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
1994-09-16 00:24:46 C 02 32 12.21 +04 41 15.9 z 557
1994-09-18 16:46:05 C 02 21 31.54 +04 13 32.0 413
1994-09-18 16:49:08 C 02 21 31.04 +04 13 30.7 413
1994-09-28 21:11:47 C 01 42 41.12 +02 29 12.3 z 540
1994-09-28 21:13:21 C 01 42 40.88 +02 29 11.7 z 540
1994-09-28 21:16:24 C 01 42 40.42 +02 29 10.3 z 540
1994-09-30 00:09:57 C 01 38 41.13 +02 18 33.4 046
1994-09-30 00:13:32 C 01 38 40.60 +02 18 31.9 046
1994-09-30 00:15:00 C 01 38 40.38 +02 18 31.4 046
1994-10-01 04:12:49 C 01 34 37.32 +02 07 46.1 z 801
1994-10-01 04:21:14 C 01 34 36.08 +02 07 42.9 z 801
1994-10-04 09:11:47 C 01 23 55.70 +01 39 43.2 z 658
1994-10-04 09:14:04 C 01 23 55.40 +01 39 42.4 z 658
1994-10-04 09:17:03 C 01 23 54.98 +01 39 41.2 z 658
1994-10-04 23:32:41 C 01 22 01.11 +01 34 47.3 046
1994-10-04 23:34:40 C 01 22 00.85 +01 34 46.6 046
1994-10-04 23:36:29 C 01 22 00.60 +01 34 46.1 046
1994-10-07 05:14:41 C 01 15 06.55 +01 17 11.8 z 801
1994-10-07 05:27:12 C 01 15 04.94 +01 17 07.8 z 801
1994-10-08 22:43:35 C 01 10 02.66 +01 04 32.2 z 540
1994-10-08 22:45:37 C 01 10 02.43 +01 04 31.4 z 540
1994-10-08 22:47:35 C 01 10 02.20 +01 04 31.0 z 540
1994-10-10 22:11:27 C 01 04 32.68 +00 51 09.5 z 557
1994-10-10 22:26:00 C 01 04 31.01 +00 51 05.5 z 557
1994-10-11 00:20:32 C 01 04 17.91 +00 50 34.8 z 557
1994-10-11 01:00:03 C 01 04 13.40 +00 50 24.3 z 557
1994-10-11 20:43:12 C 01 02 02.90 +00 45 13.2 z 557
1994-10-11 21:26:19 C 01 01 58.11 +00 45 02.3 z 557
1994-10-24 11:30:12 A 00 35 21.57 -00 09 05.0 413
1994-10-24 12:22:35 A 00 35 18.04 -00 09 10.5 413
1994-11-08 01:38:14 C 00 18 31.18 -00 20 37.5 z 801
1994-11-08 02:00:36 C 00 18 30.47 -00 20 36.5 z 801
1995-10-29 14:57:05 C 03 30 52.78 +25 21 01.1 413
1995-10-29 15:02:26 C 03 30 52.54 +25 21 00.6 413
1995-10-30 15:47:16 C 03 29 44.21 +25 18 38.7 413
1995-10-30 15:54:38 C 03 29 43.83 +25 18 38.2 413
1995-10-31 14:09:36 C 03 28 42.16 +25 16 24.2 413
1995-10-31 14:15:31 C 03 28 41.87 +25 16 23.7 413
1995-11-16 14:45:29 C 03 10 13.27 +24 25 53.4 z 360
1995-11-16 14:53:00 C 03 10 12.90 +24 25 52.5 z 360
1995-11-18 14:12:59 C 03 07 56.86 +24 18 19.9 z 360
1995-11-18 14:21:29 C 03 07 56.50 +24 18 18.4 z 360
1995-11-24 09:24:08 c 03 01 26.10 +23 54 59.2 i 691
1995-11-24 09:56:18 c 03 01 24.61 +23 54 53.7 i 691
1995-11-24 10:28:31 c 03 01 23.12 +23 54 48.0 i 691
1996-10-13 11:02:53 C 05 39 21.19 +32 44 14.4 i 711
1996-10-13 11:22:09 C 05 39 20.90 +32 44 17.4 i 711
1996-10-14 11:02:21 C 05 39 05.73 +32 47 43.8 i 711
1996-10-14 11:21:04 C 05 39 05.36 +32 47 46.6 i 711
1996-11-05 01:59:26 C 05 26 09.44 +34 00 22.9 z 118