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 13:24:08 s 1 -152262.17 3 +330950.30 2830.0 – C57
2021-01-09 13:34:08 S 06 38 09.101 -60 13 07.43 – V C57
2021-01-09 13:34:08 s 1 -152503.09 0 +330591.14 960.0 – C57
2021-01-09 13:44:08 S 06 38 08.417 -60 13 27.62 – V C57
2021-01-09 13:44:08 s 1 -152743.55 4 +330231.01 8390.0 – C57
2021-01-09 13:54:08 S 06 38 07.325 -60 13 46.70 – V C57
2021-01-09 13:54:08 s 1 -152983.56 4 +329869.93 5100.0 – C57
2021-01-09 14:04:08 S 06 38 06.547 -60 14 06.36 – V C57
2021-01-09 14:04:08 s 1 -153223.11 8 +329507.89 1100.0 – C57
2021-01-09 14:14:08 S 06 38 05.722 -60 14 26.12 – V C57
2021-01-09 14:14:08 s 1 -153462.21 4 +329144.88 6380.0 – C57
2021-01-09 14:24:08 S 06 38 04.867 -60 14 46.21 – V C57
2021-01-09 14:24:08 s 1 -153700.85 1 +328780.92 940.0 – C57
2021-01-09 14:34:08 S 06 38 03.782 -60 15 05.98 – V C57
2021-01-09 14:34:08 s 1 -153939.02 7 +328415.98 4780.0 – C57
2021-01-09 14:44:08 S 06 38 03.058 -60 15 24.98 – V C57
2021-01-09 14:44:08 s 1 -154176.74 0 +328050.09 7890.0 – C57
2021-01-09 14:54:08 S 06 38 02.174 -60 15 44.50 – V C57
2021-01-09 14:54:08 s 1 -154413.99 0 +327683.23 280.0 – C57
2021-01-09 15:04:08 S 06 38 01.265 -60 16 03.65 – V C57
2021-01-09 15:04:08 s 1 -154650.77 5 +327315.40 1930.0 – C57
2021-01-09 15:14:08 S 06 38 00.326 -60 16 23.27 – V C57
2021-01-09 15:14:08 s 1 -154887.09 2 +326946.61 2860.0 – C57
2021-01-09 15:24:08 S 06 37 59.695 -60 16 41.81 – V C57
2021-01-09 15:24:08 s 1 -155122.94 1 +326576.85 3040.0 – C57
2021-01-09 15:34:08 S 06 37 58.382 -60 17 02.11 – V C57
2021-01-09 15:34:08 s 1 -155358.32 0 +326206.12 2490.0 – C57
2021-01-09 15:44:08 S 06 37 58.006 -60 17 21.34 – V C57
2021-01-09 15:44:08 s 1 -155593.22 7 +325834.42 1190.0 – C57
2021-01-09 15:54:08 S 06 37 56.878 -60 17 41.10 – V C57
2021-01-09 15:54:08 s 1 -155827.66 0 +325461.76 9150.0 – C57
2021-01-09 16:04:08 S 06 37 55.906 -60 18 01.37 – V C57
2021-01-09 16:04:08 s 1 -156061.61 9 +325088.12 6370.0 – C57
2021-01-09 16:14:08 S 06 37 55.085 -60 18 21.49 – V C57
2021-01-09 16:14:08 s 1 -156295.10 1 +324713.51 2830.0 – C57
2021-01-09 16:24:08 S 06 37 54.262 -60 18 40.36 – V C57
2021-01-09 16:24:08 s 1 -156528.10 5 +324337.93 8550.0 – C57
2021-01-09 16:34:08 S 06 37 53.347 -60 18 59.87 – V C57
2021-01-09 16:34:08 s 1 -156760.62 9 +323961.38 3500.0 – C57
2021-01-09 16:44:08 S 06 37 52.236 -60 19 21.07 – V C57
2021-01-09 16:44:08 s 1 -156992.67 2 +323583.86 7700.0 – C57
2021-01-09 16:54:08 S 06 37 51.511 -60 19 39.07 – V C57
2021-01-09 16:54:08 s 1 -157224.23 1 +323205.36 1140.0 – C57
2021-01-09 17:04:08 S 06 37 50.645 -60 19 58.40 – V C57
2021-01-09 17:04:08 s 1 -157455.30 6 +322825.88 3820.0 – C57
2021-01-09 17:14:08 S 06 37 49.709 -60 20 18.56 – V C57
2021-01-09 17:14:08 s 1 -157685.89 5 +322445.43 5730.0 – C57
2021-01-09 17:24:08 S 06 37 48.878 -60 20 37.86 – V C57
2021-01-09 17:24:08 s 1 -157915.99 6 +322064.01 6870.0 – C57
2021-01-09 17:34:08 S 06 37 48.017 -60 20 57.05 – 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)