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
2020-12-12 07:46:08 C 01 54 47.136 +16 18 38.56 U F51
2020-12-12 07:57:04 C 01 54 46.92 +16 18 37.0 V T05
2020-12-12 08:02:20 C 01 54 46.75 +16 18 35.8 V T05
2020-12-12 08:06:03 C 01 54 46.657 +16 18 35.84 U F51
2020-12-12 08:12:55 C 01 54 46.52 +16 18 34.6 V T05
2020-12-12 08:36:09 C 01 54 45.93 +16 18 32.4 V T05
2020-12-14 07:27:59 C 01 53 43.67 +16 12 20.8 V T08
2020-12-14 07:32:38 C 01 53 43.60 +16 12 20.0 V T08
2020-12-14 07:40:10 C 01 53 43.38 +16 12 18.8 V T08
2020-12-14 07:54:46 C 01 53 43.08 +16 12 17.0 V T08
2020-12-17 07:43:47 C 01 52 18.680 +16 03 38.53 U F51
2020-12-17 07:57:14 C 01 52 18.423 +16 03 36.98 U F51
2020-12-17 08:10:46 C 01 52 18.171 +16 03 35.44 U F51
2020-12-17 08:24:15 C 01 52 17.915 +16 03 33.88 U F51
2020-12-22 06:26:53 C 01 50 27.64 +15 51 37.6 V T08
2020-12-22 07:01:12 C 01 50 27.21 +15 51 34.7 V T08
2020-12-22 07:07:45 C 01 50 27.16 +15 51 33.9 V T08
2020-12-22 07:19:48 C 01 50 26.94 +15 51 33.1 V T08
2021-01-02 02:36:55 C 01 48 22.30 +15 35 13.2 U I41
2021-01-02 03:35:21 C 01 48 22.08 +15 35 11.1 U I41
2021-01-04 03:41:59 C 01 48 15.61 +15 33 37.1 U I41
2021-01-04 04:48:25 C 01 48 15.47 +15 33 35.2 U I41
2021-01-06 06:44:07 C 01 48 14.070 +15 32 27.01 U F52
2021-01-06 07:01:35 C 01 48 14.064 +15 32 26.64 U F52
2021-01-06 07:19:04 C 01 48 14.062 +15 32 26.36 U F52
2021-01-06 07:36:32 C 01 48 14.055 +15 32 25.96 U F52
2021-01-13 03:50:55 C 01 48 45.23 +15 31 55.6 U I41
2021-01-13 04:16:12 C 01 48 45.40 +15 31 56.2 U I41
2021-01-14 03:09:48 C 01 48 53.90 +15 32 15.0 U I41
2021-01-14 03:40:31 C 01 48 54.10 +15 32 15.1 U I41
2021-01-16 03:10:30 C 01 49 14.87 +15 33 12.0 U I41
2021-01-16 03:28:16 C 01 49 15.01 +15 33 12.5 U I41
2021-01-17 02:40:37 C 01 49 26.66 +15 33 48.7 U I41
2021-01-17 03:36:57 C 01 49 27.13 +15 33 50.3 U I41
2021-01-18 03:30:49 C 01 49 40.15 +15 34 33.7 U I41
2021-01-18 04:57:12 C 01 49 40.90 +15 34 36.2 U I41
2021-02-07 03:11:34 C 01 57 10.05 +16 06 48.8 U I41
2021-02-07 03:40:44 C 01 57 10.66 +16 06 51.6 U I41
2021-02-11 03:56:26 C 01 59 18.63 +16 16 52.2 U I41
2021-02-11 04:48:21 C 01 59 19.80 +16 16 57.7 U I41
2021-03-06 03:10:58 C 02 14 34.46 +17 30 32.7 U I41
2021-03-07 03:06:27 C 02 15 20.08 +17 34 13.9 U I41
2021-03-07 03:13:46 C 02 15 20.33 +17 34 15.2 U I41
2021-03-07 03:17:26 C 02 15 20.44 +17 34 15.7 U I41
2021-09-05 10:11:00 C 04 44 05.97 +28 31 47.8 U I41
2021-09-05 11:49:37 C 04 44 06.78 +28 31 58.6 U I41
2021-09-06 10:54:06 C 04 44 18.36 +28 34 21.1 U I41
2021-09-06 11:18:53 C 04 44 18.53 +28 34 23.8 U I41
2021-09-07 11:14:35 C 04 44 29.44 +28 36 51.1 U I41
2021-09-07 11:39:47 C 04 44 29.60 +28 36 53.6 U I41