IAA RAS IAA Minor Planet Database

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
2020-12-20 16:54:08 s 1 +125769.62 1 +296471.30 7410.0 – C57
2020-12-20 17:04:08 S 07 02 30.096 -41 40 28.56 – V C57
2020-12-20 17:04:08 s 1 +125511.02 2 +296949.57 6510.0 – C57
2020-12-20 17:14:08 S 07 02 29.882 -41 40 54.77 – V C57
2020-12-20 17:14:08 s 1 +125251.87 8 +297426.57 5000.0 – C57
2020-12-20 17:24:08 S 07 02 29.630 -41 41 21.52 – V C57
2020-12-20 17:24:08 s 1 +124992.19 3 +297902.31 2900.0 – C57
2020-12-20 17:34:08 S 07 02 29.498 -41 41 47.44 – V C57
2020-12-20 17:34:08 s 1 +124731.97 0 +298376.78 190.0 – C57
2020-12-20 17:44:08 S 07 02 29.278 -41 42 13.86 – V C57
2020-12-20 17:44:08 s 1 +124471.21 0 +298849.99 6880.0 – C57
2020-12-20 17:54:08 S 07 02 28.879 -41 42 40.68 – V C57
2020-12-20 17:54:08 s 1 +124209.91 8 +299321.95 2980.0 – C57
2020-12-20 18:04:08 S 07 02 28.471 -41 43 07.97 – V C57
2020-12-20 18:04:08 s 1 +123948.09 5 +299792.65 8490.0 – C57
2020-12-20 18:14:08 S 07 02 28.294 -41 43 34.97 – V C57
2020-12-20 18:14:08 s 1 +123685.74 4 +300262.09 3420.0 – C57
2020-12-20 18:24:08 S 07 02 28.126 -41 44 02.83 – V C57
2020-12-20 18:24:08 s 1 +123422.86 9 +300730.28 7760.0 – C57
2020-12-20 18:34:08 S 07 02 27.679 -41 44 29.36 – V C57
2020-12-20 18:34:08 s 1 +123159.47 1 +301197.21 1520.0 – C57
2020-12-20 18:44:08 S 07 02 27.449 -41 44 56.36 – V C57
2020-12-20 18:44:08 s 1 +122895.55 3 +301662.90 4700.0 – C57
2020-12-20 18:54:08 S 07 02 26.467 -41 45 25.85 – V C57
2020-12-20 18:54:08 s 1 +122631.11 9 +302127.34 7310.0 – C57
2020-12-20 19:04:08 S 07 02 26.326 -41 45 48.13 – V C57
2020-12-20 19:04:08 s 1 +122366.17 0 +302590.54 9340.0 – C57
2020-12-20 19:14:08 S 07 02 26.359 -41 46 11.86 – V C57
2020-12-20 19:14:08 s 1 +122100.70 9 +303052.49 810.0 – C57
2020-12-20 19:24:08 S 07 02 26.436 -41 46 41.74 – V C57
2020-12-20 19:24:08 s 1 +121834.73 9 +303513.20 1720.0 – C57
2020-12-20 19:34:08 S 07 02 26.134 -41 47 08.05 – V C57
2020-12-20 19:34:08 s 1 +121568.26 3 +303972.67 2060.0 – C57
2020-12-20 19:44:08 S 07 02 25.800 -41 47 35.30 – V C57
2020-12-20 19:44:08 s 1 +121301.28 2 +304430.90 1840.0 – C57
2020-12-20 19:54:08 S 07 02 25.536 -41 48 02.27 – V C57
2020-12-20 19:54:08 s 1 +121033.80 1 +304887.89 1070.0 – C57
2020-12-20 20:04:08 S 07 02 25.258 -41 48 28.91 – V C57
2020-12-20 20:04:08 s 1 +120765.82 0 +305343.65 9740.0 – C57
2020-12-20 20:14:08 S 07 02 25.001 -41 48 55.30 – V C57
2020-12-20 20:14:08 s 1 +120497.34 3 +305798.17 7870.0 – C57
2020-12-20 20:24:08 S 07 02 24.742 -41 49 20.89 – V C57
2020-12-20 20:24:08 s 1 +120228.37 2 +306251.47 5450.0 – C57
2020-12-20 20:34:08 S 07 02 24.389 -41 49 49.94 – V C57
2020-12-20 20:34:08 s 1 +119958.91 0 +306703.54 2480.0 – C57
2020-12-20 20:44:08 S 07 02 24.134 -41 50 13.85 – V C57
2020-12-20 20:44:08 s 1 +119688.95 9 +307154.37 8980.0 – C57
2020-12-20 20:54:08 S 07 02 23.849 -41 50 41.89 – V C57
2020-12-20 20:54:08 s 1 +119418.52 2 +307603.99 4940.0 – C57
2020-12-20 21:04:08 S 07 02 23.676 -41 51 07.70 – 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)