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
2021-01-23 07:24:08 S 06 03 14.542 -70 25 26.69 – V C57
2021-01-23 07:24:08 s 1 -172875.50 5 +296954.46 9440.0 – C57
2021-01-23 07:34:07 S 06 03 12.960 -70 25 42.89 – V C57
2021-01-23 07:34:07 s 1 -173084.26 0 +296524.31 4060.0 – C57
2021-01-23 07:44:08 S 06 03 11.582 -70 25 59.59 – V C57
2021-01-23 07:44:08 s 1 -173292.40 9 +296093.12 7640.0 – C57
2021-01-23 07:54:07 S 06 03 09.895 -70 26 14.89 – V C57
2021-01-23 07:54:07 s 1 -173499.94 9 +295660.88 180.0 – C57
2021-01-23 08:04:07 S 06 03 08.273 -70 26 30.48 – V C57
2021-01-23 08:04:07 s 1 -173706.87 8 +295227.61 1660.0 – C57
2021-01-23 08:14:07 S 06 03 06.542 -70 26 46.14 – V C57
2021-01-23 08:14:07 s 1 -173913.19 5 +294793.30 2090.0 – C57
2021-01-23 08:24:07 S 06 03 04.898 -70 27 00.58 – V C57
2021-01-23 08:24:07 s 1 -174118.89 6 +294357.94 1450.0 – C57
2021-01-23 08:34:07 S 06 03 03.391 -70 27 16.20 – V C57
2021-01-23 08:34:07 s 1 -174323.98 1 +293921.53 9760.0 – C57
2021-01-23 08:44:07 S 06 03 01.740 -70 27 34.27 – V C57
2021-01-23 08:44:07 s 1 -174528.44 5 +293484.09 7000.0 – C57
2021-01-23 08:54:08 S 06 03 00.406 -70 27 49.90 – V C57
2021-01-23 08:54:08 s 1 -174732.28 9 +293045.60 3170.0 – C57
2021-01-23 09:04:07 S 06 02 58.714 -70 28 05.95 – V C57
2021-01-23 09:04:07 s 1 -174935.50 8 +292606.06 8260.0 – C57
2021-01-23 09:14:08 S 06 02 56.983 -70 28 21.50 – V C57
2021-01-23 09:14:08 s 1 -175138.10 1 +292165.47 2280.0 – C57
2021-01-23 09:24:07 S 06 02 55.608 -70 28 36.88 – V C57
2021-01-23 09:24:07 s 1 -175340.06 6 +291723.84 5210.0 – C57
2021-01-23 09:34:07 S 06 02 53.782 -70 28 51.28 – V C57
2021-01-23 09:34:07 s 1 -175541.40 0 +291281.15 7060.0 – C57
2021-01-23 09:44:07 S 06 02 52.344 -70 29 07.87 – V C57
2021-01-23 09:44:07 s 1 -175742.10 2 +290837.42 7820.0 – C57
2021-01-23 09:54:07 S 06 02 50.736 -70 29 24.40 – V C57
2021-01-23 09:54:07 s 1 -175942.16 8 +290392.63 7490.0 – C57
2021-01-23 10:04:07 S 06 02 49.123 -70 29 40.49 – V C57
2021-01-23 10:04:07 s 1 -176141.59 7 +289946.80 6050.0 – C57
2021-01-23 10:14:07 S 06 02 47.544 -70 29 55.46 – V C57
2021-01-23 10:14:07 s 1 -176340.38 7 +289499.91 3520.0 – C57
2021-01-23 10:24:08 S 06 02 46.054 -70 30 11.30 – V C57
2021-01-23 10:24:08 s 1 -176538.53 4 +289051.97 9880.0 – C57
2021-01-23 10:34:07 S 06 02 44.441 -70 30 26.06 – V C57
2021-01-23 10:34:07 s 1 -176736.03 7 +288602.97 5120.0 – C57
2021-01-23 10:44:08 S 06 02 42.744 -70 30 42.05 – V C57
2021-01-23 10:44:08 s 1 -176932.89 4 +288152.92 9260.0 – C57
2021-01-23 10:54:07 S 06 02 41.074 -70 30 57.06 – V C57
2021-01-23 10:54:07 s 1 -177129.10 2 +287701.81 2270.0 – C57
2021-01-23 11:04:07 S 06 02 39.571 -70 31 14.09 – V C57
2021-01-23 11:04:07 s 1 -177324.65 8 +287249.64 4170.0 – C57
2021-01-23 11:14:07 S 06 02 38.134 -70 31 30.32 – V C57
2021-01-23 11:14:07 s 1 -177519.56 1 +286796.42 4930.0 – C57
2021-01-23 11:24:07 S 06 02 36.593 -70 31 46.09 – V C57
2021-01-23 11:24:07 s 1 -177713.80 8 +286342.13 4570.0 – 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)