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
2020-12-25 07:44:08 S 06 58 24.163 -46 25 16.03 – V C57
2020-12-25 07:44:08 s 1 -90354.424 0 +388226.05 8280.0 – C57
2020-12-25 07:54:08 S 06 58 23.750 -46 25 40.37 – V C57
2020-12-25 07:54:08 s 1 -90671.717 0 +388062.06 1490.0 – C57
2020-12-25 08:04:08 S 06 58 23.318 -46 26 05.93 – V C57
2020-12-25 08:04:08 s 1 -90988.804 0 +387897.19 4360.0 – C57
2020-12-25 08:14:08 S 06 58 22.836 -46 26 29.72 – V C57
2020-12-25 08:14:08 s 1 -91305.685 0 +387731.44 6890.0 – C57
2020-12-25 08:24:08 S 06 58 22.418 -46 26 54.53 – V C57
2020-12-25 08:24:08 s 1 -91622.357 0 +387564.82 9080.0 – C57
2020-12-25 08:34:08 S 06 58 22.042 -46 27 18.58 – V C57
2020-12-25 08:34:08 s 1 -91938.821 0 +387397.32 930.0 – C57
2020-12-25 08:44:08 S 06 58 21.535 -46 27 43.67 – V C57
2020-12-25 08:44:08 s 1 -92255.076 0 +387228.94 2440.0 – C57
2020-12-25 08:54:08 S 06 58 20.981 -46 28 08.22 – V C57
2020-12-25 08:54:08 s 1 -92571.120 0 +387059.68 3600.0 – C57
2020-12-25 09:04:08 S 06 58 20.556 -46 28 32.99 – V C57
2020-12-25 09:04:08 s 1 -92886.952 0 +386889.54 4420.0 – C57
2020-12-25 09:14:08 S 06 58 20.244 -46 28 57.50 – V C57
2020-12-25 09:14:08 s 1 -93202.573 0 +386718.52 4890.0 – C57
2020-12-25 09:24:08 S 06 58 19.822 -46 29 23.35 – V C57
2020-12-25 09:24:08 s 1 -93517.980 0 +386546.62 5020.0 – C57
2020-12-25 09:34:08 S 06 58 19.210 -46 29 46.50 – V C57
2020-12-25 09:34:08 s 1 -93833.174 0 +386373.84 4790.0 – C57
2020-12-25 09:44:08 S 06 58 18.883 -46 30 11.23 – V C57
2020-12-25 09:44:08 s 1 -94148.153 0 +386200.18 4220.0 – C57
2020-12-25 09:54:08 S 06 58 18.384 -46 30 35.64 – V C57
2020-12-25 09:54:08 s 1 -94462.916 0 +386025.65 3290.0 – C57
2020-12-25 10:04:08 S 06 58 17.902 -46 31 01.20 – V C57
2020-12-25 10:04:08 s 1 -94777.462 0 +385850.23 2020.0 – C57
2020-12-25 10:14:08 S 06 58 17.424 -46 31 26.00 – V C57
2020-12-25 10:14:08 s 1 -95091.791 0 +385673.93 390.0 – C57
2020-12-25 10:24:08 S 06 58 16.980 -46 31 50.20 – V C57
2020-12-25 10:24:08 s 1 -95405.901 0 +385496.75 8400.0 – C57
2020-12-25 10:34:08 S 06 58 16.610 -46 32 14.78 – V C57
2020-12-25 10:34:08 s 1 -95719.793 0 +385318.69 6060.0 – C57
2020-12-25 10:44:08 S 06 58 16.140 -46 32 38.94 – V C57
2020-12-25 10:44:08 s 1 -96033.464 0 +385139.75 3350.0 – C57
2020-12-25 10:54:08 S 06 58 15.694 -46 33 03.56 – V C57
2020-12-25 10:54:08 s 1 -96346.913 0 +384959.93 290.0 – C57
2020-12-25 11:04:08 S 06 58 15.223 -46 33 28.40 – V C57
2020-12-25 11:04:08 s 1 -96660.141 0 +384779.22 6870.0 – C57
2020-12-25 11:14:08 S 06 58 14.743 -46 33 53.21 – V C57
2020-12-25 11:14:08 s 1 -96973.146 0 +384597.64 3090.0 – C57
2020-12-25 11:24:08 S 06 58 14.275 -46 34 17.94 – V C57
2020-12-25 11:24:08 s 1 -97285.927 0 +384415.17 8950.0 – C57
2020-12-25 11:34:08 S 06 58 13.750 -46 34 42.17 – V C57
2020-12-25 11:34:08 s 1 -97598.484 0 +384231.82 4440.0 – C57
2020-12-25 11:44:08 S 06 58 13.409 -46 35 06.54 – V C57
2020-12-25 11:44:08 s 1 -97910.815 0 +384047.58 9570.0 – 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)