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
2021-01-22 23:04:08 S 06 04 33.394 -70 12 09.14 – V C57
2021-01-22 23:04:08 s 1 -161709.50 9 +317154.54 7250.0 – C57
2021-01-22 23:14:07 S 06 04 31.872 -70 12 24.16 – V C57
2021-01-22 23:14:07 s 1 -161946.03 5 +316775.35 9540.0 – C57
2021-01-22 23:24:08 S 06 04 30.353 -70 12 41.51 – V C57
2021-01-22 23:24:08 s 1 -162182.05 1 +316395.15 970.0 – C57
2021-01-22 23:34:07 S 06 04 29.016 -70 12 57.35 – V C57
2021-01-22 23:34:07 s 1 -162417.55 6 +316013.96 1510.0 – C57
2021-01-22 23:44:07 S 06 04 27.427 -70 13 13.08 – V C57
2021-01-22 23:44:07 s 1 -162652.54 8 +315631.76 1180.0 – C57
2021-01-22 23:54:08 S 06 04 25.678 -70 13 28.70 – V C57
2021-01-22 23:54:08 s 1 -162887.02 5 +315248.57 9970.0 – C57
2021-01-23 00:04:07 S 06 04 24.082 -70 13 46.56 – V C57
2021-01-23 00:04:07 s 1 -163120.98 5 +314864.36 7870.0 – C57
2021-01-23 00:14:08 S 06 04 22.428 -70 14 02.00 – V C57
2021-01-23 00:14:08 s 1 -163354.42 7 +314479.16 4880.0 – C57
2021-01-23 00:24:07 S 06 04 20.767 -70 14 15.86 – V C57
2021-01-23 00:24:07 s 1 -163587.34 8 +314092.94 1000.0 – C57
2021-01-23 00:34:08 S 06 04 19.130 -70 14 33.68 – V C57
2021-01-23 00:34:08 s 1 -163819.74 7 +313705.73 6220.0 – C57
2021-01-23 00:44:07 S 06 04 17.918 -70 14 49.70 – V C57
2021-01-23 00:44:07 s 1 -164051.62 3 +313317.50 550.0 – C57
2021-01-23 00:54:08 S 06 04 16.289 -70 15 04.79 – V C57
2021-01-23 00:54:08 s 1 -164282.97 3 +312928.27 3980.0 – C57
2021-01-23 01:04:07 S 06 04 14.558 -70 15 21.06 – V C57
2021-01-23 01:04:07 s 1 -164513.79 5 +312538.03 6500.0 – C57
2021-01-23 01:14:07 S 06 04 12.926 -70 15 37.01 – V C57
2021-01-23 01:14:07 s 1 -164744.08 8 +312146.78 8120.0 – C57
2021-01-23 01:24:08 S 06 04 11.438 -70 15 52.70 – V C57
2021-01-23 01:24:08 s 1 -164973.85 0 +311754.52 8820.0 – C57
2021-01-23 01:34:07 S 06 04 09.710 -70 16 08.65 – V C57
2021-01-23 01:34:07 s 1 -165203.07 9 +311361.25 8610.0 – C57
2021-01-23 01:44:08 S 06 04 08.213 -70 16 25.90 – V C57
2021-01-23 01:44:08 s 1 -165431.77 3 +310966.97 7490.0 – C57
2021-01-23 01:54:07 S 06 04 06.907 -70 16 42.67 – V C57
2021-01-23 01:54:07 s 1 -165659.93 0 +310571.68 5440.0 – C57
2021-01-23 02:04:08 S 06 04 05.107 -70 16 58.30 – V C57
2021-01-23 02:04:08 s 1 -165887.54 9 +310175.38 2470.0 – C57
2021-01-23 02:14:07 S 06 04 03.569 -70 17 14.10 – V C57
2021-01-23 02:14:07 s 1 -166114.62 8 +309778.06 8570.0 – C57
2021-01-23 02:24:07 S 06 04 01.973 -70 17 29.33 – V C57
2021-01-23 02:24:07 s 1 -166341.16 4 +309379.73 3740.0 – C57
2021-01-23 02:34:07 S 06 04 00.581 -70 17 44.66 – V C57
2021-01-23 02:34:07 s 1 -166567.15 6 +308980.38 7980.0 – C57
2021-01-23 02:44:07 S 06 03 58.745 -70 18 00.76 – V C57
2021-01-23 02:44:07 s 1 -166792.60 2 +308580.02 1280.0 – C57
2021-01-23 02:54:08 S 06 03 57.168 -70 18 17.89 – V C57
2021-01-23 02:54:08 s 1 -167017.50 1 +308178.64 3650.0 – C57
2021-01-23 03:04:07 S 06 03 55.702 -70 18 33.77 – V C57
2021-01-23 03:04:07 s 1 -167241.84 9 +307776.25 5060.0 – 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)