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
2015-12-09 09:50:07 C 04 18 34.56 +32 44 29.3 L T05
2015-12-09 10:11:28 C 04 18 33.26 +32 44 27.1 L T05
2015-12-09 10:43:18 C 04 18 31.24 +32 44 23.9 L T05
2015-12-10 03:13:43 C 04 17 30.13 +32 42 25.4 u H21
2015-12-10 03:25:29 C 04 17 29.37 +32 42 23.2 u H21
2015-12-10 03:31:22 C 04 17 29.02 +32 42 22.4 u H21
2015-12-10 03:36:45 C 04 17 28.68 +32 42 21.9 u H21
2015-12-11 19:44:19 C 04 15 00.66 +32 37 19.3 o C41
2015-12-11 20:09:10 C 04 14 58.88 +32 37 16.6 o C41
2015-12-11 20:12:38 C 04 14 58.73 +32 37 16.5 o C41
2015-12-18 04:37:05 C 04 05 51.22 +32 15 00.3 q 703
2015-12-18 04:45:47 C 04 05 50.66 +32 14 58.8 q 703
2015-12-18 04:54:30 C 04 05 50.17 +32 14 57.8 q 703
2015-12-18 05:03:13 C 04 05 49.64 +32 14 55.6 q 703
2015-12-20 01:43:58 C 04 03 15.71 +32 07 33.2 q G96
2015-12-20 01:50:33 C 04 03 15.38 +32 07 31.0 q G96
2015-12-20 01:57:07 C 04 03 14.94 +32 07 30.4 q G96
2015-12-20 02:03:42 C 04 03 14.53 +32 07 29.8 q G96
2015-12-26 03:50:55 C 03 55 18.58 +31 41 27.4 u H21
2015-12-26 03:58:43 C 03 55 18.16 +31 41 25.7 u H21
2015-12-26 04:05:03 C 03 55 17.81 +31 41 24.3 u H21
2015-12-26 04:11:17 C 03 55 17.48 +31 41 23.0 u H21
2015-12-26 04:14:54 C 03 55 17.28 +31 41 22.4 u H21
2015-12-29 05:58:54 C 03 51 35.10 +31 27 20.1 q 703
2015-12-29 06:06:40 C 03 51 34.70 +31 27 18.6 q 703
2015-12-29 06:14:27 C 03 51 34.34 +31 27 17.2 q 703
2015-12-29 06:22:13 C 03 51 33.90 +31 27 15.3 q 703
2015-12-29 07:54:07 C 03 51 29.51 +31 27 00.2 L T05
2015-12-29 08:19:50 C 03 51 28.19 +31 26 53.5 L T05
2015-12-29 08:36:08 C 03 51 27.46 +31 26 51.6 L T05
2015-12-29 09:29:02 C 03 51 24.94 +31 26 40.6 L T05
2015-12-31 12:53:09 C 03 48 58.75 +31 16 37.8 o 300
2015-12-31 12:57:28 C 03 48 58.51 +31 16 36.9 o 300
2015-12-31 13:01:46 C 03 48 58.36 +31 16 36.9 o 300
2015-12-31 13:06:05 C 03 48 58.09 +31 16 36.6 o 300
2016-01-08 07:55:48 C 03 41 10.06 +30 39 40.6 L T05
2016-01-08 08:20:00 C 03 41 09.07 +30 39 36.4 L T05
2016-01-08 08:31:51 C 03 41 08.65 +30 39 34.1 L T05
2016-01-08 09:07:46 C 03 41 07.31 +30 39 26.4 L T05
2016-01-12 03:53:10 C 03 37 58.50 +30 21 47.7 R G45
2016-01-12 04:11:51 C 03 37 57.85 +30 21 44.1 R G45
2016-01-12 04:35:17 C 03 37 57.08 +30 21 39.5 R G45
2016-01-12 04:44:56 C 03 37 56.76 +30 21 37.7 R G45
2016-01-12 04:54:30 C 03 37 56.45 +30 21 35.5 q 703
2016-01-12 04:54:30 C 03 37 56.43 +30 21 35.9 R G45
2016-01-12 05:01:01 C 03 37 56.29 +30 21 34.1 q 703
2016-01-12 05:07:32 C 03 37 56.02 +30 21 33.6 q 703
2016-01-12 05:14:02 C 03 37 55.80 +30 21 32.2 q 703
2016-01-13 02:39:25 C 03 37 15.23 +30 17 26.8 R G45
2016-01-13 02:48:00 C 03 37 14.95 +30 17 25.1 R G45