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
2021-01-24 00:24:07 S 06 00 32.040 -70 51 57.92 – V C57
2021-01-24 00:24:07 s 1 -190630.05 1 +247563.18 2090.0 – C57
2021-01-24 00:34:07 S 06 00 30.394 -70 52 13.30 – V C57
2021-01-24 00:34:07 s 1 -190763.95 4 +247022.00 7250.0 – C57
2021-01-24 00:44:07 S 06 00 28.754 -70 52 27.44 – V C57
2021-01-24 00:44:07 s 1 -190896.96 9 +246479.68 870.0 – C57
2021-01-24 00:54:07 S 06 00 27.235 -70 52 42.10 – V C57
2021-01-24 00:54:07 s 1 -191029.09 4 +245936.22 2940.0 – C57
2021-01-24 01:04:07 S 06 00 25.735 -70 52 58.44 – V C57
2021-01-24 01:04:07 s 1 -191160.32 3 +245391.61 3460.0 – C57
2021-01-24 01:14:07 S 06 00 24.132 -70 53 14.10 – V C57
2021-01-24 01:14:07 s 1 -191290.65 5 +244845.84 2410.0 – C57
2021-01-24 01:24:07 S 06 00 22.382 -70 53 29.08 – V C57
2021-01-24 01:24:07 s 1 -191420.08 5 +244298.93 9790.0 – C57
2021-01-24 01:34:07 S 06 00 20.743 -70 53 44.23 – V C57
2021-01-24 01:34:07 s 1 -191548.60 9 +243750.87 5600.0 – C57
2021-01-24 01:44:07 S 06 00 19.042 -70 54 00.36 – V C57
2021-01-24 01:44:07 s 1 -191676.22 4 +243201.66 9830.0 – C57
2021-01-24 01:54:07 S 06 00 17.724 -70 54 15.73 – V C57
2021-01-24 01:54:07 s 1 -191802.92 7 +242651.29 2480.0 – C57
2021-01-24 02:04:07 S 06 00 16.085 -70 54 29.77 – V C57
2021-01-24 02:04:07 s 1 -191928.71 3 +242099.77 3520.0 – C57
2021-01-24 02:14:07 S 06 00 14.441 -70 54 46.04 – V C57
2021-01-24 02:14:07 s 1 -192053.57 9 +241547.10 2970.0 – C57
2021-01-24 02:24:07 S 06 00 12.857 -70 55 02.21 – V C57
2021-01-24 02:24:07 s 1 -192177.52 1 +240993.26 810.0 – C57
2021-01-24 02:34:07 S 06 00 11.350 -70 55 16.82 – V C57
2021-01-24 02:34:07 s 1 -192300.53 5 +240438.27 7040.0 – C57
2021-01-24 02:44:07 S 06 00 09.823 -70 55 31.15 – V C57
2021-01-24 02:44:07 s 1 -192422.61 8 +239882.12 1640.0 – C57
2021-01-24 02:54:07 S 06 00 08.198 -70 55 46.45 – V C57
2021-01-24 02:54:07 s 1 -192543.76 6 +239324.81 4620.0 – C57
2021-01-24 03:04:07 S 06 00 06.538 -70 56 01.21 – V C57
2021-01-24 03:04:07 s 1 -192663.97 5 +238766.34 5960.0 – C57
2021-01-24 03:14:07 S 06 00 04.721 -70 56 17.20 – V C57
2021-01-24 03:14:07 s 1 -192783.24 1 +238206.70 5660.0 – C57
2021-01-24 03:24:07 S 06 00 03.274 -70 56 32.24 – V C57
2021-01-24 03:24:07 s 1 -192901.56 0 +237645.90 3710.0 – C57
2021-01-24 03:34:07 S 06 00 01.838 -70 56 47.90 – V C57
2021-01-24 03:34:07 s 1 -193018.92 9 +237083.93 110.0 – C57
2021-01-24 03:44:07 S 06 00 00.137 -70 57 02.05 – V C57
2021-01-24 03:44:07 s 1 -193135.34 3 +236520.79 4840.0 – C57
2021-01-24 03:54:07 S 05 59 58.356 -70 57 17.89 – V C57
2021-01-24 03:54:07 s 1 -193250.79 9 +235956.49 7910.0 – C57
2021-01-24 04:04:07 S 05 59 56.904 -70 57 32.65 – V C57
2021-01-24 04:04:07 s 1 -193365.29 2 +235391.02 9300.0 – C57
2021-01-24 04:14:07 S 05 59 55.270 -70 57 48.35 – V C57
2021-01-24 04:14:07 s 1 -193478.81 9 +234824.37 9000.0 – C57
2021-01-24 04:24:07 S 05 59 53.462 -70 58 02.57 – V C57
2021-01-24 04:24:07 s 1 -193591.37 6 +234256.56 7010.0 – 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)