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
2021-01-25 18:34:07 S 05 53 58.375 -71 53 47.62 – V C57
2021-01-25 18:34:07 s 1 -181249.74 0 +70617.355 1400.0 – C57
2021-01-25 18:44:07 S 05 53 56.940 -71 54 00.61 – V C57
2021-01-25 18:44:07 s 1 -180942.48 0 +69747.479 4930.0 – C57
2021-01-25 18:54:07 S 05 53 55.358 -71 54 13.97 – V C57
2021-01-25 18:54:07 s 1 -180631.79 9 +68876.292 2320.0 – C57
2021-01-25 19:04:07 S 05 53 53.846 -71 54 27.94 – V C57
2021-01-25 19:04:07 s 1 -180317.67 4 +68003.798 3530.0 – C57
2021-01-25 19:14:07 S 05 53 52.493 -71 54 43.02 – V C57
2021-01-25 19:14:07 s 1 -180000.07 7 +67130.002 8510.0 – C57
2021-01-25 19:24:07 S 05 53 51.127 -71 54 57.71 – V C57
2021-01-25 19:24:07 s 1 -179678.98 4 +66254.907 7210.0 – C57
2021-01-25 19:34:07 S 05 53 49.706 -71 55 10.20 – V C57
2021-01-25 19:34:07 s 1 -179354.36 6 +65378.519 9580.0 – C57
2021-01-25 19:44:07 S 05 53 48.190 -71 55 23.77 – V C57
2021-01-25 19:44:07 s 1 -179026.19 8 +64500.844 5580.0 – C57
2021-01-25 19:54:07 S 05 53 46.658 -71 55 38.57 – V C57
2021-01-25 19:54:07 s 1 -178694.45 3 +63621.886 5150.0 – C57
2021-01-25 20:04:07 S 05 53 45.115 -71 55 51.28 – V C57
2021-01-25 20:04:07 s 1 -178359.10 2 +62741.650 8250.0 – C57
2021-01-25 20:14:07 S 05 53 43.990 -71 56 05.42 – V C57
2021-01-25 20:14:07 s 1 -178020.11 9 +61860.143 4830.0 – C57
2021-01-25 20:24:07 S 05 53 42.595 -71 56 19.43 – V C57
2021-01-25 20:24:07 s 1 -177677.47 5 +60977.370 4820.0 – C57
2021-01-25 20:34:07 S 05 53 41.033 -71 56 34.44 – V C57
2021-01-25 20:34:07 s 1 -177331.14 3 +60093.337 8190.0 – C57
2021-01-25 20:44:07 S 05 53 39.581 -71 56 45.64 – V C57
2021-01-25 20:44:07 s 1 -176981.09 2 +59208.051 4880.0 – C57
2021-01-25 21:04:07 S 05 53 35.486 -71 57 10.69 – V C57
2021-01-25 21:04:07 s 1 -176269.72 2 +57433.743 8010.0 – C57
2021-01-25 21:24:07 S 05 53 34.200 -71 57 43.02 – V C57
2021-01-25 21:24:07 s 1 -175543.13 1 +55654.499 3780.0 – C57
2021-01-25 21:34:07 S 05 53 32.434 -71 57 56.81 – V C57
2021-01-25 21:34:07 s 1 -175174.05 2 +54763.045 6270.0 – C57
2021-01-25 21:44:07 S 05 53 31.032 -71 58 11.42 – V C57
2021-01-25 21:44:07 s 1 -174801.07 7 +53870.378 1750.0 – C57
2021-01-25 21:54:07 S 05 53 29.926 -71 58 25.07 – V C57
2021-01-25 21:54:07 s 1 -174424.17 5 +52976.507 170.0 – C57
2021-01-25 22:04:07 S 05 53 28.270 -71 58 38.71 – V C57
2021-01-25 22:04:07 s 1 -174043.31 4 +52081.440 1470.0 – C57
2021-01-25 22:14:07 S 05 53 27.223 -71 58 53.69 – V C57
2021-01-25 22:14:07 s 1 -173658.46 4 +51185.184 5590.0 – C57
2021-01-25 22:24:07 S 05 53 25.800 -71 59 07.37 – V C57
2021-01-25 22:24:07 s 1 -173269.59 1 +50287.749 2470.0 – C57
2021-01-25 22:34:07 S 05 53 24.314 -71 59 20.44 – V C57
2021-01-25 22:34:07 s 1 -172876.66 5 +49389.142 2070.0 – C57
2021-01-25 22:44:07 S 05 53 22.865 -71 59 34.26 – V C57
2021-01-25 22:44:07 s 1 -172479.65 1 +48489.374 4300.0 – C57
2021-01-25 22:54:07 S 05 53 21.286 -71 59 48.30 – V C57
2021-01-25 22:54:07 s 1 -172078.51 7 +47588.453 9130.0 – 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)