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
2021-06-06 22:00:14 C 13 21 37.78 +05 29 08.5 V C40
2021-06-06 22:07:11 C 13 21 37.63 +05 29 09.9 V C40
2021-06-07 05:29:47 C 13 21 27.99 +05 30 27.9 V G96
2021-06-07 05:37:15 C 13 21 27.80 +05 30 28.9 V G96
2021-06-07 05:44:43 C 13 21 27.61 +05 30 30.2 V G96
2021-06-07 05:52:11 C 13 21 27.41 +05 30 31.4 V G96
2021-06-07 07:59:32 C 13 21 24.79 +05 30 56.1 V T08
2021-06-07 08:04:12 C 13 21 24.66 +05 30 56.8 V T08
2021-06-07 08:14:52 C 13 21 24.39 +05 30 58.5 V T08
2021-06-07 08:35:34 C 13 21 23.84 +05 31 01.8 V T08
2021-06-07 18:14:00 C 13 21 11.93 +05 32 26.9 V C40
2021-06-07 18:19:14 C 13 21 11.80 +05 32 27.9 V C40
2021-06-07 18:22:43 C 13 21 11.72 +05 32 28.3 V C40
2021-06-07 18:24:27 C 13 21 11.68 +05 32 28.5 V C40
2021-06-07 18:29:39 C 13 21 11.55 +05 32 29.6 V C40
2021-06-07 18:31:24 C 13 21 11.51 +05 32 29.8 V C40
2021-06-07 18:33:08 C 13 21 11.47 +05 32 29.9 V C40
2021-06-07 18:36:37 C 13 21 11.38 +05 32 30.6 V C40
2021-06-07 18:38:20 C 13 21 11.35 +05 32 30.7 V C40
2021-06-07 18:40:06 C 13 21 11.30 +05 32 31.0 V C40
2021-06-07 18:41:49 C 13 21 11.26 +05 32 31.4 V C40
2021-06-07 18:46:59 C 13 21 11.13 +05 32 32.0 V C40
2021-06-07 18:48:43 C 13 21 11.08 +05 32 32.3 V C40
2021-06-07 18:52:11 C 13 21 11.01 +05 32 32.8 V C40
2021-06-07 18:57:24 C 13 21 10.88 +05 32 33.7 V C40
2021-06-07 19:02:38 C 13 21 10.75 +05 32 34.6 V C40
2021-06-07 19:04:22 C 13 21 10.70 +05 32 34.8 V C40
2021-06-07 19:06:05 C 13 21 10.66 +05 32 35.0 V C40
2021-06-07 19:07:51 C 13 21 10.62 +05 32 35.4 V C40
2021-06-07 19:09:34 C 13 21 10.59 +05 32 35.6 V C40
2021-06-07 19:11:19 C 13 21 10.55 +05 32 35.9 V C40
2021-06-07 19:13:03 C 13 21 10.50 +05 32 36.1 V C40
2021-06-07 19:14:47 C 13 21 10.46 +05 32 36.2 V C40
2021-06-07 19:16:32 C 13 21 10.41 +05 32 36.7 V C40
2021-06-07 19:18:16 C 13 21 10.37 +05 32 36.8 V C40
2021-06-07 19:21:49 C 13 21 10.29 +05 32 37.4 V C40
2021-06-07 19:25:16 C 13 21 10.21 +05 32 38.1 V C40
2021-06-07 19:30:30 C 13 21 10.08 +05 32 38.7 V C40
2021-06-07 19:32:13 C 13 21 10.04 +05 32 39.0 V C40
2021-06-07 19:33:59 C 13 21 09.99 +05 32 39.3 V C40
2021-06-07 19:35:43 C 13 21 09.95 +05 32 39.5 V C40
2021-06-07 19:37:26 C 13 21 09.92 +05 32 39.9 V C40
2021-06-07 19:39:28 C 13 21 09.95 +05 32 39.7 V 089
2021-06-07 19:42:01 C 13 21 09.87 +05 32 39.7 V 089
2021-06-07 19:44:34 C 13 21 09.83 +05 32 40.4 V 089
2021-06-07 19:47:07 C 13 21 09.76 +05 32 40.9 V 089
2021-06-07 19:49:40 C 13 21 09.70 +05 32 41.1 V 089
2021-06-07 19:52:13 C 13 21 09.63 +05 32 41.4 V 089
2021-06-07 19:54:46 C 13 21 09.59 +05 32 42.0 V 089
2021-06-07 19:57:19 C 13 21 09.52 +05 32 41.6 V 089