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
1996-11-05 02:11:13 C 05 26 08.96 +34 00 24.1 z 118
1996-11-17 22:37:36 C 05 11 30.60 +34 31 33.0 z 046
1996-11-17 22:39:59 C 05 11 30.47 +34 31 33.3 z 046
1996-11-17 22:42:25 C 05 11 30.32 +34 31 33.4 z 046
1996-12-01 23:08:58 C 04 50 42.65 +34 41 01.3 z 118
1996-12-01 23:20:44 C 04 50 41.87 +34 41 01.2 z 118
1996-12-04 04:56:25 C 04 47 05.31 +34 39 28.3 i 711
1996-12-04 05:08:32 C 04 47 04.47 +34 39 27.9 i 711
1996-12-06 15:49:01 C 04 43 04.06 +34 36 41.4 381
1996-12-06 15:52:35 C 04 43 03.82 +34 36 41.3 381
1996-12-07 17:40:05 C 04 41 17.55 +34 35 06.9 381
1996-12-07 17:44:15 C 04 41 17.25 +34 35 06.7 381
1996-12-07 17:49:36 C 04 41 16.88 +34 35 06.3 381
1996-12-08 10:57:32 C 04 40 06.58 +34 33 57.0 381
1996-12-08 11:00:59 C 04 40 06.35 +34 33 56.9 381
1996-12-18 07:37:59 C 04 23 58.10 +34 08 45.4 c 608
1996-12-18 08:50:45 C 04 23 53.15 +34 08 35.3 c 608
1996-12-29 21:23:31 C 04 06 40.31 +33 21 01.7 z 046
1996-12-29 21:26:14 C 04 06 40.15 +33 21 01.0 z 046
1996-12-29 21:31:37 C 04 06 39.86 +33 20 59.5 z 046
1996-12-30 21:18:56 C 04 05 19.39 +33 16 16.5 z 118
1996-12-30 21:32:06 C 04 05 18.63 +33 16 13.7 z 118
1997-01-14 19:17:18 C 03 48 44.32 +32 00 38.9 z 118
1997-01-14 19:42:14 C 03 48 43.44 +32 00 34.0 z 118
1997-01-30 09:13:39 C 03 39 26.87 +30 48 19.9 c 608
1997-01-30 09:31:29 C 03 39 26.61 +30 48 17.3 c 608
1997-02-05 07:47:42 C 03 38 03.47 +30 25 55.6 c 608
1997-02-05 08:41:54 C 03 38 03.12 +30 25 47.4 c 608
1997-02-06 07:44:13 C 03 37 56.15 +30 22 30.2 c 608
1997-02-06 08:41:20 C 03 37 55.87 +30 22 21.9 c 608
1997-02-07 07:23:26 C 03 37 50.76 +30 19 14.0 c 608
1997-02-07 08:45:39 C 03 37 50.46 +30 19 02.5 c 608
1997-10-21 11:16:51 C 18 37 39.73 -34 18 25.1 z 422
1997-10-21 11:17:52 C 18 37 40.26 -34 18 24.2 z 422
1997-10-21 11:18:53 C 18 37 40.68 -34 18 23.1 z 422
1997-10-21 11:21:28 C 18 37 41.92 -34 18 21.3 z 422
1997-11-07 09:43:03 C 20 54 30.46 -25 28 49.1 z 381
1997-11-07 09:50:22 C 20 54 32.11 -25 28 38.9 z 381
1997-11-09 08:46:56 C 21 04 53.97 -24 23 10.2 z 381
1997-11-09 08:48:58 C 21 04 54.39 -24 23 07.5 z 381
1997-11-12 10:46:18 C 21 19 40.99 -22 43 43.0 z 422
1997-11-12 10:47:58 C 21 19 41.27 -22 43 40.9 z 422
1997-11-12 10:49:38 C 21 19 41.59 -22 43 38.8 z 422
1998-01-17 16:50:13 C 23 55 04.70 -01 45 12.6 046
1998-01-17 16:55:30 C 23 55 05.05 -01 45 09.1 046
1998-01-17 17:01:38 C 23 55 05.43 -01 45 05.7 046
1998-01-17 17:03:26 C 23 55 05.52 -01 45 05.6 046
1998-09-18 11:53:33 C 03 46 12.07 +24 03 19.2 711
1998-09-20 11:00:14 C 03 45 20.20 +24 04 34.3 711
1998-09-20 11:19:09 C 03 45 19.88 +24 04 34.7 711