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
2021-01-10 11:34:08 s 1 -179656.31 0 +274438.55 4940.0 – C57
2021-01-10 11:44:08 S 06 36 10.687 -60 55 54.62 – V C57
2021-01-10 11:44:08 s 1 -179820.79 2 +273944.09 1140.0 – C57
2021-01-10 11:54:08 S 06 36 09.799 -60 56 13.02 – V C57
2021-01-10 11:54:08 s 1 -179984.54 8 +273448.55 6160.0 – C57
2021-01-10 12:04:08 S 06 36 08.906 -60 56 32.24 – V C57
2021-01-10 12:04:08 s 1 -180147.57 7 +272951.92 10.0 – C57
2021-01-10 12:14:08 S 06 36 08.035 -60 56 50.75 – V C57
2021-01-10 12:14:08 s 1 -180309.87 4 +272454.20 2680.0 – C57
2021-01-10 12:24:08 S 06 36 07.171 -60 57 09.54 – V C57
2021-01-10 12:24:08 s 1 -180471.43 7 +271955.39 4150.0 – C57
2021-01-10 12:34:08 S 06 36 06.262 -60 57 28.80 – V C57
2021-01-10 12:34:08 s 1 -180632.26 4 +271455.49 4430.0 – C57
2021-01-10 12:44:08 S 06 36 05.311 -60 57 47.41 – V C57
2021-01-10 12:44:08 s 1 -180792.35 2 +270954.49 3510.0 – C57
2021-01-10 12:54:08 S 06 36 04.483 -60 58 06.02 – V C57
2021-01-10 12:54:08 s 1 -180951.69 8 +270452.40 1390.0 – C57
2021-01-10 13:04:08 S 06 36 03.722 -60 58 25.03 – V C57
2021-01-10 13:04:08 s 1 -181110.29 8 +269949.22 8060.0 – C57
2021-01-10 13:14:08 S 06 36 02.741 -60 58 44.04 – V C57
2021-01-10 13:14:08 s 1 -181268.15 1 +269444.94 3510.0 – C57
2021-01-10 13:24:08 S 06 36 01.649 -60 59 03.01 – V C57
2021-01-10 13:24:08 s 1 -181425.25 3 +268939.56 7750.0 – C57
2021-01-10 13:34:08 S 06 36 00.948 -60 59 21.70 – V C57
2021-01-10 13:34:08 s 1 -181581.60 1 +268433.08 770.0 – C57
2021-01-10 13:44:08 S 06 36 00.091 -60 59 40.67 – V C57
2021-01-10 13:44:08 s 1 -181737.19 2 +267925.50 2550.0 – C57
2021-01-10 13:54:08 S 06 35 59.052 -60 59 59.60 – V C57
2021-01-10 13:54:08 s 1 -181892.02 4 +267416.82 3100.0 – C57
2021-01-10 14:04:08 S 06 35 58.193 -61 00 19.22 – V C57
2021-01-10 14:04:08 s 1 -182046.09 3 +266907.03 2420.0 – C57
2021-01-10 14:14:08 S 06 35 57.310 -61 00 37.73 – V C57
2021-01-10 14:14:08 s 1 -182199.39 7 +266396.15 490.0 – C57
2021-01-10 14:24:08 S 06 35 56.412 -61 00 55.73 – V C57
2021-01-10 14:24:08 s 1 -182351.93 3 +265884.15 7310.0 – C57
2021-01-10 14:34:08 S 06 35 55.382 -61 01 15.24 – V C57
2021-01-10 14:34:08 s 1 -182503.69 7 +265371.05 2870.0 – C57
2021-01-10 14:44:08 S 06 35 54.626 -61 01 33.71 – V C57
2021-01-10 14:44:08 s 1 -182654.68 6 +264856.84 7180.0 – C57
2021-01-10 14:54:08 S 06 35 53.731 -61 01 52.39 – V C57
2021-01-10 14:54:08 s 1 -182804.89 8 +264341.52 220.0 – C57
2021-01-10 15:04:08 S 06 35 52.783 -61 02 11.44 – V C57
2021-01-10 15:04:08 s 1 -182954.33 0 +263825.09 2000.0 – C57
2021-01-10 15:14:08 S 06 35 51.917 -61 02 30.59 – V C57
2021-01-10 15:14:08 s 1 -183102.97 8 +263307.55 2490.0 – C57
2021-01-10 15:24:08 S 06 35 51.151 -61 02 48.12 – V C57
2021-01-10 15:24:08 s 1 -183250.83 9 +262788.89 1710.0 – C57
2021-01-10 15:34:08 S 06 35 50.165 -61 03 07.34 – V C57
2021-01-10 15:34:08 s 1 -183397.91 1 +262269.12 9650.0 – C57
2021-01-10 15:44:08 S 06 35 49.272 -61 03 26.10 – 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)