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
2021-01-30 01:14:07 s 1 +124622.27 6 +268717.47 1050.0 – C57
2021-01-30 01:24:07 S 05 37 54.905 -74 51 58.79 – V C57
2021-01-30 01:24:07 s 1 +124367.94 7 +269257.46 6490.0 – C57
2021-01-30 01:34:07 S 05 37 52.241 -74 52 16.57 – V C57
2021-01-30 01:34:07 s 1 +124112.93 8 +269795.98 660.0 – C57
2021-01-30 01:44:07 S 05 37 48.972 -74 52 39.43 – V C57
2021-01-30 01:44:07 s 1 +123857.25 3 +270333.03 3550.0 – C57
2021-01-30 02:04:07 S 05 37 44.849 -74 53 07.51 – V C57
2021-01-30 02:04:07 s 1 +123343.87 1 +271402.72 5570.0 – C57
2021-01-30 02:14:07 S 05 37 42.259 -74 53 27.85 – V C57
2021-01-30 02:14:07 s 1 +123086.18 1 +271935.36 4710.0 – C57
2021-01-30 02:24:07 S 05 37 39.665 -74 53 44.59 – V C57
2021-01-30 02:24:07 s 1 +122827.83 2 +272466.55 2600.0 – C57
2021-01-30 02:34:07 S 05 37 37.212 -74 54 03.49 – V C57
2021-01-30 02:34:07 s 1 +122568.82 5 +272996.27 9270.0 – C57
2021-01-30 02:44:07 S 05 37 34.874 -74 54 21.10 – V C57
2021-01-30 02:44:07 s 1 +122309.16 6 +273524.54 4700.0 – C57
2021-01-30 02:54:07 S 05 37 32.105 -74 54 38.09 – V C57
2021-01-30 02:54:07 s 1 +122048.85 9 +274051.35 8920.0 – C57
2021-01-30 03:04:07 S 05 37 29.465 -74 54 55.91 – V C57
2021-01-30 03:04:07 s 1 +121787.90 5 +274576.71 1930.0 – C57
2021-01-30 03:14:07 S 05 37 27.132 -74 55 13.04 – V C57
2021-01-30 03:14:07 s 1 +121526.31 1 +275100.62 3730.0 – C57
2021-01-30 03:24:07 S 05 37 24.833 -74 55 30.86 – V C57
2021-01-30 03:24:07 s 1 +121264.07 9 +275623.08 4340.0 – C57
2021-01-30 03:34:07 S 05 37 22.181 -74 55 48.86 – V C57
2021-01-30 03:34:07 s 1 +121001.21 3 +276144.10 3750.0 – C57
2021-01-30 03:44:07 S 05 37 19.481 -74 56 06.32 – V C57
2021-01-30 03:44:07 s 1 +120737.71 6 +276663.67 1980.0 – C57
2021-01-30 03:54:07 S 05 37 17.138 -74 56 23.68 – V C57
2021-01-30 03:54:07 s 1 +120473.59 3 +277181.81 9030.0 – C57
2021-01-30 04:04:07 S 05 37 14.830 -74 56 41.96 – V C57
2021-01-30 04:04:07 s 1 +120208.84 7 +277698.51 4900.0 – C57
2021-01-30 04:14:07 S 05 37 12.062 -74 57 00.97 – V C57
2021-01-30 04:14:07 s 1 +119943.48 1 +278213.78 9620.0 – C57
2021-01-30 04:24:07 S 05 37 09.929 -74 57 16.56 – V C57
2021-01-30 04:24:07 s 1 +119677.49 9 +278727.61 3170.0 – C57
2021-01-30 04:34:07 S 05 37 06.974 -74 57 35.03 – V C57
2021-01-30 04:34:07 s 1 +119410.90 5 +279240.01 5570.0 – C57
2021-01-30 04:39:57 C 05 35 48.36 -74 43 09.7 – q 834
2021-01-30 04:44:07 S 05 37 04.601 -74 57 51.23 – V C57
2021-01-30 04:44:07 s 1 +119143.70 3 +279750.99 6830.0 – C57
2021-01-30 04:54:07 S 05 37 02.719 -74 58 09.19 – V C57
2021-01-30 04:54:07 s 1 +118875.89 5 +280260.54 6940.0 – C57
2021-01-30 05:04:07 S 05 36 59.762 -74 58 26.83 – V C57
2021-01-30 05:04:07 s 1 +118607.48 5 +280768.67 5920.0 – C57
2021-01-30 05:14:07 S 05 36 57.151 -74 58 45.05 – V C57
2021-01-30 05:14:07 s 1 +118338.47 7 +281275.39 3780.0 – C57
2021-01-30 05:24:07 S 05 36 54.595 -74 59 02.40 – V C57
2021-01-30 05:24:07 s 1 +118068.87 4 +281780.68 510.0 – 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)