12538 (1998 OH)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4059016556 ± 4.35e-09
Semi-major axis (a)1.5415724184 AU ± 7.25e-10
Inclination (i)24.53563599° ± 8.41e-07
Long. of Asc. Node (Ω)220.68792372° ± 1.75e-06
Arg. of Perihelion (ω)321.78911043° ± 1.84e-06
Mean Anomaly (M)163.00612547° ± 9.55e-07
Mean Motion (n)0.5149515611°/day ± 3.63e-10
Perihelion dist (q)0.91584562 AU ± 6.72e-09
Aphelion dist (Q)2.16729922 AU ± 6.78e-09
Orbital Period1.91401747 yr ± 1.35e-09
Physical Parameters
H (abs. magnitude)15.96
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.272″
Uncertainty0
Orbit TypeApollo
MOID0.029256 AU
Observations Used10512
Radar Obs Used1
Gaia Obs Used113
Oppositions14
Arc Total1987-2025
First Observation Used1987-08-22
Last Observation Used2025-12-01
Observations (19002)
Date Type RA Dec Mag Band Observatory
2021-07-07 21:34:00 s 1 -174696.59 9 +22842.378 6780.0 C57
2021-07-07 21:44:00 S 19 11 14.448 +37 06 00.32 V C57
2021-07-07 21:44:00 s 1 -174262.44 7 +21955.936 5020.0 C57
2021-07-07 21:54:00 S 19 11 13.762 +37 06 01.01 V C57
2021-07-07 21:54:00 s 1 -173824.22 0 +21068.983 1120.0 C57
2021-07-07 22:04:00 S 19 11 12.929 +37 06 00.18 V C57
2021-07-07 22:04:00 s 1 -173381.89 1 +20181.534 4990.0 C57
2021-07-07 22:14:00 S 19 11 12.132 +37 05 57.70 V C57
2021-07-07 22:14:00 s 1 -172935.43 2 +19293.605 6570.0 C57
2021-07-07 22:24:00 S 19 11 11.393 +37 05 58.13 V C57
2021-07-07 22:24:00 s 1 -172484.81 5 +18405.213 5760.0 C57
2021-07-07 22:34:00 S 19 11 10.750 +37 05 51.72 V C57
2021-07-07 22:34:00 s 1 -172030.01 3 +17516.377 2500.0 C57
2021-07-07 22:44:00 S 19 11 09.955 +37 05 53.74 V C57
2021-07-07 22:44:00 s 1 -171570.99 6 +16627.112 6690.0 C57
2021-07-07 22:54:00 S 19 11 09.343 +37 05 52.87 V C57
2021-07-07 22:54:00 s 1 -171107.73 8 +15737.437 8270.0 C57
2021-07-07 23:04:00 S 19 11 08.290 +37 05 49.96 V C57
2021-07-07 23:04:00 s 1 -170640.20 8 +14847.370 7140.0 C57
2021-07-07 23:14:00 S 19 11 07.476 +37 05 46.57 V C57
2021-07-07 23:14:00 s 1 -170168.37 8 +13956.930 3230.0 C57
2021-07-07 23:24:00 S 19 11 06.722 +37 05 46.03 V C57
2021-07-07 23:24:00 s 1 -169692.21 9 +13066.136 6450.0 C57
2021-07-07 23:34:00 S 19 11 06.156 +37 05 46.46 V C57
2021-07-07 23:34:00 s 1 -169211.70 1 +12175.008 6710.0 C57
2021-07-07 23:44:00 S 19 11 05.165 +37 05 43.69 V C57
2021-07-07 23:44:00 s 1 -168726.79 5 +11283.564 3940.0 C57
2021-07-07 23:54:00 S 19 11 04.421 +37 05 41.71 V C57
2021-07-07 23:54:00 s 1 -168237.47 2 +10391.826 8050.0 C57
2021-07-08 00:04:00 S 19 11 03.782 +37 05 40.60 V C57
2021-07-08 00:04:00 s 1 -167743.70 0 + 9499.814 8950.0 C57
2021-07-08 00:14:00 S 19 11 02.909 +37 05 40.52 V C57
2021-07-08 00:14:00 s 1 -167245.45 0 + 8607.549 6560.0 C57
2021-07-08 00:24:00 S 19 11 02.270 +37 05 37.75 V C57
2021-07-08 00:24:00 s 1 -166742.69 2 + 7715.053 790.0 C57
2021-07-08 07:59:17 C 19 10 01.96 +37 05 44.8 Y U69
2021-07-08 08:20:36 C 19 10 00.32 +37 05 38.3 Y U69
2021-07-08 08:49:28 C 19 09 58.07 +37 05 28.8 Y U69
2021-07-09 19:44:13 C 19 07 27.70 +36 53 15.5 V K83
2021-07-09 19:47:22 C 19 07 27.58 +36 53 15.4 V K83
2021-07-09 19:50:32 C 19 07 27.29 +36 53 13.7 V K83
2021-07-09 23:54:00 S 19 06 47.587 +36 54 05.72 V C57
2021-07-09 23:54:00 s 1 +133932.13 3 -17323.375 9250.0 C57
2021-07-10 00:24:00 S 19 06 45.187 +36 53 49.56 V C57
2021-07-10 00:24:00 s 1 +135903.16 5 -14332.131 5460.0 C57
2021-07-10 00:34:00 S 19 06 44.083 +36 53 52.55 V C57
2021-07-10 00:34:00 s 1 +136546.63 8 -13333.564 3900.0 C57
2021-07-10 03:04:00 S 19 06 32.160 +36 52 33.17 V C57
2021-07-10 03:04:00 s 1 +145422.77 0 + 1693.297 6870.0 C57
2021-07-10 03:14:00 S 19 06 31.560 +36 52 32.45 V C57
Radar Observations (1)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2019-05-14 21:19:00 24772.1678 4 Hz 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)