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
2021-06-14 00:49:19 S 13 19 08.08 +05 46 50.0 L C51
2021-06-14 00:49:30 S 13 19 08.08 +05 46 50.0 L C51
2021-06-14 02:22:50 S 13 19 07.47 +05 46 54.5 L C51
2021-06-14 03:56:54 S 13 19 06.87 +05 46 57.6 L C51
2021-06-14 05:31:42 S 13 19 06.29 +05 46 59.6 L C51
2021-06-14 07:05:57 S 13 19 05.72 +05 47 02.4 L C51
2021-06-14 08:40:01 S 13 19 05.18 +05 47 04.6 L C51
2021-06-14 11:47:36 S 13 19 04.12 +05 47 11.4 L C51
2021-06-14 14:56:28 S 13 19 03.12 +05 47 15.2 L C51
2021-06-14 18:04:36 S 13 19 02.170 +05 47 19.82 L C51
2021-06-14 18:13:33 C 13 19 01.97 +05 47 09.2 V C40
2021-06-14 18:15:14 C 13 19 01.96 +05 47 09.3 V C40
2021-06-14 18:18:38 C 13 19 01.92 +05 47 09.5 V C40
2021-06-14 18:20:20 C 13 19 01.91 +05 47 09.5 V C40
2021-06-14 18:23:44 C 13 19 01.89 +05 47 09.5 V C40
2021-06-14 18:32:13 C 13 19 01.81 +05 47 09.6 V C40
2021-06-14 18:33:55 C 13 19 01.80 +05 47 09.8 V C40
2021-06-14 18:45:49 C 13 19 01.71 +05 47 09.9 V C40
2021-06-14 18:49:13 C 13 19 01.68 +05 47 10.1 V C40
2021-06-14 18:50:55 C 13 19 01.67 +05 47 10.1 V C40
2021-06-14 18:54:18 C 13 19 01.64 +05 47 10.1 V C40
2021-06-14 18:57:42 C 13 19 01.61 +05 47 10.1 V C40
2021-06-14 19:01:05 C 13 19 01.57 +05 47 10.2 V C40
2021-06-14 19:02:47 C 13 19 01.57 +05 47 10.3 V C40
2021-06-14 19:09:08 C 13 19 01.51 +05 47 10.3 V C40
2021-06-14 19:19:19 C 13 19 01.44 +05 47 10.7 V C40
2021-06-14 19:33:40 C 13 19 01.32 +05 47 10.8 V C40
2021-06-14 19:37:04 C 13 19 01.31 +05 47 10.9 V C40
2021-06-14 19:47:29 C 13 19 01.22 +05 47 11.1 V C40
2021-06-14 19:49:11 C 13 19 01.21 +05 47 11.1 V C40
2021-06-14 19:52:35 C 13 19 01.19 +05 47 11.1 V C40
2021-06-14 20:07:53 C 13 19 01.08 +05 47 11.6 V C40
2021-06-14 20:09:35 C 13 19 01.06 +05 47 11.5 V C40
2021-06-14 20:11:17 C 13 19 01.06 +05 47 11.6 V C40
2021-06-14 20:12:58 C 13 19 01.04 +05 47 11.7 V C40
2021-06-14 20:14:40 C 13 19 01.03 +05 47 11.7 V C40
2021-06-14 20:18:04 C 13 19 01.00 +05 47 11.8 V C40
2021-06-14 20:19:45 C 13 19 00.99 +05 47 11.8 V C40
2021-06-14 20:23:09 C 13 19 00.98 +05 47 11.7 V C40
2021-06-14 20:24:51 C 13 19 00.96 +05 47 11.6 V C40
2021-06-15 07:05:34 C 13 18 58.64 +05 47 29.4 V T08
2021-06-15 07:12:55 C 13 18 58.57 +05 47 29.5 V T08
2021-06-15 07:18:14 C 13 18 58.54 +05 47 29.4 V T08
2021-06-15 07:43:37 C 13 18 58.33 +05 47 29.7 V T08
2021-06-15 19:50:23 C 13 18 56.12 +05 47 28.0 V C40
2021-06-15 19:52:07 C 13 18 56.10 +05 47 28.0 V C40
2021-06-15 19:55:36 C 13 18 56.08 +05 47 28.0 V C40
2021-06-15 19:57:19 C 13 18 56.07 +05 47 28.0 V C40
2021-06-15 20:28:37 C 13 18 55.91 +05 47 28.0 V C40
2021-06-15 20:40:47 C 13 18 55.85 +05 47 27.9 V C40