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 05:34:07 S 06 07 17.220 -69 43 37.52 – V C57
2021-01-22 05:34:07 s 1 -134353.47 3 +351522.06 2690.0 – C57
2021-01-22 05:44:08 S 06 07 15.547 -69 43 53.08 – V C57
2021-01-22 05:44:08 s 1 -134634.92 1 +351244.65 1560.0 – C57
2021-01-22 05:54:08 S 06 07 13.874 -69 44 09.20 – V C57
2021-01-22 05:54:08 s 1 -134916.01 2 +350966.31 9810.0 – C57
2021-01-22 06:04:08 S 06 07 12.238 -69 44 25.48 – V C57
2021-01-22 06:04:08 s 1 -135196.74 5 +350687.02 7470.0 – C57
2021-01-22 06:14:08 S 06 07 10.658 -69 44 42.22 – V C57
2021-01-22 06:14:08 s 1 -135477.12 0 +350406.78 4510.0 – C57
2021-01-22 06:24:08 S 06 07 09.454 -69 44 59.89 – V C57
2021-01-22 06:24:08 s 1 -135757.13 4 +350125.60 940.0 – C57
2021-01-22 06:34:08 S 06 07 08.026 -69 45 16.60 – V C57
2021-01-22 06:34:08 s 1 -136036.78 7 +349843.48 6760.0 – C57
2021-01-22 06:44:07 S 06 07 06.341 -69 45 32.65 – V C57
2021-01-22 06:44:07 s 1 -136316.07 7 +349560.41 1970.0 – C57
2021-01-22 06:54:08 S 06 07 04.632 -69 45 49.00 – V C57
2021-01-22 06:54:08 s 1 -136595.00 3 +349276.39 6560.0 – C57
2021-01-22 07:04:07 S 06 07 03.026 -69 46 04.33 – V C57
2021-01-22 07:04:07 s 1 -136873.56 5 +348991.43 530.0 – C57
2021-01-22 07:14:08 S 06 07 01.466 -69 46 20.64 – V C57
2021-01-22 07:14:08 s 1 -137151.75 9 +348705.52 3870.0 – C57
2021-01-22 07:24:08 S 06 07 00.036 -69 46 37.63 – V C57
2021-01-22 07:24:08 s 1 -137429.58 6 +348418.66 6600.0 – C57
2021-01-22 07:34:08 S 06 06 58.524 -69 46 55.02 – V C57
2021-01-22 07:34:08 s 1 -137707.04 5 +348130.86 8690.0 – C57
2021-01-22 07:44:08 S 06 06 57.055 -69 47 10.90 – V C57
2021-01-22 07:44:08 s 1 -137984.13 2 +347842.11 160.0 – C57
2021-01-22 07:54:08 S 06 06 55.457 -69 47 28.50 – V C57
2021-01-22 07:54:08 s 1 -138260.84 9 +347552.41 1000.0 – C57
2021-01-22 08:04:08 S 06 06 53.779 -69 47 44.09 – V C57
2021-01-22 08:04:08 s 1 -138537.19 3 +347261.76 1210.0 – C57
2021-01-22 08:14:07 S 06 06 52.205 -69 48 00.50 – V C57
2021-01-22 08:14:07 s 1 -138813.16 2 +346970.16 780.0 – C57
2021-01-22 08:24:08 S 06 06 50.582 -69 48 16.27 – V C57
2021-01-22 08:24:08 s 1 -139088.75 7 +346677.62 9710.0 – C57
2021-01-22 08:34:07 S 06 06 49.205 -69 48 34.85 – V C57
2021-01-22 08:34:07 s 1 -139363.97 5 +346384.12 8010.0 – C57
2021-01-22 08:44:08 S 06 06 47.789 -69 48 50.58 – V C57
2021-01-22 08:44:08 s 1 -139638.81 5 +346089.67 5660.0 – C57
2021-01-22 08:54:08 S 06 06 46.133 -69 49 06.71 – V C57
2021-01-22 08:54:08 s 1 -139913.27 6 +345794.27 2670.0 – C57
2021-01-22 09:04:08 S 06 06 44.642 -69 49 22.87 – V C57
2021-01-22 09:04:08 s 1 -140187.35 6 +345497.92 9030.0 – C57
2021-01-22 09:14:08 S 06 06 43.066 -69 49 40.44 – V C57
2021-01-22 09:14:08 s 1 -140461.05 5 +345200.62 4750.0 – C57
2021-01-22 09:24:07 S 06 06 41.388 -69 49 56.60 – V C57
2021-01-22 09:24:07 s 1 -140734.37 0 +344902.36 9810.0 – C57
2021-01-22 09:34:08 S 06 06 39.869 -69 50 12.05 – V C57
2021-01-22 09:34:08 s 1 -141007.30 2 +344603.15 4220.0 – 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)