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
2017-11-18 07:55:18 C 02 36 40.79 +20 46 41.2 U 703
2017-11-18 08:10:47 C 02 36 40.03 +20 46 37.4 U 703
2017-11-18 09:57:15 C 02 36 35.10 +20 46 16.7 U T05
2017-11-18 10:14:22 C 02 36 34.26 +20 46 14.1 U T05
2017-11-18 10:33:35 C 02 36 33.33 +20 46 10.5 U T05
2017-11-18 10:45:02 C 02 36 32.81 +20 46 07.2 U T05
2017-11-22 05:55:45 C 02 32 21.70 +20 27 57.4 U 703
2017-11-22 06:07:12 C 02 32 21.21 +20 27 54.8 U 703
2017-11-22 06:16:06 C 02 32 20.80 +20 27 52.3 U 703
2017-11-22 06:26:09 C 02 32 20.35 +20 27 51.3 U 703
2017-11-22 10:05:30 C 02 32 10.55 +20 27 08.1 U T05
2017-11-22 10:23:00 C 02 32 09.73 +20 27 03.9 U T05
2017-11-22 10:26:36 C 02 32 09.550 +20 27 03.68 L F51
2017-11-22 10:42:14 C 02 32 08.84 +20 27 00.4 U T05
2017-11-22 10:46:37 C 02 32 08.644 +20 26 59.65 L F51
2017-11-22 10:52:39 C 02 32 08.36 +20 26 57.9 U T05
2017-11-22 11:06:47 C 02 32 07.730 +20 26 55.62 L F51
2017-11-22 11:26:48 C 02 32 06.821 +20 26 51.56 L F51
2017-11-26 06:12:28 C 02 28 11.62 +20 08 56.0 U 703
2017-11-26 06:20:06 C 02 28 11.19 +20 08 52.3 U 703
2017-11-26 06:27:44 C 02 28 10.83 +20 08 51.5 U 703
2017-11-26 06:35:21 C 02 28 10.51 +20 08 49.6 U 703
2017-11-27 04:29:27 C 02 27 16.07 +20 04 33.3 U G96
2017-11-27 04:36:55 C 02 27 15.76 +20 04 31.9 U G96
2017-11-27 04:44:26 C 02 27 15.45 +20 04 30.3 U G96
2017-11-27 04:51:57 C 02 27 15.12 +20 04 29.0 U G96
2017-12-07 05:21:13 C 02 18 21.920 +19 19 52.32 U F51
2017-12-07 05:41:01 C 02 18 21.262 +19 19 48.96 U F51
2017-12-10 08:47:34 C 02 16 00.88 +19 07 06.7 U T08
2017-12-10 09:00:57 C 02 16 00.40 +19 07 05.2 U T08
2017-12-10 09:09:02 C 02 16 00.21 +19 07 04.2 U T08
2017-12-10 09:24:53 C 02 15 59.75 +19 07 02.2 U T08
2017-12-10 13:05:22 C 02 15 53.30 +19 06 23.9 q D29
2017-12-10 13:25:44 C 02 15 52.71 +19 06 20.8 q D29
2017-12-10 13:46:05 C 02 15 52.04 +19 06 17.4 q D29
2017-12-14 04:37:32 C 02 13 27.39 +18 52 36.2 U 703
2017-12-14 04:45:12 C 02 13 27.18 +18 52 34.6 U 703
2017-12-14 04:45:24 C 02 13 27.19 +18 52 35.2 U G96
2017-12-14 04:52:52 C 02 13 26.96 +18 52 33.5 U 703
2017-12-14 04:52:52 C 02 13 26.98 +18 52 34.1 U G96
2017-12-14 05:00:21 C 02 13 26.79 +18 52 32.8 U G96
2017-12-14 05:00:32 C 02 13 26.80 +18 52 32.8 U 703
2017-12-14 05:07:47 C 02 13 26.58 +18 52 31.8 U G96
2018-02-25 02:52:34 C 02 20 07.21 +18 39 43.1 U G96
2018-02-25 03:00:38 C 02 20 07.42 +18 39 43.9 U G96
2018-02-25 03:08:43 C 02 20 07.65 +18 39 45.0 U G96
2018-02-25 03:16:46 C 02 20 07.83 +18 39 45.5 U G96
2018-10-22 11:00:42 C 04 51 22.437 +31 14 13.20 U F52
2018-10-22 11:16:54 C 04 51 21.926 +31 14 14.35 U F52
2018-10-22 11:33:03 C 04 51 21.422 +31 14 15.44 U F52