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
2021-01-12 17:14:08 s 1 -167340.15 2 +50647.273 4330.0 – C57
2021-01-12 17:24:08 S 06 31 34.387 -62 31 57.76 – V C57
2021-01-12 17:24:08 s 1 -166930.75 0 +49727.893 6250.0 – C57
2021-01-12 17:34:08 S 06 31 33.482 -62 32 14.39 – V C57
2021-01-12 17:34:08 s 1 -166516.99 2 +48807.224 760.0 – C57
2021-01-12 17:44:08 S 06 31 33.451 -62 32 30.88 – V C57
2021-01-12 17:44:08 s 1 -166098.83 9 +47885.277 7780.0 – C57
2021-01-12 17:54:08 S 06 31 31.882 -62 32 48.59 – V C57
2021-01-12 17:54:08 s 1 -165676.25 2 +46962.062 7250.0 – C57
2021-01-12 18:04:08 S 06 31 31.363 -62 33 04.97 – V C57
2021-01-12 18:04:08 s 1 -165249.19 1 +46037.587 9100.0 – C57
2021-01-12 18:14:08 S 06 31 30.756 -62 33 21.92 – V C57
2021-01-12 18:14:08 s 1 -164817.61 8 +45111.865 3260.0 – C57
2021-01-12 18:24:08 S 06 31 29.827 -62 33 38.70 – V C57
2021-01-12 18:24:08 s 1 -164381.49 2 +44184.907 9670.0 – C57
2021-01-12 18:34:08 S 06 31 29.170 -62 33 55.26 – V C57
2021-01-12 18:34:08 s 1 -163940.77 1 +43256.722 8250.0 – C57
2021-01-12 18:44:08 S 06 31 28.306 -62 34 12.07 – V C57
2021-01-12 18:44:08 s 1 -163495.41 5 +42327.324 8940.0 – C57
2021-01-12 18:54:08 S 06 31 27.775 -62 34 28.45 – V C57
2021-01-12 18:54:08 s 1 -163045.38 1 +41396.724 1650.0 – C57
2021-01-12 19:04:08 S 06 31 27.110 -62 34 44.94 – V C57
2021-01-12 19:04:08 s 1 -162590.62 8 +40464.935 6330.0 – C57
2021-01-12 19:14:08 S 06 31 26.198 -62 35 01.61 – V C57
2021-01-12 19:14:08 s 1 -162131.11 2 +39531.970 2890.0 – C57
2021-01-12 19:24:08 S 06 31 25.387 -62 35 18.17 – V C57
2021-01-12 19:24:08 s 1 -161666.78 9 +38597.843 1260.0 – C57
2021-01-12 19:34:08 S 06 31 24.806 -62 35 34.55 – V C57
2021-01-12 19:34:08 s 1 -161197.61 7 +37662.566 1370.0 – C57
2021-01-12 19:44:08 S 06 31 24.221 -62 35 50.17 – V C57
2021-01-12 19:44:08 s 1 -160723.55 0 +36726.155 3140.0 – C57
2021-01-12 19:54:08 S 06 31 23.690 -62 36 05.87 – V C57
2021-01-12 19:54:08 s 1 -160244.54 3 +35788.624 6480.0 – C57
2021-01-12 20:04:08 S 06 31 22.027 -62 36 27.18 – V C57
2021-01-12 20:04:08 s 1 -159760.55 0 +34849.989 1330.0 – C57
2021-01-12 20:14:08 S 06 31 21.518 -62 36 40.07 – V C57
2021-01-12 20:14:08 s 1 -159271.52 6 +33910.265 7610.0 – C57
2021-01-12 20:24:08 S 06 31 21.062 -62 36 57.42 – V C57
2021-01-12 20:24:08 s 1 -158777.42 2 +32969.469 5230.0 – C57
2021-01-12 20:34:08 S 06 31 20.546 -62 37 14.41 – V C57
2021-01-12 20:34:08 s 1 -158278.19 2 +32027.617 4110.0 – C57
2021-01-12 20:44:08 S 06 31 19.908 -62 37 31.15 – V C57
2021-01-12 20:44:08 s 1 -157773.78 8 +31084.727 4170.0 – C57
2021-01-12 20:54:08 S 06 31 19.066 -62 37 46.16 – V C57
2021-01-12 20:54:08 s 1 -157264.16 1 +30140.816 5320.0 – C57
2021-01-12 21:04:08 S 06 31 18.406 -62 38 04.38 – V C57
2021-01-12 21:04:08 s 1 -156749.26 1 +29195.904 7490.0 – C57
2021-01-12 21:14:08 S 06 31 17.731 -62 38 19.93 – V C57
2021-01-12 21:14:08 s 1 -156229.03 8 +28250.009 580.0 – C57
2021-01-12 21:24:08 S 06 31 17.071 -62 38 37.03 – 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)