12923 Zephyr (1999 GK4)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4927419454 ± 6.38e-09
Semi-major axis (a)1.9622252115 AU ± 6.65e-10
Inclination (i)5.30954016° ± 9.22e-07
Long. of Asc. Node (Ω)168.07921894° ± 1.08e-05
Arg. of Perihelion (ω)147.21088394° ± 1.08e-05
Mean Anomaly (M)194.87677812° ± 9.76e-07
Mean Motion (n)0.3585824243°/day ± 1.82e-10
Perihelion dist (q)0.99535454 AU ± 1.25e-08
Aphelion dist (Q)2.92909588 AU ± 1.25e-08
Orbital Period2.74867427 yr ± 1.40e-09
Physical Parameters
H (abs. magnitude)15.80
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.251″
Uncertainty0
Orbit TypeApollo
MOID0.019399 AU
Observations Used2585
Oppositions45
Arc Total1955-2026
First Observation Used1955-04-21
Last Observation Used2026-01-11
Observations (2948)
Date Type RA Dec Mag Band Observatory
2021-06-11 19:38:57 C 13 19 36.58 +05 43 41.2 V C40
2021-06-11 19:40:39 C 13 19 36.55 +05 43 41.5 V C40
2021-06-11 19:42:21 C 13 19 36.52 +05 43 41.6 V C40
2021-06-11 19:45:45 C 13 19 36.47 +05 43 41.7 V C40
2021-06-11 19:50:50 C 13 19 36.39 +05 43 42.1 V C40
2021-06-11 19:52:32 C 13 19 36.37 +05 43 42.4 V C40
2021-06-11 19:54:14 C 13 19 36.34 +05 43 42.4 V C40
2021-06-11 20:01:01 C 13 19 36.25 +05 43 42.8 V C40
2021-06-11 20:02:43 C 13 19 36.23 +05 43 43.0 V C40
2021-06-11 20:04:24 C 13 19 36.20 +05 43 43.2 V C40
2021-06-11 20:18:11 C 13 19 36.00 +05 43 44.2 V C40
2021-06-11 20:31:47 C 13 19 35.81 +05 43 45.2 V C40
2021-06-11 20:36:52 C 13 19 35.73 +05 43 45.4 V C40
2021-06-11 20:40:16 C 13 19 35.68 +05 43 45.9 V C40
2021-06-11 20:45:22 C 13 19 35.61 +05 43 46.1 V C40
2021-06-11 20:50:27 C 13 19 35.54 +05 43 46.5 V C40
2021-06-11 21:02:19 C 13 19 35.37 +05 43 47.3 V C40
2021-06-11 21:07:57 C 13 19 35.99 +05 43 52.0 o Z22
2021-06-11 21:10:10 C 13 19 35.28 +05 43 48.0 V C40
2021-06-11 21:24:16 C 13 19 35.74 +05 43 53.5 o Z22
2021-06-11 21:32:21 C 13 19 35.00 +05 43 49.4 V C40
2021-06-11 21:48:00 C 13 19 35.36 +05 43 54.9 o Z22
2021-06-12 20:22:28 C 13 19 20.95 +05 45 20.6 V C40
2021-06-12 20:24:10 C 13 19 20.94 +05 45 20.4 V C40
2021-06-12 20:27:34 C 13 19 20.90 +05 45 20.7 V C40
2021-06-12 20:30:57 C 13 19 20.86 +05 45 20.8 V C40
2021-06-12 20:36:03 C 13 19 20.79 +05 45 21.0 V C40
2021-06-12 20:44:32 C 13 19 20.69 +05 45 21.5 V C40
2021-06-12 20:51:31 C 13 19 20.62 +05 45 21.8 V C40
2021-06-12 21:00:00 C 13 19 20.52 +05 45 22.4 V C40
2021-06-12 21:01:41 C 13 19 20.50 +05 45 22.2 V C40
2021-06-12 21:10:10 C 13 19 20.41 +05 45 22.8 V C40
2021-06-12 21:13:34 C 13 19 20.37 +05 45 22.8 V C40
2021-06-12 21:15:16 C 13 19 20.36 +05 45 23.1 V C40
2021-06-12 21:20:23 C 13 19 20.31 +05 45 23.3 V C40
2021-06-12 21:25:28 C 13 19 20.25 +05 45 23.4 V C40
2021-06-13 08:40:48 C 13 19 14.51 +05 46 05.3 V T05
2021-06-13 08:45:27 C 13 19 14.46 +05 46 05.6 V T05
2021-06-13 08:56:41 C 13 19 14.33 +05 46 06.1 V T05
2021-06-13 09:45:55 C 13 19 13.78 +05 46 08.1 V T05
2021-06-13 18:07:12 C 13 19 10.66 +05 46 24.4 V C40
2021-06-13 18:24:10 C 13 19 10.49 +05 46 25.1 V C40
2021-06-13 18:33:03 S 13 19 10.65 +05 46 36.0 L C51
2021-06-13 18:47:57 C 13 19 10.25 +05 46 26.0 V C40
2021-06-13 18:56:26 C 13 19 10.17 +05 46 26.3 V C40
2021-06-13 21:04:10 C 13 19 09.21 +05 46 29.8 V G34
2021-06-13 21:08:52 C 13 19 09.17 +05 46 29.8 V G34
2021-06-13 21:13:35 C 13 19 09.12 +05 46 30.0 V G34
2021-06-13 21:18:17 C 13 19 09.07 +05 46 30.2 V G34
2021-06-13 21:41:11 S 13 19 09.33 +05 46 42.9 L C51