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
2002-12-14 06:38:31 C 03 40 46.34 +29 23 12.5 18.7 c 704
2002-12-28 02:46:33 C 03 26 36.22 +28 25 23.2 c 699
2002-12-28 03:08:23 C 03 26 35.45 +28 25 18.8 c 699
2002-12-28 03:30:06 C 03 26 34.67 +28 25 15.9 c 699
2002-12-28 03:51:57 C 03 26 33.79 +28 25 11.8 c 699
2003-01-04 04:22:56 C 03 20 59.86 +27 56 07.2 19.2 c 704
2003-01-04 04:47:06 C 03 20 59.15 +27 56 03.0 19.4 c 704
2003-01-04 05:10:49 C 03 20 58.41 +27 55 58.4 19.2 c 704
2003-01-20 03:37:51 C 03 12 57.69 +26 59 22.8 19.5 c 644
2003-01-20 04:07:57 C 03 12 57.31 +26 59 19.1 19.4 c 644
2003-01-20 04:37:58 C 03 12 56.91 +26 59 15.2 19.9 c 644
2003-01-28 02:28:19 C 03 11 19.60 +26 38 21.8 19.2 c 644
2003-01-28 02:59:14 C 03 11 19.44 +26 38 19.1 19.1 c 644
2003-01-28 03:30:13 C 03 11 19.27 +26 38 16.0 19.6 c 644
2003-09-30 10:33:04 C 08 25 33.59 +29 16 05.5 18.2 c 704
2003-09-30 10:51:36 C 08 25 35.30 +29 16 03.0 18.4 c 704
2003-09-30 11:10:33 C 08 25 37.02 +29 16 00.3 18.2 c 704
2003-09-30 11:28:52 C 08 25 38.68 +29 15 57.4 18.4 c 704
2003-10-05 11:01:54 C 08 36 55.12 +28 57 57.4 18.0 c 704
2003-10-05 11:22:01 C 08 36 57.03 +28 57 54.7 18.3 c 704
2003-10-05 11:42:13 C 08 36 58.96 +28 57 50.9 18.0 c 704
2003-10-22 10:18:33 C 09 19 10.45 +27 34 44.8 17.3 c 704
2003-10-22 10:35:21 C 09 19 12.34 +27 34 40.9 17.5 c 704
2003-10-22 10:51:49 C 09 19 14.16 +27 34 36.8 17.5 c 704
2003-10-22 11:08:20 C 09 19 16.01 +27 34 32.6 17.4 c 704
2003-10-22 11:24:44 C 09 19 17.87 +27 34 28.6 17.6 c 704
2003-11-01 05:22:01 C 09 47 28.05 +26 23 50.7 r 170
2003-11-01 05:23:39 C 09 47 28.25 +26 23 50.1 r 170
2003-11-02 10:43:58 C 09 51 16.92 +26 13 15.6 17.4 c 704
2003-11-02 11:01:26 C 09 51 19.21 +26 13 09.4 17.5 c 704
2003-11-02 11:18:55 C 09 51 21.47 +26 13 03.1 17.0 c 704
2003-11-02 11:36:29 C 09 51 23.75 +26 12 56.7 17.2 c 704
2003-11-02 11:54:04 C 09 51 26.08 +26 12 50.4 17.1 c 704
2003-11-06 19:49:03 C 10 05 32.59 +25 31 18.2 m 379
2003-11-06 19:52:13 C 10 05 32.99 +25 31 16.5 m 379
2003-11-08 04:14:47 C 10 10 09.31 +25 16 51.4 o 084
2003-11-22 19:35:31 C 11 08 39.55 +21 36 12.3 m 379
2003-11-22 19:41:50 C 11 08 40.69 +21 36 08.1 m 379
2003-11-27 09:35:57 C 11 31 07.28 +19 51 21.5 15.9 d H72
2003-11-27 09:37:48 C 11 31 07.65 +19 51 19.7 13.5 d H72
2003-11-27 09:39:44 C 11 31 08.10 +19 51 17.5 15.6 d H72
2003-11-27 09:41:36 C 11 31 08.45 +19 51 15.7 15.9 d H72
2003-12-01 11:03:23 C 11 53 09.45 +17 57 08.7 16.0 c 704
2003-12-01 11:20:17 C 11 53 13.44 +17 56 47.2 16.2 c 704
2003-12-01 11:37:23 C 11 53 17.46 +17 56 25.1 16.1 c 704
2003-12-01 11:53:13 C 11 53 21.20 +17 56 04.9 16.0 c 704
2003-12-01 12:12:00 C 11 53 25.62 +17 55 40.6 16.2 c 704
2003-12-19 09:04:02 C 13 58 43.61 +03 59 59.7 17.2 d H72
2003-12-19 09:05:19 C 13 58 44.03 +03 59 57.5 16.4 d H72
2003-12-19 09:06:35 C 13 58 44.48 +03 59 54.6 16.7 d H72