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
2011-11-15 09:14:56 C 03 16 48.28 +25 05 04.8 r 703
2011-11-16 07:06:24 C 03 15 45.076 +25 01 50.33 L F51
2011-11-16 07:22:57 C 03 15 44.265 +25 01 47.90 L F51
2011-11-17 09:06:10 C 03 14 29.52 +24 57 54.6 18.8 c 704
2011-11-17 09:24:11 C 03 14 28.66 +24 57 51.4 19.1 c 704
2011-11-17 09:42:42 C 03 14 27.78 +24 57 49.0 19.3 c 704
2011-11-17 10:00:45 C 03 14 26.83 +24 57 44.9 19.5 c 704
2011-11-17 10:18:52 C 03 14 25.95 +24 57 43.3 19.4 c 704
2011-11-23 05:02:50 C 03 07 50.59 +24 35 31.9 r 703
2011-11-23 05:14:59 C 03 07 50.01 +24 35 29.4 r 703
2011-11-23 05:27:09 C 03 07 49.51 +24 35 28.3 r 703
2011-11-28 05:09:43 C 03 02 21.48 +24 15 04.5 r G96
2011-11-28 05:23:47 C 03 02 20.83 +24 15 01.8 r G96
2011-11-28 05:37:58 C 03 02 20.18 +24 14 59.6 r G96
2011-12-25 04:27:01 C 02 39 39.38 +22 26 35.7 r 703
2011-12-25 04:39:13 C 02 39 39.13 +22 26 34.3 r 703
2011-12-25 04:51:35 C 02 39 38.80 +22 26 32.8 r 703
2011-12-25 05:03:54 C 02 39 38.48 +22 26 31.4 r 703
2011-12-27 18:56:56 C 02 38 14.55 +22 17 51.3 19.7 u A14
2011-12-27 19:07:40 C 02 38 14.30 +22 17 49.8 19.7 u A14
2011-12-27 19:18:25 C 02 38 14.07 +22 17 48.4 19.7 u A14
2011-12-28 18:58:37 C 02 37 44.25 +22 14 38.1 19.6 u A14
2011-12-28 19:09:41 C 02 37 44.01 +22 14 36.4 19.7 u A14
2011-12-28 19:20:26 C 02 37 43.79 +22 14 35.1 19.7 u A14
2012-09-18 10:22:05 C 05 44 14.89 +31 30 24.1 18.9 c 704
2012-09-18 10:42:43 C 05 44 15.21 +31 30 26.6 19.6 c 704
2012-09-18 11:03:20 C 05 44 15.59 +31 30 28.7 19.9 c 704
2012-09-18 11:23:56 C 05 44 15.84 +31 30 31.4 19.6 c 704
2012-10-18 13:13:02 c 05 46 09.071 +33 13 54.38 L F51
2012-10-18 13:31:02 c 05 46 08.806 +33 13 57.24 L F51
2012-10-21 02:33:25 C 05 45 12.79 +33 23 30.2 c A24
2012-10-21 02:35:30 C 05 45 12.71 +33 23 30.5 c A24
2012-10-21 02:58:06 C 05 45 12.31 +33 23 33.9 c A24
2012-10-21 03:21:56 C 05 45 11.89 +33 23 37.5 c A24
2012-10-21 03:27:17 C 05 45 11.80 +33 23 38.6 c A24
2012-10-21 03:43:51 C 05 45 11.57 +33 23 42.0 c A24
2012-10-27 14:54:15 c 05 41 53.616 +33 48 01.10 L F51
2012-10-27 15:11:14 c 05 41 53.170 +33 48 03.67 L F51
2012-11-07 02:37:34 C 05 33 36.08 +34 25 33.6 c A24
2012-11-07 02:39:39 C 05 33 36.01 +34 25 33.7 c A24
2012-11-07 11:24:58 c 05 33 14.768 +34 26 48.00 L F51
2012-11-07 11:43:00 c 05 33 14.006 +34 26 50.54 L F51
2012-11-08 02:39:37 C 05 32 36.76 +34 28 53.0 c A24
2012-11-08 02:40:39 C 05 32 36.75 +34 28 53.1 c A24
2012-11-08 02:41:41 C 05 32 36.69 +34 28 53.4 c A24
2012-11-08 02:42:44 C 05 32 36.66 +34 28 53.7 c A24
2012-11-08 03:45:50 C 05 32 33.94 +34 29 01.8 c A24
2012-11-08 03:46:52 C 05 32 33.88 +34 29 02.1 c A24
2012-11-08 03:47:54 C 05 32 33.88 +34 29 02.1 c A24
2012-11-08 03:48:56 C 05 32 33.83 +34 29 02.5 c A24