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
2021-09-10 11:22:35 C 04 44 55.79 +28 44 09.7 U I41
2021-09-10 11:40:25 C 04 44 55.86 +28 44 11.7 U I41
2021-09-12 11:13:55 C 04 45 07.68 +28 48 56.7 U I41
2021-09-12 11:40:55 C 04 45 07.77 +28 48 59.4 U I41
2021-09-14 11:28:53 C 04 45 15.05 +28 53 41.9 U I41
2021-09-14 11:45:31 C 04 45 15.07 +28 53 43.6 U I41
2021-10-16 07:11:48 C 04 35 32.42 +29 53 58.8 V G96
2021-10-16 07:20:04 C 04 35 32.22 +29 53 59.2 V G96
2021-10-16 07:28:17 C 04 35 31.94 +29 53 59.7 V G96
2021-10-16 07:36:31 C 04 35 31.73 +29 54 00.1 V G96
2021-10-16 08:23:11 C 04 35 30.49 +29 54 02.8 V 703
2021-10-16 08:30:52 C 04 35 30.16 +29 54 02.7 V 703
2021-10-16 08:41:10 C 04 35 29.89 +29 54 04.2 V 703
2021-10-16 08:48:50 C 04 35 29.68 +29 54 04.9 V 703
2021-11-03 12:36:04 C 04 19 32.01 +30 02 25.0 V T08
2021-11-03 12:47:45 C 04 19 31.42 +30 02 24.8 V T08
2021-11-03 12:53:18 C 04 19 31.22 +30 02 23.9 V T08
2021-11-03 13:39:44 C 04 19 29.13 +30 02 23.6 V T08
2021-11-05 06:13:24 C 04 17 40.07 +30 01 34.1 U I41
2021-11-05 06:29:05 C 04 17 39.34 +30 01 34.4 V 703
2021-11-05 06:37:22 C 04 17 39.01 +30 01 34.1 V 703
2021-11-05 06:45:40 C 04 17 38.56 +30 01 33.2 V 703
2021-11-05 06:53:57 C 04 17 38.13 +30 01 33.2 V 703
2021-11-05 07:49:46 C 04 17 35.61 +30 01 32.1 U I41
2021-11-05 08:13:45 C 04 17 34.48 +30 01 31.7 V G96
2021-11-05 08:21:13 C 04 17 34.13 +30 01 31.3 V G96
2021-11-05 08:28:38 C 04 17 33.79 +30 01 31.5 V G96
2021-11-05 08:36:02 C 04 17 33.44 +30 01 31.1 V G96
2021-11-05 11:33:37 C 04 17 25.37 +30 01 26.3 V T05
2021-11-05 11:59:23 C 04 17 24.12 +30 01 26.8 V T05
2021-11-05 12:04:19 C 04 17 23.93 +30 01 26.1 V T05
2021-11-05 12:42:48 C 04 17 22.13 +30 01 24.8 V T05
2021-11-05 12:51:25 C 04 17 21.76 +30 01 25.1 V T05
2021-11-06 05:48:23 C 04 16 35.26 +30 00 58.4 V 703
2021-11-06 05:56:08 C 04 16 34.84 +30 00 57.0 V 703
2021-11-06 06:03:51 C 04 16 34.49 +30 00 56.9 V 703
2021-11-06 06:11:34 C 04 16 34.13 +30 00 56.2 V 703
2021-11-07 07:21:21 C 04 15 23.91 +30 00 10.7 U I41
2021-11-07 07:57:44 C 04 15 22.18 +30 00 09.5 U I41
2021-11-08 16:07:22 C 04 13 51.038 +29 59 02.18 V P07
2021-11-08 18:20:28 C 04 13 44.609 +29 58 56.42 V P07
2021-11-08 19:19:36 C 04 13 41.688 +29 58 53.80 V P07
2021-11-08 20:13:34 C 04 13 39.130 +29 58 52.07 V P07
2021-11-09 16:09:05 C 04 12 41.986 +29 58 01.88 V P07
2021-11-09 17:21:35 C 04 12 38.390 +29 57 58.79 V P07
2021-11-09 18:17:13 C 04 12 35.659 +29 57 55.80 V P07
2021-11-09 19:20:04 C 04 12 32.594 +29 57 53.42 V P07
2021-11-09 20:12:57 C 04 12 30.053 +29 57 50.90 V P07
2021-11-11 11:15:10 C 04 10 36.04 +29 55 55.3 V T08
2021-11-11 11:19:50 C 04 10 35.84 +29 55 56.2 V T08