07 07:23:00 A 00 03 58.40 -13 51 08.8 688
1978-10-07 09:35:00 A 00 03 42.62 -13 49 20.5 675
1978-10-07 20:34:40 A 00 02 28.93 -13 40 49.6 095
1978-10-07 20:44:39 A 00 02 27.81 -13 40 42.1 095
1978-10-07 21:12:44 A 00 02 25.63 -13 40 24.6 12.5 046
1978-10-07 21:34:44 A 00 02 22.50 -13 40 02.8 046
1978-10-08 04:48:48 A 00 01 35.52 -13 34 33.9 A 801
1978-10-08 05:21:41 A 00 01 31.16 -13 33 42.1 805
1978-10-08 19:24:29 A 00 00 03.05 -13 23 26.3 095
1978-10-08 19:34:28 A 00 00 01.99 -13 23 19.6 095
1978-10-08 22:19:14 A 23 59 44.84 -13 21 13.9 12.8 046
1978-10-08 22:40:45 A 23 59 42.57 -13 20 57.4 046
1978-10-09 05:25:12 A 23 59 01.70 -13 15 39.1 805
1978-10-09 05:54:12 A 23 58 58.70 -13 15 17.4 805
1978-10-09 19:00:29 A 23 57 43.05 -13 06 02.5 14.5 056
1978-10-09 20:49:20 A 23 57 32.34 -13 04 45.7 14.0 095
1978-10-09 22:14:26 A 23 57 24.62 -13 03 46.5 13.0 046
1978-10-09 22:35:21 A 23 57 22.43 -13 03 30.9 046
1978-10-10 05:15:51 A 23 56 44.88 -12 58 39.0 A 801
1978-10-10 06:49:00 A 23 56 36.60 -12 57 33.3 675
1978-10-10 07:47:59 A 23 56 31.04 -12 56 56.3 688
1978-10-10 23:55:05 A 23 55 05.12 -12 45 37.1 14.0 046
1978-10-11 00:06:09 A 23 55 04.25 -12 45 29.6 046
1978-10-11 05:17:07 A 23 54 37.27 -12 41 52.0 A 801
1978-10-24 18:21:03 A 23 38 07.93 -09 36 09.5 16.5 095
1978-10-24 18:21:18 A 23 38 07.93 -09 36 08.9 095
1978-10-29 17:29:40 A 23 35 55.36 -08 40 45.2 095
1978-10-31 04:10:37 A 23 35 32.22 -08 25 25.6 A 801
1978-10-31 18:16:18 A 23 35 25.36 -08 19 17.6 046
1978-10-31 18:36:48 A 23 35 25.18 -08 19 08.5 046
1978-11-02 19:04:17 A 23 35 07.17 -07 58 20.8 095
1978-11-04 20:36:29 A 23 35 00.13 -07 37 36.5 095
1978-11-20 17:35:32 A 23 38 58.84 -05 09 26.3 18.0 095
1978-11-26 00:10:40 A 23 41 42.38 -04 22 58.7 A 801
1978-12-30 00:50:13 A 00 08 45.85 +00 27 24.8 A 801
1979-10-31 08:13:52 A 03 22 19.22 +24 35 03.7 A 801
1979-11-22 06:53:29 A 02 56 56.80 +23 16 11.5 675
1979-11-24 07:00:29 A 02 54 45.02 +23 07 40.4 675