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
2008-12-06 05:18:01 C 03 11 42.88 +25 45 58.8 19.9 c 704
2008-12-06 05:36:04 C 03 11 42.19 +25 45 54.1 20.2 c 704
2008-12-06 05:54:04 C 03 11 41.35 +25 45 52.2 20.1 c 704
2008-12-07 04:48:18 C 03 10 43.35 +25 41 55.1 r 703
2008-12-07 04:56:08 C 03 10 42.88 +25 41 55.6 r 703
2008-12-07 05:04:03 C 03 10 42.56 +25 41 54.1 r 703
2008-12-07 05:11:56 C 03 10 42.31 +25 41 51.7 r 703
2008-12-31 05:27:33 C 02 51 57.13 +24 08 18.2 r 703
2008-12-31 05:40:30 C 02 51 56.84 +24 08 15.9 r 703
2008-12-31 05:53:25 C 02 51 56.59 +24 08 14.2 r 703
2008-12-31 06:06:27 C 02 51 56.30 +24 08 13.0 r 703
2009-09-22 10:00:55 C 06 19 35.03 +32 14 27.6 19.2 c 704
2009-09-22 10:18:12 C 06 19 35.53 +32 14 29.3 19.2 c 704
2009-09-22 10:35:26 C 06 19 36.07 +32 14 31.1 19.4 c 704
2009-09-22 10:52:49 C 06 19 36.60 +32 14 32.5 18.8 c 704
2009-10-16 09:55:54 C 06 29 50.17 +33 45 42.5 18.2 c 704
2009-10-16 10:15:13 C 06 29 50.26 +33 45 45.9 18.7 c 704
2009-10-16 10:34:14 C 06 29 50.39 +33 45 49.7 18.8 c 704
2009-10-16 10:53:24 C 06 29 50.49 +33 45 53.7 18.5 c 704
2009-10-18 10:03:06 C 06 30 05.53 +33 55 03.3 18.5 c 704
2009-10-18 10:22:10 C 06 30 05.47 +33 55 08.4 18.5 c 704
2009-10-18 10:41:14 C 06 30 05.57 +33 55 11.5 18.7 c 704
2009-10-18 11:00:17 C 06 30 05.61 +33 55 16.4 18.6 c 704
2009-10-18 11:19:39 C 06 30 05.64 +33 55 20.4 18.4 c 704
2009-10-24 08:32:08 C 06 30 09.09 +34 24 31.5 18.1 c 704
2009-10-24 08:51:34 C 06 30 09.03 +34 24 36.9 18.8 c 704
2009-10-24 09:10:57 C 06 30 08.97 +34 24 40.9 18.9 c 704
2009-10-24 09:30:37 C 06 30 08.83 +34 24 45.4 18.8 c 704
2009-10-24 09:50:26 C 06 30 08.68 +34 24 49.9 18.9 c 704
2009-11-21 10:49:09 C 06 12 36.97 +37 11 47.2 r 703
2009-11-21 10:58:41 C 06 12 36.43 +37 11 49.8 r 703
2009-11-21 11:08:08 C 06 12 35.96 +37 11 52.2 r 703
2009-11-21 11:17:44 C 06 12 35.42 +37 11 54.7 r 703
2009-11-24 08:55:44 C 06 08 45.67 +37 29 35.1 17.7 c 704
2009-11-24 09:56:52 C 06 08 42.23 +37 29 50.5 18.1 c 704
2009-11-24 10:16:19 C 06 08 40.94 +37 29 56.1 17.9 c 704
2009-11-24 10:34:20 C 06 08 39.83 +37 29 58.6 18.1 c 704
2009-11-24 10:52:28 C 06 08 38.71 +37 30 03.8 17.9 c 704
2009-11-28 01:04:09 C 06 03 19.34 +37 50 57.2 17.7 o C20
2009-11-28 01:10:37 C 06 03 18.92 +37 50 58.6 17.6 o C20
2009-12-07 23:27:12 C 05 45 29.05 +38 39 13.3 17.1 o C20
2009-12-07 23:31:24 C 05 45 28.68 +38 39 14.1 17.0 o C20
2009-12-09 00:12:50 C 05 43 23.35 +38 43 06.0 17.4 o C20
2009-12-09 00:19:11 C 05 43 22.81 +38 43 06.9 17.7 o C20
2009-12-10 23:34:35 C 05 39 16.51 +38 49 46.1 17.2 o C20
2009-12-10 23:38:49 C 05 39 16.12 +38 49 46.7 17.3 o C20
2009-12-13 21:56:19 C 05 32 55.48 +38 57 40.6 17.0 r 084
2009-12-14 03:36:59 C 05 32 23.79 +38 58 10.7 17.0 r 084
2009-12-14 03:42:14 C 05 32 23.34 +38 58 11.3 17.0 r 084
2009-12-16 01:26:39 C 05 28 06.76 +39 01 51.5 17.3 o C20