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
1980-01-21 00:27:57 A 02 23 27.26 +20 11 23.4 A 801
1980-01-22 00:17:57 A 02 23 30.58 +20 10 46.5 A 801
1986-11-27 04:32:00 A 03 55 38.04 +29 47 30.5 688
1986-11-27 04:40:40 A 03 55 37.59 +29 47 29.7 688
1986-12-02 06:48:47 A 03 49 11.69 +29 32 03.0 B 691
1986-12-02 07:03:38 A 03 49 10.91 +29 32 00.4 B 691
1986-12-02 07:17:26 A 03 49 10.17 +29 31 59.1 B 691
1986-12-04 08:51:12 A 03 46 36.03 +29 25 02.0 B 691
1986-12-04 09:05:02 A 03 46 35.29 +29 24 59.6 B 691
1986-12-04 09:11:15 A 03 46 34.99 +29 24 58.6 B 691
1987-12-14 10:59:59 A 11 43 58.98 +26 27 56.2 675
1987-12-14 12:17:59 A 11 44 19.07 +26 27 01.3 675
1987-12-15 12:00:00 A 11 50 36.51 +26 09 24.3 675
1987-12-18 10:29:59 A 12 10 43.20 +25 06 30.5 A 801
1987-12-30 15:01:31 A 13 59 55.58 +16 20 43.2 568
1987-12-30 15:30:22 A 14 00 08.22 +16 19 24.1 568
1988-01-13 15:48:09 A 16 34 01.34 -02 58 39.6 568
1988-01-23 15:53:00 A 18 04 32.36 -14 06 11.1 568
1989-10-28 08:10:00 04 10 06.15 +28 50 06.2 261
1989-10-28 09:15:00 04 10 03.55 +28 50 04.7 261
1990-12-15 06:47:43 A 06 48 00.57 +42 29 19.2 801
1990-12-15 06:53:59 A 06 47 59.96 +42 29 22.4 801
1990-12-17 03:33:59 A 06 43 33.20 +42 52 44.7 801
1990-12-17 03:41:23 A 06 43 32.53 +42 52 49.6 801
1990-12-20 06:10:21 A 06 35 23.28 +43 30 23.4 801
1990-12-20 06:26:15 A 06 35 21.41 +43 30 31.1 801
1991-01-19 02:26:05 A 04 45 48.13 +44 56 39.6 801
1991-01-19 02:32:34 A 04 45 46.89 +44 56 37.0 801
1991-01-20 03:15:25 A 04 41 57.21 +44 47 32.5 801
1991-01-20 03:22:09 A 04 41 56.15 +44 47 29.9 801
1991-10-07 10:51:44 02 20 25.71 +13 51 23.4 675
1991-10-16 07:39:59 02 04 21.42 +12 52 50.0 261
1991-10-16 08:35:00 02 04 17.18 +12 52 34.2 261
1992-01-01 02:07:25 01 04 44.01 +08 59 03.1 711
1992-10-01 10:52:59 04 11 25.34 +27 13 15.8 261
1992-10-01 11:53:00 04 11 24.05 +27 13 18.7 261
1993-10-23 10:45:00 06 16 39.83 +34 14 18.8 261
1993-10-23 11:24:59 06 16 39.47 +34 14 27.8 261
1993-11-15 07:57:35 06 02 34.61 +36 13 34.3 711
1994-01-08 04:55:55 04 24 12.43 +36 38 08.6 711
1994-01-09 05:42:04 04 22 25.13 +36 32 03.9 711
1994-08-27 19:36:38 C 03 44 32.89 +07 30 52.2 413
1994-08-27 19:39:00 C 03 44 32.54 +07 30 51.5 413
1994-09-04 09:09:02 C 03 17 33.46 +06 33 02.8 z 801
1994-09-04 09:13:14 C 03 17 32.79 +06 33 01.4 z 801
1994-09-07 23:56:04 C 03 03 50.58 +06 00 49.4 z 557
1994-09-08 00:13:13 C 03 03 47.82 +06 00 43.0 z 557
1994-09-08 00:28:41 C 03 03 45.30 +06 00 37.0 z 557
1994-09-16 00:06:23 C 02 32 15.31 +04 41 23.8 z 557
1994-09-16 00:16:50 C 02 32 13.54 +04 41 19.3 z 557