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
2021-01-24 08:44:07 S 05 59 12.134 -71 04 37.31 V C57
2021-01-24 08:44:07 s 1 -196163.58 5 +219077.53 7470.0 C57
2021-01-24 08:54:07 S 05 59 10.351 -71 04 52.25 V C57
2021-01-24 08:54:07 s 1 -196248.34 1 +218477.56 6960.0 C57
2021-01-24 09:04:07 S 05 59 08.911 -71 05 07.33 V C57
2021-01-24 09:04:07 s 1 -196332.00 5 +217876.38 4550.0 C57
2021-01-24 09:14:07 S 05 59 07.361 -71 05 23.10 V C57
2021-01-24 09:14:07 s 1 -196414.57 1 +217273.99 220.0 C57
2021-01-24 09:24:07 S 05 59 05.885 -71 05 37.72 V C57
2021-01-24 09:24:07 s 1 -196496.03 6 +216670.38 3960.0 C57
2021-01-24 09:34:07 S 05 59 04.366 -71 05 53.99 V C57
2021-01-24 09:34:07 s 1 -196576.39 3 +216065.57 5770.0 C57
2021-01-24 09:44:07 S 05 59 02.542 -71 06 08.50 V C57
2021-01-24 09:44:07 s 1 -196655.63 9 +215459.53 5630.0 C57
2021-01-24 09:54:07 S 05 59 00.816 -71 06 23.29 V C57
2021-01-24 09:54:07 s 1 -196733.76 8 +214852.28 3540.0 C57
2021-01-24 10:04:07 S 05 58 59.314 -71 06 38.20 V C57
2021-01-24 10:04:07 s 1 -196810.77 5 +214243.81 9490.0 C57
2021-01-24 10:14:07 S 05 58 57.600 -71 06 52.45 V C57
2021-01-24 10:14:07 s 1 -196886.65 6 +213634.12 3460.0 C57
2021-01-24 10:24:07 S 05 58 56.306 -71 07 08.33 V C57
2021-01-24 10:24:07 s 1 -196961.40 6 +213023.21 5460.0 C57
2021-01-24 10:34:07 S 05 58 54.701 -71 07 23.88 V C57
2021-01-24 10:34:07 s 1 -197035.01 9 +212411.08 5470.0 C57
2021-01-24 10:44:07 S 05 58 53.038 -71 07 37.85 V C57
2021-01-24 10:44:07 s 1 -197107.49 1 +211797.72 3480.0 C57
2021-01-24 10:54:07 S 05 58 51.413 -71 07 53.80 V C57
2021-01-24 10:54:07 s 1 -197178.81 6 +211183.14 9480.0 C57
2021-01-24 11:04:07 S 05 58 49.982 -71 08 07.55 V C57
2021-01-24 11:04:07 s 1 -197248.98 9 +210567.33 3470.0 C57
2021-01-24 11:14:07 S 05 58 48.118 -71 08 22.99 V C57
2021-01-24 11:14:07 s 1 -197318.00 6 +209950.29 5430.0 C57
2021-01-24 11:24:07 S 05 58 46.471 -71 08 38.26 V C57
2021-01-24 11:24:07 s 1 -197385.86 0 +209332.03 5360.0 C57
2021-01-24 11:34:07 S 05 58 45.053 -71 08 54.20 V C57
2021-01-24 11:34:07 s 1 -197452.54 8 +208712.53 3240.0 C57
2021-01-24 11:44:07 S 05 58 43.764 -71 09 09.07 V C57
2021-01-24 11:44:07 s 1 -197518.06 3 +208091.80 9070.0 C57
2021-01-24 11:54:07 S 05 58 41.892 -71 09 23.11 V C57
2021-01-24 11:54:07 s 1 -197582.40 0 +207469.83 2840.0 C57
2021-01-24 12:04:07 S 05 58 40.260 -71 09 37.73 V C57
2021-01-24 12:04:07 s 1 -197645.55 4 +206846.63 4530.0 C57
2021-01-24 12:14:07 S 05 58 38.575 -71 09 53.14 V C57
2021-01-24 12:14:07 s 1 -197707.52 0 +206222.20 4140.0 C57
2021-01-24 12:24:07 S 05 58 36.792 -71 10 07.61 V C57
2021-01-24 12:24:07 s 1 -197768.29 2 +205596.52 1660.0 C57
2021-01-24 12:34:07 S 05 58 35.321 -71 10 22.33 V C57
2021-01-24 12:34:07 s 1 -197827.86 5 +204969.60 7080.0 C57
2021-01-24 12:44:07 S 05 58 33.926 -71 10 39.29 V C57
2021-01-24 12:44:07 s 1 -197886.23 3 +204341.45 390.0 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)