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
1998-11-16 09:57:13 C 02 50 08.96 +22 08 17.1 c 566
1998-11-16 10:12:13 C 02 50 08.26 +22 08 14.6 c 566
1998-11-16 10:27:14 C 02 50 07.48 +22 08 11.7 c 566
1999-10-14 07:41:53 C 05 10 11.01 +31 38 48.9 18.9 a 704
1999-10-14 08:04:11 C 05 10 10.61 +31 38 52.1 19.5 a 704
1999-10-14 08:26:26 C 05 10 10.19 +31 38 53.8 19.4 a 704
1999-10-14 08:48:52 C 05 10 09.76 +31 38 56.3 19.3 a 704
1999-10-14 09:11:26 C 05 10 09.28 +31 38 58.8 19.4 a 704
1999-12-07 06:53:21 c 04 12 18.89 +32 01 53.5 d 703
1999-12-07 07:11:03 c 04 12 17.87 +32 01 51.3 d 703
1999-12-07 07:28:48 c 04 12 16.75 +32 01 49.5 d 703
1999-12-07 07:46:29 c 04 12 15.73 +32 01 46.6 d 703
1999-12-12 06:20:04 C 04 05 21.67 +31 46 18.8 17.1 a 704
1999-12-12 07:01:05 C 04 05 19.28 +31 46 13.0 17.3 a 704
1999-12-12 07:37:02 C 04 05 17.16 +31 46 07.9 17.0 a 704
1999-12-12 08:02:36 C 04 05 15.65 +31 46 03.9 17.4 a 704
1999-12-15 03:25:04 C 04 01 27.17 +31 36 03.9 18.0 a 704
1999-12-15 03:52:11 C 04 01 25.63 +31 36 00.3 18.2 a 704
1999-12-15 04:19:56 C 04 01 24.08 +31 35 55.4 18.8 a 704
1999-12-15 04:47:17 C 04 01 22.56 +31 35 52.0 18.1 a 704
1999-12-15 05:14:28 C 04 01 20.95 +31 35 47.2 17.7 a 704
2000-01-02 03:45:27 C 03 40 21.00 +30 19 15.0 18.6 a 704
2000-01-02 04:09:07 C 03 40 20.14 +30 19 12.0 18.9 a 704
2000-01-02 04:35:28 C 03 40 19.09 +30 19 06.5 19.2 a 704
2000-01-02 05:09:45 C 03 40 17.75 +30 19 00.4 18.8 a 704
2000-01-08 01:43:33 C 03 35 07.34 +29 52 37.3 18.8 a 704
2000-01-08 02:05:33 C 03 35 06.64 +29 52 33.8 18.9 a 704
2000-01-08 02:27:12 C 03 35 05.90 +29 52 29.5 18.7 a 704
2000-01-08 02:48:52 C 03 35 05.20 +29 52 25.6 19.6 a 704
2000-01-08 03:10:35 C 03 35 04.39 +29 52 21.2 18.5 a 704
2001-09-16 09:51:40 C 03 32 43.44 +22 19 26.5 18.7 c 644
2001-09-16 10:22:33 C 03 32 42.75 +22 19 26.9 19.2 c 644
2001-09-16 10:53:06 C 03 32 42.09 +22 19 27.2 18.9 c 644
2001-09-22 10:38:04 C 03 29 11.76 +22 19 22.5 18.7 c 644
2001-09-22 11:21:56 C 03 29 10.53 +22 19 21.9 18.6 c 644
2001-09-22 11:56:13 C 03 29 09.54 +22 19 21.6 19.1 c 644
2001-09-24 09:49:52 C 03 27 50.91 +22 18 35.3 19.1 i 704
2001-09-24 10:11:18 C 03 27 50.28 +22 18 35.6 19.4 i 704
2001-09-24 10:33:55 C 03 27 49.58 +22 18 35.9 19.7 i 704
2001-09-24 10:55:21 C 03 27 48.89 +22 18 34.7 19.3 i 704
2001-09-24 11:16:47 C 03 27 48.25 +22 18 34.8 19.3 i 704
2001-10-12 08:30:26 C 03 11 27.23 +21 52 49.5 c 699
2001-10-12 09:02:03 C 03 11 25.68 +21 52 46.5 c 699
2001-10-12 09:33:29 C 03 11 24.22 +21 52 43.2 c 699
2001-10-12 09:48:51 C 03 11 23.51 +21 52 40.8 c 699
2001-10-19 08:54:24 C 03 03 23.65 +21 33 03.1 d 691
2001-10-19 09:28:13 C 03 03 21.94 +21 32 58.5 d 691
2001-10-19 10:00:52 C 03 03 20.29 +21 32 54.2 d 691
2001-10-19 11:25:08 C 03 03 16.05 +21 32 41.0 V 644
2001-10-19 11:42:36 C 03 03 15.15 +21 32 38.5 V 644