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
2014-12-01 04:09:03 C 02 41 51.46 +22 03 40.7 q 703
2014-12-01 04:14:51 C 02 41 51.27 +22 03 39.1 q 703
2014-12-01 04:20:40 C 02 41 51.07 +22 03 39.0 q 703
2014-12-11 03:42:38 C 02 33 04.31 +21 20 40.1 q 703
2014-12-11 03:49:56 C 02 33 04.06 +21 20 39.0 q 703
2014-12-11 03:57:15 C 02 33 03.82 +21 20 38.0 q 703
2014-12-11 04:04:33 C 02 33 03.55 +21 20 36.5 q 703
2014-12-11 05:05:34 C 02 33 01.653 +21 20 26.31 L F51
2014-12-11 05:23:10 C 02 33 01.069 +21 20 23.39 L F51
2014-12-11 05:58:19 C 02 32 59.898 +21 20 17.45 L F51
2015-02-14 02:06:02 C 02 25 35.62 +19 51 28.6 R G45
2015-02-14 02:12:00 C 02 25 35.72 +19 51 28.7 R G45
2015-02-14 02:51:18 C 02 25 36.48 +19 51 29.7 R G45
2015-02-14 03:09:00 C 02 25 36.81 +19 51 31.6 R G45
2015-11-06 10:25:08 C 05 03 07.26 +32 57 44.2 R G45
2015-11-06 10:34:30 C 05 03 06.84 +32 57 44.9 R G45
2015-11-06 10:43:49 C 05 03 06.45 +32 57 45.2 R G45
2015-11-06 10:52:56 C 05 03 06.01 +32 57 46.4 R G45
2015-11-19 09:50:40 C 04 47 35.76 +33 10 29.5 q G96
2015-11-19 09:59:45 C 04 47 35.26 +33 10 29.6 q G96
2015-11-19 10:17:57 C 04 47 34.21 +33 10 29.7 q G96
2015-11-22 09:46:35 C 04 43 30.48 +33 10 23.3 R G45
2015-11-22 10:03:44 C 04 43 29.48 +33 10 23.2 R G45
2015-11-22 10:12:05 C 04 43 28.99 +33 10 22.9 R G45
2015-11-22 10:12:54 C 04 43 28.93 +33 10 22.8 R G45
2015-11-22 10:20:05 C 04 43 28.51 +33 10 22.9 R G45
2015-11-29 18:30:32 C 04 32 56.06 +33 04 32.1 q D29
2015-11-29 18:50:33 C 04 32 54.80 +33 04 31.4 q D29
2015-11-29 19:10:34 C 04 32 53.61 +33 04 29.9 q D29
2015-11-30 09:10:56 C 04 32 01.96 +33 03 40.4 q 703
2015-11-30 09:21:45 C 04 32 01.27 +33 03 40.2 q 703
2015-11-30 09:32:35 C 04 32 00.64 +33 03 39.8 q 703
2015-11-30 09:43:23 C 04 31 59.89 +33 03 38.8 q 703
2015-12-05 04:43:46 C 04 24 52.11 +32 54 57.0 N I41
2015-12-05 05:23:54 C 04 24 49.59 +32 54 53.5 N I41
2015-12-07 05:38:28 C 04 21 49.22 +32 50 12.3 N I41
2015-12-07 06:40:26 C 04 21 45.29 +32 50 06.0 N I41
2015-12-07 10:00:53 C 04 21 32.83 +32 49 46.5 L T05
2015-12-07 10:07:52 C 04 21 32.29 +32 49 45.7 L T05
2015-12-07 10:45:52 C 04 21 29.92 +32 49 41.6 L T05
2015-12-07 11:25:07 C 04 21 27.44 +32 49 37.1 L T05
2015-12-08 04:47:44 C 04 20 22.84 +32 47 44.6 N I41
2015-12-08 05:21:08 C 04 20 20.73 +32 47 41.1 N I41
2015-12-08 09:07:22 C 04 20 06.62 +32 47 17.6 L T05
2015-12-08 09:26:22 C 04 20 05.44 +32 47 15.8 L T05
2015-12-08 09:36:06 C 04 20 04.81 +32 47 14.6 L T05
2015-12-08 10:26:34 C 04 20 01.58 +32 47 09.1 L T05
2015-12-09 04:52:33 C 04 18 53.15 +32 45 02.6 N I41
2015-12-09 05:44:23 C 04 18 49.90 +32 44 56.9 N I41
2015-12-09 09:08:58 C 04 18 37.15 +32 44 33.0 L T05