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
2003-12-20 10:16:35 C 14 07 27.41 +02 53 42.3 16.3 d H72
2003-12-20 10:17:52 C 14 07 27.88 +02 53 39.1 16.1 d H72
2003-12-20 10:19:09 C 14 07 28.31 +02 53 35.9 16.2 d H72
2003-12-20 10:20:25 C 14 07 28.71 +02 53 32.4 16.2 d H72
2004-08-11 18:40:21 C 03 24 33.96 +19 25 50.7 r E12
2004-08-11 18:56:32 C 03 24 34.11 +19 25 52.6 r E12
2004-08-11 19:12:42 C 03 24 34.32 +19 25 54.6 r E12
2004-08-11 19:28:54 C 03 24 34.41 +19 25 56.7 r E12
2004-09-09 08:18:03 C 03 21 10.30 +20 07 04.3 19.2 c 704
2004-09-09 08:34:21 C 03 21 09.88 +20 07 04.2 19.3 c 704
2004-09-09 08:50:38 C 03 21 09.58 +20 07 04.9 19.1 c 704
2004-09-09 09:06:55 C 03 21 09.19 +20 07 05.1 19.2 c 704
2004-09-09 09:23:26 C 03 21 08.81 +20 07 05.3 19.2 c 704
2004-09-13 08:15:31 C 03 18 53.02 +20 06 44.7 18.4 c 704
2004-09-13 08:31:57 C 03 18 52.59 +20 06 44.4 18.7 c 704
2004-09-13 08:48:22 C 03 18 52.13 +20 06 44.6 19.3 c 704
2004-09-13 09:04:47 C 03 18 51.70 +20 06 44.1 18.7 c 704
2004-09-13 09:21:14 C 03 18 51.24 +20 06 44.0 18.8 c 704
2004-09-17 09:14:16 C 03 16 05.97 +20 04 36.7 19.0 c 704
2004-09-17 09:31:19 C 03 16 05.43 +20 04 36.3 19.2 c 704
2004-09-17 09:48:22 C 03 16 04.87 +20 04 35.4 19.2 c 704
2004-09-17 10:05:26 C 03 16 04.32 +20 04 35.2 19.1 c 704
2004-09-17 10:22:30 C 03 16 03.76 +20 04 35.0 19.0 c 704
2004-09-22 09:17:05 C 03 12 00.63 +19 59 19.1 o 699
2004-09-22 09:42:56 C 03 11 59.63 +19 59 17.8 o 699
2004-09-22 10:08:47 C 03 11 58.69 +19 59 16.0 o 699
2004-09-22 10:34:37 C 03 11 57.74 +19 59 15.5 o 699
2004-10-06 10:25:22 C 02 57 05.91 +19 27 54.8 c 691
2004-10-06 11:05:25 C 02 57 03.85 +19 27 49.6 c 691
2004-10-06 11:45:18 C 02 57 01.78 +19 27 44.3 c 691
2004-10-06 12:06:46 C 02 57 00.66 +19 27 41.5 18.1 c 644
2004-10-06 12:26:08 C 02 56 59.66 +19 27 38.8 18.1 c 644
2004-10-06 12:45:38 C 02 56 58.66 +19 27 36.2 18.1 c 644
2004-10-07 07:53:20 C 02 56 00.25 +19 25 03.4 o 699
2004-10-07 08:16:41 C 02 55 59.05 +19 25 00.8 o 699
2004-10-07 09:11:11 C 02 55 56.19 +19 24 53.6 o 699
2004-10-07 09:34:33 C 02 55 54.92 +19 24 50.5 o 699
2004-10-09 06:07:05 C 02 53 35.68 +19 18 35.3 18.7 c 704
2004-10-09 06:22:50 C 02 53 34.81 +19 18 33.7 18.6 c 704
2004-10-09 06:38:35 C 02 53 33.79 +19 18 31.3 19.0 c 704
2004-10-09 06:54:20 C 02 53 33.11 +19 18 29.0 18.8 c 704
2004-10-09 07:10:06 C 02 53 32.28 +19 18 26.9 18.4 c 704
2004-10-10 08:19:44 C 02 52 11.90 +19 14 43.5 c 691
2004-10-10 08:59:33 C 02 52 09.72 +19 14 37.5 c 691
2004-10-10 09:38:51 C 02 52 07.58 +19 14 31.7 c 691
2004-10-12 00:50:42 C 02 50 00.30 +19 08 25.5 o 084
2004-10-13 07:43:46 C 02 48 18.58 +19 03 27.4 c 691
2004-10-13 08:22:25 C 02 48 16.40 +19 03 21.0 c 691
2004-10-13 09:01:07 C 02 48 14.22 +19 03 14.6 c 691
2004-10-15 23:10:45 C 02 44 45.51 +18 52 34.0 o 084