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
2021-01-17 08:54:08 s 1 +95775.698 0 +315926.00 3650.0 – C57
2021-01-17 09:04:08 S 06 23 16.608 -66 12 51.34 – V C57
2021-01-17 09:04:08 s 1 +95477.489 0 +316336.79 7100.0 – C57
2021-01-17 09:14:08 S 06 23 15.326 -66 13 10.81 – V C57
2021-01-17 09:14:08 s 1 +95178.890 0 +316746.32 9860.0 – C57
2021-01-17 09:24:08 S 06 23 13.970 -66 13 29.86 – V C57
2021-01-17 09:24:08 s 1 +94879.903 0 +317154.60 1930.0 – C57
2021-01-17 09:34:08 S 06 23 13.010 -66 13 50.63 – V C57
2021-01-17 09:34:08 s 1 +94580.530 0 +317561.63 3330.0 – C57
2021-01-17 09:44:08 S 06 23 11.868 -66 14 10.61 – V C57
2021-01-17 09:44:08 s 1 +94280.772 0 +317967.41 4040.0 – C57
2021-01-17 09:54:08 S 06 23 10.524 -66 14 29.69 – V C57
2021-01-17 09:54:08 s 1 +93980.633 0 +318371.94 4090.0 – C57
2021-01-17 10:04:08 S 06 23 09.238 -66 14 48.84 – V C57
2021-01-17 10:04:08 s 1 +93680.115 0 +318775.23 3460.0 – C57
2021-01-17 10:14:08 S 06 23 08.179 -66 15 08.14 – V C57
2021-01-17 10:14:08 s 1 +93379.219 0 +319177.27 2170.0 – C57
2021-01-17 10:24:08 S 06 23 07.073 -66 15 28.37 – V C57
2021-01-17 10:24:08 s 1 +93077.948 0 +319578.07 210.0 – C57
2021-01-17 10:34:08 S 06 23 05.952 -66 15 48.56 – V C57
2021-01-17 10:34:08 s 1 +92776.304 0 +319977.62 7600.0 – C57
2021-01-17 10:44:08 S 06 23 04.651 -66 16 07.39 – V C57
2021-01-17 10:44:08 s 1 +92474.289 0 +320375.94 4330.0 – C57
2021-01-17 10:54:08 S 06 23 03.389 -66 16 27.19 – V C57
2021-01-17 10:54:08 s 1 +92171.905 0 +320773.02 410.0 – C57
2021-01-17 11:04:08 S 06 23 02.215 -66 16 45.34 – V C57
2021-01-17 11:04:08 s 1 +91869.154 0 +321168.87 5840.0 – C57
2021-01-17 11:14:08 S 06 23 01.195 -66 17 06.40 – V C57
2021-01-17 11:14:08 s 1 +91566.039 0 +321563.48 630.0 – C57
2021-01-17 11:24:08 S 06 23 00.156 -66 17 26.05 – V C57
2021-01-17 11:24:08 s 1 +91262.561 0 +321956.86 4780.0 – C57
2021-01-17 11:34:08 S 06 22 58.714 -66 17 44.95 – V C57
2021-01-17 11:34:08 s 1 +90958.722 0 +322349.01 8290.0 – C57
2021-01-17 11:44:08 S 06 22 57.506 -66 18 03.67 – V C57
2021-01-17 11:44:08 s 1 +90654.526 0 +322739.93 1160.0 – C57
2021-01-17 11:54:08 S 06 22 56.458 -66 18 24.23 – V C57
2021-01-17 11:54:08 s 1 +90349.972 0 +323129.62 3410.0 – C57
2021-01-17 12:34:08 S 06 22 51.379 -66 19 42.38 – V C57
2021-01-17 12:34:08 s 1 +89128.236 0 +324676.16 6160.0 – C57
2021-01-17 12:44:08 S 06 22 50.417 -66 20 02.65 – V C57
2021-01-17 12:44:08 s 1 +88821.932 0 +325059.75 5300.0 – C57
2021-01-17 12:54:08 S 06 22 49.478 -66 20 22.74 – V C57
2021-01-17 12:54:08 s 1 +88515.283 0 +325442.12 3840.0 – C57
2021-01-17 13:04:08 S 06 22 48.096 -66 20 42.22 – V C57
2021-01-17 13:04:08 s 1 +88208.291 0 +325823.27 1770.0 – C57
2021-01-17 13:14:08 S 06 22 46.692 -66 21 01.58 – V C57
2021-01-17 13:14:08 s 1 +87900.960 0 +326203.21 9100.0 – C57
2021-01-17 13:24:08 S 06 22 45.744 -66 21 20.30 – V C57
2021-01-17 13:24:08 s 1 +87593.290 0 +326581.94 5830.0 – C57
2021-01-17 13:34:08 S 06 22 44.306 -66 21 40.46 – 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)