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
2021-01-30 09:34:07 s 1 +111145.14 2 +293959.29 2180.0 – C57
2021-01-30 09:44:07 S 05 35 48.667 -75 06 36.58 – V C57
2021-01-30 09:44:07 s 1 +110861.21 7 +294428.55 1850.0 – C57
2021-01-30 09:54:07 S 05 35 46.226 -75 06 54.79 – V C57
2021-01-30 09:54:07 s 1 +110576.78 3 +294896.46 550.0 – C57
2021-01-30 10:04:07 S 05 35 43.483 -75 07 11.82 – V C57
2021-01-30 10:04:07 s 1 +110291.84 3 +295363.01 8300.0 – C57
2021-01-30 10:14:07 S 05 35 40.901 -75 07 28.67 – V C57
2021-01-30 10:14:07 s 1 +110006.39 9 +295828.21 5090.0 – C57
2021-01-30 10:24:07 S 05 35 38.254 -75 07 46.85 – V C57
2021-01-30 10:24:07 s 1 +109720.45 5 +296292.07 930.0 – C57
2021-01-30 10:34:07 S 05 35 35.731 -75 08 03.66 – V C57
2021-01-30 10:34:07 s 1 +109434.01 3 +296754.57 5820.0 – C57
2021-01-30 10:44:07 S 05 35 33.238 -75 08 20.51 – V C57
2021-01-30 10:44:07 s 1 +109147.07 6 +297215.73 9780.0 – C57
2021-01-30 10:54:07 S 05 35 30.514 -75 08 38.18 – V C57
2021-01-30 10:54:07 s 1 +108859.64 8 +297675.55 2800.0 – C57
2021-01-30 11:04:07 S 05 35 28.075 -75 08 55.07 – V C57
2021-01-30 11:04:07 s 1 +108571.73 0 +298134.03 4890.0 – C57
2021-01-30 11:14:07 S 05 35 25.375 -75 09 14.15 – V C57
2021-01-30 11:14:07 s 1 +108283.32 6 +298591.16 6050.0 – C57
2021-01-30 11:24:07 S 05 35 22.901 -75 09 30.96 – V C57
2021-01-30 11:24:07 s 1 +107994.43 9 +299046.97 6300.0 – C57
2021-01-30 11:34:07 S 05 35 20.347 -75 09 48.02 – V C57
2021-01-30 11:34:07 s 1 +107705.07 0 +299501.43 5640.0 – C57
2021-01-30 11:44:07 S 05 35 17.698 -75 10 05.30 – V C57
2021-01-30 11:44:07 s 1 +107415.22 4 +299954.57 4060.0 – C57
2021-01-30 11:54:07 S 05 35 14.947 -75 10 23.34 – V C57
2021-01-30 11:54:07 s 1 +107124.90 2 +300406.37 1580.0 – C57
2021-01-30 12:04:07 S 05 35 12.269 -75 10 41.02 – V C57
2021-01-30 12:04:07 s 1 +106834.10 8 +300856.85 8200.0 – C57
2021-01-30 12:14:07 S 05 35 09.938 -75 10 57.86 – V C57
2021-01-30 12:14:07 s 1 +106542.84 4 +301305.99 3930.0 – C57
2021-01-30 12:24:07 S 05 35 07.399 -75 11 13.49 – V C57
2021-01-30 12:24:07 s 1 +106251.11 3 +301753.82 8760.0 – C57
2021-01-30 12:34:07 S 05 35 04.351 -75 11 31.96 – V C57
2021-01-30 12:34:07 s 1 +105958.91 8 +302200.32 2720.0 – C57
2021-01-30 12:44:07 S 05 35 02.062 -75 11 50.32 – V C57
2021-01-30 12:44:07 s 1 +105666.26 0 +302645.50 5790.0 – C57
2021-01-30 12:54:07 S 05 34 59.446 -75 12 07.09 – V C57
2021-01-30 12:54:07 s 1 +105373.14 4 +303089.37 7980.0 – C57
2021-01-30 13:04:07 S 05 34 56.834 -75 12 23.83 – V C57
2021-01-30 13:04:07 s 1 +105079.57 1 +303531.92 9310.0 – C57
2021-01-30 13:14:07 S 05 34 54.202 -75 12 40.97 – V C57
2021-01-30 13:14:07 s 1 +104785.54 4 +303973.15 9770.0 – C57
2021-01-30 13:24:07 S 05 34 51.521 -75 12 59.36 – V C57
2021-01-30 13:24:07 s 1 +104491.06 6 +304413.07 9370.0 – C57
2021-01-30 13:34:07 S 05 34 49.128 -75 13 16.36 – V C57
2021-01-30 13:34:07 s 1 +104196.13 9 +304851.68 8120.0 – C57
2021-01-30 13:44:07 S 05 34 46.524 -75 13 33.56 – 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)