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
2021-01-31 06:44:07 s 1 +71841.902 0 +343341.51 880.0 – C57
2021-01-31 06:54:07 S 05 30 07.207 -75 42 43.96 – V C57
2021-01-31 06:54:07 s 1 +71512.235 0 +343653.16 2030.0 – C57
2021-01-31 07:04:07 S 05 30 04.930 -75 43 00.01 – V C57
2021-01-31 07:04:07 s 1 +71182.331 0 +343963.67 2710.0 – C57
2021-01-31 07:14:07 S 05 30 01.514 -75 43 17.47 – V C57
2021-01-31 07:14:07 s 1 +70852.191 0 +344273.03 2920.0 – C57
2021-01-31 07:24:07 S 05 29 58.658 -75 43 33.31 – V C57
2021-01-31 07:24:07 s 1 +70521.818 0 +344581.26 2660.0 – C57
2021-01-31 07:34:07 S 05 29 56.268 -75 43 51.06 – V C57
2021-01-31 07:34:07 s 1 +70191.212 0 +344888.34 1930.0 – C57
2021-01-31 07:44:07 S 05 29 53.314 -75 44 07.22 – V C57
2021-01-31 07:44:07 s 1 +69860.376 0 +345194.29 730.0 – C57
2021-01-31 07:54:07 S 05 29 50.393 -75 44 23.64 – V C57
2021-01-31 07:54:07 s 1 +69529.310 0 +345499.10 9070.0 – C57
2021-01-31 08:04:07 S 05 29 47.470 -75 44 40.13 – V C57
2021-01-31 08:04:07 s 1 +69198.016 0 +345802.78 6960.0 – C57
2021-01-31 08:14:07 S 05 29 44.556 -75 44 57.55 – V C57
2021-01-31 08:14:07 s 1 +68866.496 0 +346105.32 4380.0 – C57
2021-01-31 08:24:07 S 05 29 42.108 -75 45 14.00 – V C57
2021-01-31 08:24:07 s 1 +68534.752 0 +346406.72 1360.0 – C57
2021-01-31 08:34:07 S 05 29 39.362 -75 45 30.24 – V C57
2021-01-31 08:34:07 s 1 +68202.785 0 +346707.00 7880.0 – C57
2021-01-31 08:44:07 S 05 29 36.350 -75 45 46.51 – V C57
2021-01-31 08:44:07 s 1 +67870.596 0 +347006.14 3950.0 – C57
2021-01-31 08:54:07 S 05 29 33.403 -75 46 03.90 – V C57
2021-01-31 08:54:07 s 1 +67538.187 0 +347304.15 9580.0 – C57
2021-01-31 09:04:07 S 05 29 30.739 -75 46 20.46 – V C57
2021-01-31 09:04:07 s 1 +67205.559 0 +347601.04 4760.0 – C57
2021-01-31 09:14:07 S 05 29 27.780 -75 46 38.06 – V C57
2021-01-31 09:14:07 s 1 +66872.714 0 +347896.80 9510.0 – C57
2021-01-31 09:24:07 S 05 29 25.037 -75 46 54.01 – V C57
2021-01-31 09:24:07 s 1 +66539.654 0 +348191.43 3810.0 – C57
2021-01-31 09:34:07 S 05 29 22.416 -75 47 09.38 – V C57
2021-01-31 09:34:07 s 1 +66206.379 0 +348484.94 7680.0 – C57
2021-01-31 09:44:07 S 05 29 19.296 -75 47 28.97 – V C57
2021-01-31 09:44:07 s 1 +65872.892 0 +348777.32 1120.0 – C57
2021-01-31 09:54:07 S 05 29 16.627 -75 47 42.86 – V C57
2021-01-31 09:54:07 s 1 +65539.194 0 +349068.58 4130.0 – C57
2021-01-31 10:04:07 S 05 29 12.914 -75 48 01.08 – V C57
2021-01-31 10:04:07 s 1 +65205.286 0 +349358.72 6710.0 – C57
2021-01-31 10:14:07 S 05 29 12.499 -75 48 19.48 – V C57
2021-01-31 10:14:07 s 1 +64871.170 0 +349647.74 8870.0 – C57
2021-01-31 10:24:07 S 05 29 08.525 -75 48 31.86 – V C57
2021-01-31 10:24:07 s 1 +64536.848 0 +349935.64 600.0 – C57
2021-01-31 10:34:07 S 05 29 05.143 -75 48 48.96 – V C57
2021-01-31 10:34:07 s 1 +64202.320 0 +350222.43 1920.0 – C57
2021-01-31 10:44:07 S 05 29 02.486 -75 49 06.42 – V C57
2021-01-31 10:44:07 s 1 +63867.588 0 +350508.09 2820.0 – C57
2021-01-31 11:04:07 S 05 28 56.546 -75 49 40.73 – 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)