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
2021-07-02 17:34:00 S 19 20 07.642 +37 26 01.90 V C57
2021-07-02 17:34:00 s 1 -75376.182 0 +392758.04 5030.0 C57
2021-07-02 17:44:00 S 19 20 06.557 +37 26 02.40 V C57
2021-07-02 17:44:00 s 1 -75718.838 0 +392620.73 9430.0 C57
2021-07-02 17:54:00 S 19 20 06.185 +37 26 00.06 V C57
2021-07-02 17:54:00 s 1 -76061.332 0 +392482.54 3220.0 C57
2021-07-02 20:44:00 S 19 19 53.388 +37 25 38.64 V C57
2021-07-02 20:44:00 s 1 -81858.084 0 +389999.79 710.0 C57
2021-07-02 22:34:00 S 19 19 46.068 +37 25 24.02 V C57
2021-07-02 22:34:00 s 1 -85581.810 0 +388258.66 8270.0 C57
2021-07-02 22:54:00 S 19 19 44.426 +37 25 23.02 V C57
2021-07-02 22:54:00 s 1 -86256.447 0 +387930.70 7110.0 C57
2021-07-02 23:04:00 S 19 19 43.682 +37 25 19.96 V C57
2021-07-02 23:04:00 s 1 -86593.482 0 +387765.41 480.0 C57
2021-07-02 23:14:00 S 19 19 42.638 +37 25 18.55 V C57
2021-07-02 23:14:00 s 1 -86930.327 0 +387599.24 3150.0 C57
2021-07-03 02:34:00 S 19 19 28.714 +37 24 48.13 V C57
2021-07-03 02:34:00 s 1 -93625.870 0 +384091.49 5300.0 C57
2021-07-03 02:44:00 S 19 19 27.427 +37 24 55.01 V C57
2021-07-03 02:44:00 s 1 -93958.509 0 +383906.87 2630.0 C57
2021-07-03 03:34:00 S 19 19 24.050 +37 24 45.97 V C57
2021-07-03 03:34:00 s 1 -95618.529 0 +382970.55 7820.0 C57
2021-07-03 03:44:00 S 19 19 23.654 +37 24 40.61 V C57
2021-07-03 03:44:00 s 1 -95949.891 0 +382780.65 550.0 C57
2021-07-03 03:54:00 S 19 19 22.999 +37 24 41.04 V C57
2021-07-03 03:54:00 s 1 -96281.038 0 +382589.86 2500.0 C57
2021-07-03 04:14:00 S 19 19 21.278 +37 24 41.47 V C57
2021-07-03 04:14:00 s 1 -96942.678 0 +382205.63 4060.0 C57
2021-07-03 04:24:00 S 19 19 20.786 +37 24 38.02 V C57
2021-07-03 04:24:00 s 1 -97273.171 0 +382012.20 3660.0 C57
2021-07-03 04:34:00 S 19 19 19.860 +37 24 34.06 V C57
2021-07-03 04:34:00 s 1 -97603.444 0 +381817.88 2470.0 C57
2021-07-03 04:44:00 S 19 19 19.332 +37 24 31.43 V C57
2021-07-03 04:44:00 s 1 -97933.496 0 +381622.68 490.0 C57
2021-07-03 04:54:00 S 19 19 18.564 +37 24 35.82 V C57
2021-07-03 04:54:00 s 1 -98263.326 0 +381426.60 7710.0 C57
2021-07-03 05:04:00 S 19 19 18.055 +37 24 30.24 V C57
2021-07-03 05:04:00 s 1 -98592.933 0 +381229.63 4140.0 C57
2021-07-03 05:14:00 S 19 19 17.479 +37 24 30.35 V C57
2021-07-03 05:14:00 s 1 -98922.317 0 +381031.78 9770.0 C57
2021-07-03 05:24:00 S 19 19 16.543 +37 24 29.95 V C57
2021-07-03 05:24:00 s 1 -99251.477 0 +380833.04 4590.0 C57
2021-07-03 05:34:00 S 19 19 15.898 +37 24 27.11 V C57
2021-07-03 05:34:00 s 1 -99580.410 0 +380633.42 8610.0 C57
2021-07-03 05:44:00 S 19 19 14.880 +37 24 22.61 V C57
2021-07-03 05:44:00 s 1 -99909.117 0 +380432.92 1820.0 C57
2021-07-03 05:54:00 S 19 19 14.405 +37 24 24.26 V C57
2021-07-03 05:54:00 s 1 -100237.59 7 +380231.53 4220.0 C57
2021-07-03 06:04:00 S 19 19 13.682 +37 24 22.25 V C57
2021-07-03 06:04:00 s 1 -100565.84 8 +380029.26 5800.0 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)