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
2021-01-05 10:54:08 S 06 46 13.090 -56 45 31.00 – V C57
2021-01-05 10:54:08 s 1 +32944.386 0 +387249.02 5320.0 – C57
2021-01-05 11:04:08 S 06 46 12.264 -56 45 52.92 – V C57
2021-01-05 11:04:08 s 1 +32607.200 0 +387415.19 550.0 – C57
2021-01-05 11:14:08 S 06 46 11.414 -56 46 15.82 – V C57
2021-01-05 11:14:08 s 1 +32269.939 0 +387580.43 5690.0 – C57
2021-01-05 11:24:08 S 06 46 10.829 -56 46 37.42 – V C57
2021-01-05 11:24:08 s 1 +31932.604 0 +387744.72 740.0 – C57
2021-01-05 11:34:08 S 06 46 09.991 -56 47 00.17 – V C57
2021-01-05 11:34:08 s 1 +31595.196 0 +387908.08 5690.0 – C57
2021-01-05 11:44:08 S 06 46 09.314 -56 47 22.78 – V C57
2021-01-05 11:44:08 s 1 +31257.715 0 +388070.49 550.0 – C57
2021-01-05 11:54:08 S 06 46 08.616 -56 47 45.28 – V C57
2021-01-05 11:54:08 s 1 +30920.163 0 +388231.97 5310.0 – C57
2021-01-05 12:04:08 S 06 46 07.817 -56 48 07.60 – V C57
2021-01-05 12:04:08 s 1 +30582.541 0 +388392.51 9980.0 – C57
2021-01-05 12:14:08 S 06 46 07.080 -56 48 29.48 – V C57
2021-01-05 12:14:08 s 1 +30244.849 0 +388552.11 4570.0 – C57
2021-01-05 12:24:08 S 06 46 06.401 -56 48 51.66 – V C57
2021-01-05 12:24:08 s 1 +29907.088 0 +388710.77 9060.0 – C57
2021-01-05 12:34:08 S 06 46 05.628 -56 49 13.76 – V C57
2021-01-05 12:34:08 s 1 +29569.259 0 +388868.50 3470.0 – C57
2021-01-05 12:44:08 S 06 46 04.891 -56 49 37.27 – V C57
2021-01-05 12:44:08 s 1 +29231.364 0 +389025.29 7800.0 – C57
2021-01-05 12:54:08 S 06 46 04.126 -56 49 58.01 – V C57
2021-01-05 12:54:08 s 1 +28893.403 0 +389181.15 2030.0 – C57
2021-01-05 13:04:08 S 06 46 03.499 -56 50 20.62 – V C57
2021-01-05 13:04:08 s 1 +28555.376 0 +389336.07 6190.0 – C57
2021-01-05 13:14:08 S 06 46 02.616 -56 50 43.30 – V C57
2021-01-05 13:14:08 s 1 +28217.285 0 +389490.06 260.0 – C57
2021-01-05 13:24:08 S 06 46 01.961 -56 51 05.94 – V C57
2021-01-05 13:24:08 s 1 +27879.131 0 +389643.11 4250.0 – C57
2021-01-05 13:34:08 S 06 46 01.330 -56 51 28.62 – V C57
2021-01-05 13:34:08 s 1 +27540.915 0 +389795.23 8160.0 – C57
2021-01-05 13:44:08 S 06 46 00.382 -56 51 50.65 – V C57
2021-01-05 13:44:08 s 1 +27202.637 0 +389946.42 1990.0 – C57
2021-01-05 13:54:08 S 06 45 59.599 -56 52 11.42 – V C57
2021-01-05 13:54:08 s 1 +26864.299 0 +390096.68 5750.0 – C57
2021-01-05 14:04:08 S 06 45 58.903 -56 52 32.59 – V C57
2021-01-05 14:04:08 s 1 +26525.900 0 +390246.01 9420.0 – C57
2021-01-05 14:14:08 S 06 45 58.291 -56 52 57.11 – V C57
2021-01-05 14:14:08 s 1 +26187.443 0 +390394.40 3030.0 – C57
2021-01-05 14:24:08 S 06 45 57.554 -56 53 20.47 – V C57
2021-01-05 14:24:08 s 1 +25848.928 0 +390541.87 6560.0 – C57
2021-01-05 14:34:08 S 06 45 56.806 -56 53 41.86 – V C57
2021-01-05 14:34:08 s 1 +25510.355 0 +390688.41 10.0 – C57
2021-01-05 14:44:08 S 06 45 55.999 -56 54 04.36 – V C57
2021-01-05 14:44:08 s 1 +25171.727 0 +390834.01 3400.0 – C57
2021-01-05 14:54:08 S 06 45 55.327 -56 54 26.21 – V C57
2021-01-05 14:54:08 s 1 +24833.043 0 +390978.69 6710.0 – 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)