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
2021-06-07 19:59:52 C 13 21 09.49 +05 32 42.5 V 089
2021-06-07 20:02:25 C 13 21 09.39 +05 32 42.9 V 089
2021-06-07 21:09:31 C 13 21 07.93 +05 32 53.3 X G02
2021-06-07 21:18:33 C 13 21 07.78 +05 32 54.0 X G02
2021-06-07 21:29:06 C 13 21 07.53 +05 32 55.6 X G02
2021-06-08 18:11:06 C 13 20 43.55 +05 35 55.1 V C40
2021-06-08 18:16:18 C 13 20 43.44 +05 35 55.8 V C40
2021-06-08 18:19:47 C 13 20 43.36 +05 35 56.3 V C40
2021-06-08 18:31:58 C 13 20 43.09 +05 35 57.9 V C40
2021-06-08 18:37:10 C 13 20 42.97 +05 35 58.7 V C40
2021-06-08 18:38:55 C 13 20 42.94 +05 35 58.8 V C40
2021-06-08 18:40:39 C 13 20 42.89 +05 35 59.1 V C40
2021-06-08 18:44:59 C 13 20 42.81 +05 35 59.7 V C40
2021-06-08 18:46:42 C 13 20 42.77 +05 36 00.0 V C40
2021-06-08 18:51:55 C 13 20 42.66 +05 36 00.7 V C40
2021-06-08 18:53:40 C 13 20 42.61 +05 36 00.8 V C40
2021-06-08 18:55:24 C 13 20 42.58 +05 36 01.2 V C40
2021-06-08 18:57:09 C 13 20 42.54 +05 36 01.4 V C40
2021-06-08 18:58:52 C 13 20 42.49 +05 36 01.7 V C40
2021-06-08 19:05:50 C 13 20 42.35 +05 36 02.5 V C40
2021-06-08 19:07:34 C 13 20 42.30 +05 36 02.8 V C40
2021-06-08 19:09:19 C 13 20 42.27 +05 36 03.0 V C40
2021-06-08 19:14:32 C 13 20 42.16 +05 36 03.8 V C40
2021-06-08 19:19:44 C 13 20 42.04 +05 36 04.3 V C40
2021-06-08 19:21:29 C 13 20 42.00 +05 36 04.6 V C40
2021-06-08 19:23:13 C 13 20 41.97 +05 36 04.8 V C40
2021-06-08 19:24:57 C 13 20 41.94 +05 36 05.2 V C40
2021-06-08 19:25:58 C 13 20 41.91 +05 36 05.3 V C40
2021-06-08 19:29:26 C 13 20 41.83 +05 36 05.7 V C40
2021-06-08 19:31:09 C 13 20 41.80 +05 36 06.0 V C40
2021-06-08 19:34:39 C 13 20 41.73 +05 36 06.4 V C40
2021-06-08 19:39:51 C 13 20 41.61 +05 36 07.2 V C40
2021-06-08 19:48:33 C 13 20 41.43 +05 36 08.3 V C40
2021-06-08 19:55:31 C 13 20 41.28 +05 36 09.2 V C40
2021-06-08 20:02:28 C 13 20 41.14 +05 36 10.2 V C40
2021-06-08 20:04:11 C 13 20 41.11 +05 36 10.4 V C40
2021-06-09 07:45:54 C 13 20 28.68 +05 37 47.4 V T05
2021-06-09 07:49:11 C 13 20 28.63 +05 37 47.7 V T05
2021-06-09 07:50:31 C 13 20 28.58 +05 37 47.8 V T05
2021-06-09 08:00:26 C 13 20 28.37 +05 37 48.9 V T05
2021-06-09 08:25:32 C 13 20 27.83 +05 37 52.1 V T05
2021-06-09 18:01:22 C 13 20 18.59 +05 38 55.1 V C40
2021-06-09 18:22:13 C 13 20 18.16 +05 38 57.3 V C40
2021-06-09 18:29:11 C 13 20 18.01 +05 38 58.0 V C40
2021-06-09 18:30:55 C 13 20 17.98 +05 38 58.3 V C40
2021-06-09 18:43:05 C 13 20 17.73 +05 38 59.6 V C40
2021-06-09 18:46:34 C 13 20 17.67 +05 39 00.0 V C40
2021-06-09 18:48:17 C 13 20 17.63 +05 39 00.3 V C40
2021-06-09 18:50:02 C 13 20 17.60 +05 39 00.4 V C40
2021-06-09 19:00:31 C 13 20 17.39 +05 39 01.7 V C40