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
2020-11-16 06:01:44 C 02 17 24.72 +18 14 17.2 V 703
2020-11-16 06:47:32 C 02 17 22.49 +18 14 07.5 U I41
2020-11-16 07:46:06 C 02 17 19.64 +18 13 54.7 U I41
2020-11-17 01:58:54 C 02 16 27.85 +18 09 57.5 V W46
2020-11-17 02:12:37 C 02 16 27.18 +18 09 55.1 V W46
2020-11-17 02:44:05 C 02 16 25.69 +18 09 47.7 V W46
2020-11-17 10:43:04 C 02 16 02.914 +18 08 05.26 U F51
2020-11-17 11:01:07 C 02 16 02.047 +18 08 01.34 U F51
2020-11-17 11:19:07 C 02 16 01.186 +18 07 57.37 U F51
2020-11-17 11:37:08 C 02 16 00.326 +18 07 53.45 U F51
2020-11-23 03:53:42 C 02 09 55.37 +17 39 03.8 V G96
2020-11-23 04:01:04 C 02 09 55.05 +17 39 02.1 V G96
2020-11-23 04:08:26 C 02 09 54.74 +17 39 00.8 V G96
2020-11-23 04:15:49 C 02 09 54.39 +17 38 59.4 V G96
2020-12-03 06:05:10 C 02 00 50.93 +16 52 39.9 V 703
2020-12-03 06:12:42 C 02 00 50.67 +16 52 39.2 V 703
2020-12-03 06:20:14 C 02 00 50.46 +16 52 37.0 V 703
2020-12-03 06:27:47 C 02 00 50.23 +16 52 35.6 V 703
2020-12-04 10:25:49 C 01 59 56.69 +16 47 46.8 V T05
2020-12-04 10:30:27 C 01 59 56.53 +16 47 46.5 V T05
2020-12-04 10:38:24 C 01 59 56.28 +16 47 45.0 V T05
2020-12-04 10:53:37 C 01 59 55.78 +16 47 42.2 V T05
2020-12-05 05:03:44 C 01 59 22.22 +16 44 37.9 V 703
2020-12-05 05:11:36 C 01 59 21.96 +16 44 36.7 V 703
2020-12-05 05:19:27 C 01 59 21.76 +16 44 35.3 V 703
2020-12-05 05:27:17 C 01 59 21.48 +16 44 34.1 V 703
2020-12-05 06:25:13 C 01 59 19.69 +16 44 24.1 V G96
2020-12-05 06:32:37 C 01 59 19.45 +16 44 23.0 V G96
2020-12-05 06:40:02 C 01 59 19.22 +16 44 21.7 V G96
2020-12-05 06:47:26 C 01 59 18.97 +16 44 20.3 V G96
2020-12-06 06:43:08 C 01 58 36.04 +16 40 24.6 V 703
2020-12-06 06:50:42 C 01 58 35.86 +16 40 22.9 V 703
2020-12-06 06:58:15 C 01 58 35.59 +16 40 20.9 V 703
2020-12-06 07:05:48 C 01 58 35.40 +16 40 20.0 V 703
2020-12-07 05:10:31 C 01 57 57.254 +16 36 47.47 U F52
2020-12-07 05:28:57 C 01 57 56.716 +16 36 44.56 U F52
2020-12-07 05:47:27 C 01 57 56.178 +16 36 41.65 U F52
2020-12-07 06:06:02 C 01 57 55.634 +16 36 38.75 U F52
2020-12-08 07:16:48 C 01 57 13.46 +16 32 41.4 V T05
2020-12-08 07:25:12 C 01 57 13.23 +16 32 41.1 V T05
2020-12-08 07:31:47 C 01 57 13.04 +16 32 39.9 V T05
2020-12-08 07:46:57 C 01 57 12.57 +16 32 37.5 V T05
2020-12-10 04:28:24 C 01 56 01.94 +16 25 53.3 U I41
2020-12-10 05:14:06 C 01 56 00.74 +16 25 46.7 U I41
2020-12-11 04:56:09 C 01 55 25.547 +16 22 22.63 U F52
2020-12-11 05:12:03 C 01 55 25.144 +16 22 20.44 U F52
2020-12-11 05:27:55 C 01 55 24.749 +16 22 18.26 U F52
2020-12-11 05:43:53 C 01 55 24.345 +16 22 15.95 U F52
2020-12-12 04:39:21 C 01 54 51.49 +16 19 03.5 U I41
2020-12-12 05:47:29 C 01 54 49.86 +16 18 54.0 U I41