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
2021-04-24 16:46:36 C 14 16 10.718 -03 19 53.94 V P07
2021-04-24 17:37:40 C 14 16 07.745 -03 19 20.42 V P07
2021-04-24 18:48:50 C 14 16 03.576 -03 18 33.95 V P07
2021-04-24 19:56:41 C 14 15 59.647 -03 17 49.45 V P07
2021-04-25 04:00:06 C 14 15 33.51 -03 12 31.4 q 834
2021-04-25 05:07:18 C 14 15 29.50 -03 11 47.3 q 834
2021-04-30 06:51:12 C 14 08 24.052 -01 51 08.64 U F52
2021-04-30 07:09:41 C 14 08 22.882 -01 50 56.26 U F52
2021-04-30 07:28:12 C 14 08 21.701 -01 50 43.81 U F52
2021-04-30 07:46:49 C 14 08 20.513 -01 50 31.39 U F52
2021-04-30 09:10:17 C 14 08 15.14 -01 49 35.7 V T05
2021-04-30 09:13:36 C 14 08 14.92 -01 49 33.2 V T05
2021-04-30 09:17:35 C 14 08 14.67 -01 49 30.6 V T05
2021-04-30 09:21:32 C 14 08 14.44 -01 49 27.2 V T05
2021-04-30 09:24:54 C 14 08 14.20 -01 49 25.7 V T05
2021-04-30 09:25:34 C 14 08 14.16 -01 49 24.9 V T05
2021-05-01 03:19:52 C 14 07 08.44 -01 37 11.2 q 834
2021-05-01 04:04:12 C 14 07 05.46 -01 36 41.9 q 834
2021-05-01 06:04:01 C 14 06 58.60 -01 35 38.4 Z U76
2021-05-01 06:05:04 C 14 06 58.49 -01 35 36.7 Z U76
2021-05-01 06:09:19 C 14 06 58.24 -01 35 34.2 Z U76
2021-05-01 06:59:24 C 14 06 54.87 -01 35 00.3 V G96
2021-05-01 07:07:27 C 14 06 54.34 -01 34 54.8 V G96
2021-05-01 07:15:30 C 14 06 53.82 -01 34 49.5 V G96
2021-05-01 07:23:32 C 14 06 53.30 -01 34 44.0 V G96
2021-05-01 07:45:29 C 14 06 52.17 -01 34 28.9 V 703
2021-05-01 08:00:30 C 14 06 50.94 -01 34 17.9 V 703
2021-05-01 08:08:01 C 14 06 50.36 -01 34 12.7 V 703
2021-05-02 09:10:13 C 14 05 17.89 -01 17 23.9 V T08
2021-05-02 09:12:52 C 14 05 17.71 -01 17 22.2 V T08
2021-05-02 09:18:11 C 14 05 17.35 -01 17 18.6 V T08
2021-05-02 09:25:31 C 14 05 16.88 -01 17 13.5 V T08
2021-05-04 01:29:07 C 14 02 45.67 -00 50 30.6 q L05
2021-05-04 02:01:43 C 14 02 43.56 -00 50 08.5 q L05
2021-05-04 09:15:34 C 14 02 16.23 -00 45 17.4 V 703
2021-05-04 09:22:36 C 14 02 15.76 -00 45 12.5 V 703
2021-05-04 09:29:37 C 14 02 15.30 -00 45 07.9 V 703
2021-05-04 09:36:39 C 14 02 14.83 -00 45 03.2 V 703
2021-05-04 10:21:47 C 14 02 12.42 -00 44 30.3 V T05
2021-05-04 10:27:04 C 14 02 12.08 -00 44 26.8 V T05
2021-05-04 10:28:23 C 14 02 11.96 -00 44 26.2 V T05
2021-05-04 10:35:14 C 14 02 11.50 -00 44 21.6 V T05
2021-05-04 10:35:54 C 14 02 11.46 -00 44 21.2 V T05
2021-05-04 10:43:14 C 14 02 10.97 -00 44 16.4 V T05
2021-05-04 11:03:29 C 14 02 09.60 -00 44 02.9 V T05
2021-05-04 13:00:28 C 14 02 02.23 -00 42 30.0 q E89
2021-05-04 13:08:31 C 14 02 01.68 -00 42 24.8 q E89
2021-05-04 13:16:39 C 14 02 01.14 -00 42 19.3 q E89
2021-05-04 13:28:56 C 14 02 00.34 -00 42 10.9 q E89
2021-05-05 14:17:08 C 14 00 26.54 -00 26 00.3 q D29