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
2021-01-15 02:34:08 s 1 +147712.21 7 +99159.774 2440.0 – C57
2021-01-15 02:44:08 S 06 28 51.624 -64 21 02.92 – V C57
2021-01-15 02:44:08 s 1 +147839.06 4 +100144.81 7160.0 – C57
2021-01-15 02:54:08 S 06 28 50.645 -64 21 24.01 – V C57
2021-01-15 02:54:08 s 1 +147962.28 8 +101127.39 5690.0 – C57
2021-01-15 03:04:08 S 06 28 49.903 -64 21 45.32 – V C57
2021-01-15 03:04:08 s 1 +148081.92 4 +102107.52 8090.0 – C57
2021-01-15 03:24:08 S 06 28 48.310 -64 22 27.98 – V C57
2021-01-15 03:24:08 s 1 +148310.57 7 +104060.43 4730.0 – C57
2021-01-15 03:34:08 S 06 28 47.350 -64 22 49.73 – V C57
2021-01-15 03:34:08 s 1 +148419.66 2 +105033.22 9100.0 – C57
2021-01-15 03:44:08 S 06 28 46.685 -64 23 11.69 – V C57
2021-01-15 03:44:08 s 1 +148525.29 9 +106003.56 7560.0 – C57
2021-01-15 03:54:08 S 06 28 45.732 -64 23 33.04 – V C57
2021-01-15 03:54:08 s 1 +148627.52 1 +106971.47 200.0 – C57
2021-01-15 04:04:08 S 06 28 44.844 -64 23 54.06 – V C57
2021-01-15 04:04:08 s 1 +148726.36 1 +107936.94 7040.0 – C57
2021-01-15 04:14:08 S 06 28 44.136 -64 24 16.56 – V C57
2021-01-15 04:14:08 s 1 +148821.85 2 +108899.98 8170.0 – C57
2021-01-15 04:34:08 S 06 28 42.302 -64 24 58.86 – V C57
2021-01-15 04:34:08 s 1 +149002.91 4 +110818.78 3460.0 – C57
2021-01-15 04:44:08 S 06 28 41.438 -64 25 20.17 – V C57
2021-01-15 04:44:08 s 1 +149088.54 9 +111774.55 7730.0 – C57
2021-01-15 04:54:08 S 06 28 40.858 -64 25 42.10 – V C57
2021-01-15 04:54:08 s 1 +149170.96 1 +112727.90 6490.0 – C57
2021-01-15 05:04:08 S 06 28 39.809 -64 26 03.66 – V C57
2021-01-15 05:04:08 s 1 +149250.18 1 +113678.83 9800.0 – C57
2021-01-15 05:14:08 S 06 28 38.954 -64 26 24.40 – V C57
2021-01-15 05:14:08 s 1 +149326.23 9 +114627.36 7690.0 – C57
2021-01-15 05:24:08 S 06 28 38.323 -64 26 47.47 – V C57
2021-01-15 05:24:08 s 1 +149399.16 4 +115573.49 240.0 – C57
2021-01-15 05:44:08 S 06 28 36.406 -64 27 29.56 – V C57
2021-01-15 05:44:08 s 1 +149535.73 5 +117458.54 9450.0 – C57
2021-01-15 05:54:08 S 06 28 35.712 -64 27 49.97 – V C57
2021-01-15 05:54:08 s 1 +149599.43 8 +118397.47 6220.0 – C57
2021-01-15 06:04:08 S 06 28 34.867 -64 28 12.94 – V C57
2021-01-15 06:04:08 s 1 +149660.12 5 +119334.02 7840.0 – C57
2021-01-15 06:14:08 S 06 28 33.857 -64 28 33.96 – V C57
2021-01-15 06:14:08 s 1 +149717.82 2 +120268.19 4340.0 – C57
2021-01-15 06:24:08 S 06 28 32.938 -64 28 54.91 – V C57
2021-01-15 06:24:08 s 1 +149772.55 8 +121199.97 5770.0 – C57
2021-01-15 06:34:08 S 06 28 32.330 -64 29 16.91 – V C57
2021-01-15 06:34:08 s 1 +149824.35 9 +122129.39 2190.0 – C57
2021-01-15 06:54:08 S 06 28 30.516 -64 29 59.03 – V C57
2021-01-15 06:54:08 s 1 +149919.26 7 +123981.11 150.0 – C57
2021-01-15 07:04:08 S 06 28 29.748 -64 30 21.10 – V C57
2021-01-15 07:04:08 s 1 +149962.42 6 +124903.43 1780.0 – C57
2021-01-15 07:14:08 S 06 28 28.877 -64 30 43.06 – V C57
2021-01-15 07:14:08 s 1 +150002.75 6 +125823.39 8580.0 – C57
2021-01-15 07:24:08 S 06 28 27.866 -64 31 04.37 – 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)