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
2021-01-09 01:04:08 S 06 39 14.971 -59 48 20.63 – V C57
2021-01-09 01:04:08 s 1 -133277.06 6 +354910.89 9400.0 – C57
2021-01-09 01:14:08 S 06 39 14.215 -59 48 39.53 – V C57
2021-01-09 01:14:08 s 1 -133547.64 3 +354620.98 3560.0 – C57
2021-01-09 01:24:08 S 06 39 13.325 -59 49 00.12 – V C57
2021-01-09 01:24:08 s 1 -133817.86 5 +354330.16 7180.0 – C57
2021-01-09 01:34:08 S 06 39 12.410 -59 49 19.81 – V C57
2021-01-09 01:34:08 s 1 -134087.73 3 +354038.42 260.0 – C57
2021-01-09 01:44:08 S 06 39 11.484 -59 49 39.97 – V C57
2021-01-09 01:44:08 s 1 -134357.24 4 +353745.76 2780.0 – C57
2021-01-09 01:54:08 S 06 39 10.829 -59 49 59.48 – V C57
2021-01-09 01:54:08 s 1 -134626.39 7 +353452.19 4760.0 – C57
2021-01-09 02:04:08 S 06 39 09.785 -59 50 20.44 – V C57
2021-01-09 02:04:08 s 1 -134895.19 1 +353157.70 6190.0 – C57
2021-01-09 02:14:08 S 06 39 08.923 -59 50 39.52 – V C57
2021-01-09 02:14:08 s 1 -135163.62 5 +352862.29 7060.0 – C57
2021-01-09 02:14:13 C 06 39 36.55 -59 33 42.2 – o K95
2021-01-09 02:24:08 S 06 39 08.170 -59 50 59.28 – V C57
2021-01-09 02:24:08 s 1 -135431.69 9 +352565.97 7370.0 – C57
2021-01-09 02:34:08 S 06 39 07.123 -59 51 20.23 – V C57
2021-01-09 02:34:08 s 1 -135699.40 9 +352268.72 7130.0 – C57
2021-01-09 02:44:08 S 06 39 06.216 -59 51 40.28 – V C57
2021-01-09 02:44:08 s 1 -135966.75 6 +351970.56 6330.0 – C57
2021-01-09 02:54:08 S 06 39 05.450 -59 51 59.58 – V C57
2021-01-09 02:54:08 s 1 -136233.73 9 +351671.48 4960.0 – C57
2021-01-09 03:04:08 S 06 39 04.642 -59 52 19.92 – V C57
2021-01-09 03:04:08 s 1 -136500.35 5 +351371.48 3030.0 – C57
2021-01-09 03:14:08 S 06 39 03.703 -59 52 40.04 – V C57
2021-01-09 03:14:08 s 1 -136766.60 4 +351070.55 540.0 – C57
2021-01-09 03:24:08 S 06 39 02.779 -59 52 59.77 – V C57
2021-01-09 03:24:08 s 1 -137032.48 4 +350768.71 7470.0 – C57
2021-01-09 03:34:08 S 06 39 01.922 -59 53 19.36 – V C57
2021-01-09 03:34:08 s 1 -137297.99 5 +350465.94 3840.0 – C57
2021-01-09 03:44:08 S 06 39 00.965 -59 53 40.24 – V C57
2021-01-09 03:44:08 s 1 -137563.13 4 +350162.25 9640.0 – C57
2021-01-09 03:54:08 S 06 39 00.276 -59 53 59.42 – V C57
2021-01-09 03:54:08 s 1 -137827.90 2 +349857.64 4860.0 – C57
2021-01-09 04:04:08 S 06 38 59.448 -59 54 18.79 – V C57
2021-01-09 04:04:08 s 1 -138092.29 6 +349552.11 9500.0 – C57
2021-01-09 04:14:08 S 06 38 58.469 -59 54 39.13 – V C57
2021-01-09 04:14:08 s 1 -138356.31 5 +349245.65 3570.0 – C57
2021-01-09 04:24:08 S 06 38 57.576 -59 54 58.61 – V C57
2021-01-09 04:24:08 s 1 -138619.95 9 +348938.27 7050.0 – C57
2021-01-09 04:34:08 S 06 38 56.827 -59 55 19.27 – V C57
2021-01-09 04:34:08 s 1 -138883.22 5 +348629.96 9960.0 – C57
2021-01-09 04:44:08 S 06 38 55.798 -59 55 39.11 – V C57
2021-01-09 04:44:08 s 1 -139146.11 3 +348320.72 2280.0 – C57
2021-01-09 04:54:08 S 06 38 54.828 -59 55 59.56 – V C57
2021-01-09 04:54:08 s 1 -139408.62 1 +348010.56 4010.0 – C57
2021-01-09 05:04:08 S 06 38 54.161 -59 56 19.61 – 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)