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
2021-01-11 10:44:08 s 1 -194078.86 1 +194676.69 5260.0 – C57
2021-01-11 10:54:08 S 06 34 06.751 -61 38 48.26 – V C57
2021-01-11 10:54:08 s 1 -194107.45 0 +194017.29 7760.0 – C57
2021-01-11 11:04:08 S 06 34 05.827 -61 39 07.60 – V C57
2021-01-11 11:04:08 s 1 -194134.72 0 +193356.59 8060.0 – C57
2021-01-11 11:14:08 S 06 34 04.958 -61 39 24.77 – V C57
2021-01-11 11:14:08 s 1 -194160.66 5 +192694.58 6150.0 – C57
2021-01-11 11:24:08 S 06 34 04.061 -61 39 42.77 – V C57
2021-01-11 11:24:08 s 1 -194185.27 8 +192031.26 2020.0 – C57
2021-01-11 11:34:08 S 06 34 03.214 -61 40 01.70 – V C57
2021-01-11 11:34:08 s 1 -194208.55 2 +191366.64 5660.0 – C57
2021-01-11 11:44:08 S 06 34 02.294 -61 40 19.34 – V C57
2021-01-11 11:44:08 s 1 -194230.48 0 +190700.70 7050.0 – C57
2021-01-11 11:54:08 S 06 34 01.572 -61 40 37.02 – V C57
2021-01-11 11:54:08 s 1 -194251.05 7 +190033.45 6190.0 – C57
2021-01-11 12:04:08 S 06 34 00.694 -61 40 54.91 – V C57
2021-01-11 12:04:08 s 1 -194270.27 5 +189364.89 3070.0 – C57
2021-01-11 12:14:08 S 06 33 59.666 -61 41 13.52 – V C57
2021-01-11 12:14:08 s 1 -194288.12 7 +188695.01 7660.0 – C57
2021-01-11 12:24:08 S 06 33 58.970 -61 41 30.70 – V C57
2021-01-11 12:24:08 s 1 -194304.60 7 +188023.81 9970.0 – C57
2021-01-11 12:34:08 S 06 33 58.145 -61 41 50.14 – V C57
2021-01-11 12:34:08 s 1 -194319.70 7 +187351.30 9970.0 – C57
2021-01-11 12:44:08 S 06 33 57.026 -61 42 06.80 – V C57
2021-01-11 12:44:08 s 1 -194333.42 1 +186677.46 7660.0 – C57
2021-01-11 12:54:08 S 06 33 56.191 -61 42 25.24 – V C57
2021-01-11 12:54:08 s 1 -194345.76 7 +186002.39 3170.0 – C57
2021-01-11 13:04:08 S 06 33 55.387 -61 42 43.42 – V C57
2021-01-11 13:04:08 s 1 -194357.75 8 +185330.29 2360.0 – C57
2021-01-11 13:14:08 S 06 33 54.528 -61 43 01.02 – V C57
2021-01-11 13:14:08 s 1 -194367.22 5 +184652.26 2740.0 – C57
2021-01-11 13:24:08 S 06 33 53.467 -61 43 19.20 – V C57
2021-01-11 13:24:08 s 1 -194375.32 9 +183973.13 1060.0 – C57
2021-01-11 13:34:08 S 06 33 52.685 -61 43 36.66 – V C57
2021-01-11 13:34:08 s 1 -194382.01 2 +183292.66 7010.0 – C57
2021-01-11 13:44:08 S 06 33 51.914 -61 43 54.84 – V C57
2021-01-11 13:44:08 s 1 -194387.26 4 +182610.85 560.0 – C57
2021-01-11 13:54:08 S 06 33 51.043 -61 44 12.62 – V C57
2021-01-11 13:54:08 s 1 -194391.08 0 +181927.71 1720.0 – C57
2021-01-11 14:04:08 S 06 33 50.002 -61 44 31.49 – V C57
2021-01-11 14:04:08 s 1 -194393.45 1 +181243.24 460.0 – C57
2021-01-11 14:14:08 S 06 33 49.140 -61 44 49.02 – V C57
2021-01-11 14:14:08 s 1 -194394.37 1 +180557.42 6770.0 – C57
2021-01-11 14:24:08 S 06 33 48.444 -61 45 05.98 – V C57
2021-01-11 14:24:08 s 1 -194393.83 1 +179870.27 650.0 – C57
2021-01-11 14:34:08 S 06 33 47.424 -61 45 25.27 – V C57
2021-01-11 14:34:08 s 1 -194391.82 4 +179181.77 2070.0 – C57
2021-01-11 14:44:08 S 06 33 46.618 -61 45 42.26 – V C57
2021-01-11 14:44:08 s 1 -194388.34 2 +178491.92 1020.0 – C57
2021-01-11 14:54:08 S 06 33 45.694 -61 46 00.98 – 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)