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
2021-01-31 11:04:07 s 1 +63197.518 0 +351076.08 3380.0 – C57
2021-01-31 11:14:07 S 05 28 53.645 -75 49 55.74 – V C57
2021-01-31 11:14:07 s 1 +62862.184 0 +351358.41 3040.0 – C57
2021-01-31 11:24:07 S 05 28 50.834 -75 50 13.85 – V C57
2021-01-31 11:24:07 s 1 +62526.651 0 +351639.62 2300.0 – C57
2021-01-31 11:34:07 S 05 28 48.058 -75 50 29.47 – V C57
2021-01-31 11:34:07 s 1 +62190.922 0 +351919.72 1150.0 – C57
2021-01-31 11:44:07 S 05 28 45.324 -75 50 45.42 – V C57
2021-01-31 11:44:07 s 1 +61854.997 0 +352198.71 9610.0 – C57
2021-01-31 11:54:07 S 05 28 42.132 -75 51 02.23 – V C57
2021-01-31 11:54:07 s 1 +61518.878 0 +352476.59 7660.0 – C57
2021-01-31 12:04:07 S 05 28 39.682 -75 51 19.84 – V C57
2021-01-31 12:04:07 s 1 +61182.568 0 +352753.37 5320.0 – C57
2021-01-31 12:14:07 S 05 28 36.756 -75 51 36.32 – V C57
2021-01-31 12:14:07 s 1 +60846.066 0 +353029.04 2580.0 – C57
2021-01-31 12:24:07 S 05 28 33.454 -75 51 52.20 – V C57
2021-01-31 12:24:07 s 1 +60509.374 0 +353303.60 9450.0 – C57
2021-01-31 12:34:07 S 05 28 30.922 -75 52 09.16 – V C57
2021-01-31 12:34:07 s 1 +60172.494 0 +353577.06 5930.0 – C57
2021-01-31 12:44:07 S 05 28 27.960 -75 52 25.25 – V C57
2021-01-31 12:44:07 s 1 +59835.428 0 +353849.42 2030.0 – C57
2021-01-31 12:54:07 S 05 28 25.392 -75 52 41.63 – V C57
2021-01-31 12:54:07 s 1 +59498.176 0 +354120.67 7740.0 – C57
2021-01-31 13:04:07 S 05 28 22.255 -75 52 58.69 – V C57
2021-01-31 13:04:07 s 1 +59160.739 0 +354390.83 3070.0 – C57
2021-01-31 13:14:07 S 05 28 19.351 -75 53 15.68 – V C57
2021-01-31 13:14:07 s 1 +58823.121 0 +354659.88 8020.0 – C57
2021-01-31 13:24:07 S 05 28 16.656 -75 53 31.96 – V C57
2021-01-31 13:24:07 s 1 +58485.320 0 +354927.84 2590.0 – C57
2021-01-31 13:34:07 S 05 28 13.642 -75 53 47.04 – V C57
2021-01-31 13:34:07 s 1 +58147.340 0 +355194.70 6790.0 – C57
2021-01-31 13:44:07 S 05 28 10.831 -75 54 04.72 – V C57
2021-01-31 13:44:07 s 1 +57809.181 0 +355460.46 620.0 – C57
2021-01-31 13:54:07 S 05 28 08.074 -75 54 21.38 – V C57
2021-01-31 13:54:07 s 1 +57470.845 0 +355725.12 4080.0 – C57
2021-01-31 14:04:07 S 05 28 04.906 -75 54 37.12 – V C57
2021-01-31 14:04:07 s 1 +57132.333 0 +355988.70 7170.0 – C57
2021-01-31 14:14:07 S 05 28 02.028 -75 54 54.00 – V C57
2021-01-31 14:14:07 s 1 +56793.646 0 +356251.18 9890.0 – C57
2021-01-31 14:24:07 S 05 27 59.141 -75 55 09.98 – V C57
2021-01-31 14:24:07 s 1 +56454.786 0 +356512.56 2250.0 – C57
2021-01-31 14:34:07 S 05 27 56.470 -75 55 27.44 – V C57
2021-01-31 14:34:07 s 1 +56115.755 0 +356772.86 4260.0 – C57
2021-01-31 14:44:07 S 05 27 53.390 -75 55 44.08 – V C57
2021-01-31 14:44:07 s 1 +55776.552 0 +357032.06 5900.0 – C57
2021-01-31 14:54:07 S 05 27 50.640 -75 56 00.02 – V C57
2021-01-31 14:54:07 s 1 +55437.181 0 +357290.18 7190.0 – C57
2021-01-31 15:04:07 S 05 27 47.441 -75 56 15.86 – V C57
2021-01-31 15:04:07 s 1 +55097.641 0 +357547.21 8130.0 – C57
2021-01-31 15:14:07 S 05 27 44.688 -75 56 32.46 – 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)