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
2020-12-28 15:44:08 S 06 54 32.729 -49 34 24.31 – V C57
2020-12-28 15:44:08 s 1 -195896.63 7 +199880.18 7050.0 – C57
2020-12-28 15:54:08 S 06 54 32.266 -49 34 46.45 – V C57
2020-12-28 15:54:08 s 1 -195941.51 8 +199226.93 5810.0 – C57
2020-12-28 16:04:08 S 06 54 31.819 -49 35 09.20 – V C57
2020-12-28 16:04:08 s 1 -195985.12 1 +198572.39 2640.0 – C57
2020-12-28 16:14:08 S 06 54 31.176 -49 35 31.38 – V C57
2020-12-28 16:14:08 s 1 -196027.43 9 +197916.57 7550.0 – C57
2020-12-28 16:24:08 S 06 54 30.840 -49 35 54.42 – V C57
2020-12-28 16:24:08 s 1 -196068.46 6 +197259.47 520.0 – C57
2020-12-28 16:34:08 S 06 54 30.394 -49 36 16.49 – V C57
2020-12-28 16:34:08 s 1 -196108.19 7 +196601.07 1550.0 – C57
2020-12-28 16:44:08 S 06 54 29.846 -49 36 37.58 – V C57
2020-12-28 16:44:08 s 1 -196146.62 4 +195941.38 630.0 – C57
2020-12-28 16:54:08 S 06 54 29.354 -49 37 01.13 – V C57
2020-12-28 16:54:08 s 1 -196183.74 1 +195280.41 7730.0 – C57
2020-12-28 17:04:08 S 06 54 28.800 -49 37 23.23 – V C57
2020-12-28 17:04:08 s 1 -196219.54 3 +194618.13 2870.0 – C57
2020-12-28 17:14:08 S 06 54 28.356 -49 37 45.30 – V C57
2020-12-28 17:14:08 s 1 -196254.02 2 +193954.57 6020.0 – C57
2020-12-28 17:24:08 S 06 54 27.890 -49 38 08.23 – V C57
2020-12-28 17:24:08 s 1 -196287.17 3 +193289.70 7180.0 – C57
2020-12-28 17:34:08 S 06 54 27.358 -49 38 30.98 – V C57
2020-12-28 17:34:08 s 1 -196318.98 8 +192623.54 6340.0 – C57
2020-12-28 17:44:08 S 06 54 26.856 -49 38 52.98 – V C57
2020-12-28 17:44:08 s 1 -196349.46 1 +191956.07 3480.0 – C57
2020-12-28 17:54:08 S 06 54 26.362 -49 39 14.87 – V C57
2020-12-28 17:54:08 s 1 -196378.58 6 +191287.30 8600.0 – C57
2020-12-28 18:04:08 S 06 54 25.913 -49 39 38.27 – V C57
2020-12-28 18:04:08 s 1 -196406.35 6 +190617.23 1690.0 – C57
2020-12-28 18:14:08 S 06 54 25.426 -49 39 59.76 – V C57
2020-12-28 18:14:08 s 1 -196432.76 4 +189945.85 2730.0 – C57
2020-12-28 18:24:08 S 06 54 24.768 -49 40 23.05 – V C57
2020-12-28 18:24:08 s 1 -196457.80 3 +189273.17 1720.0 – C57
2020-12-28 18:34:08 S 06 54 24.350 -49 40 44.83 – V C57
2020-12-28 18:34:08 s 1 -196481.46 6 +188599.17 8650.0 – C57
2020-12-28 18:44:08 S 06 54 24.041 -49 41 06.79 – V C57
2020-12-28 18:44:08 s 1 -196503.74 8 +187923.87 3510.0 – C57
2020-12-28 18:54:08 S 06 54 23.482 -49 41 28.86 – V C57
2020-12-28 18:54:08 s 1 -196524.64 0 +187247.25 6280.0 – C57
2020-12-28 19:04:08 S 06 54 22.882 -49 41 51.47 – V C57
2020-12-28 19:04:08 s 1 -196544.13 7 +186569.31 6960.0 – C57
2020-12-28 19:14:08 S 06 54 22.522 -49 42 13.32 – V C57
2020-12-28 19:14:08 s 1 -196562.23 0 +185890.06 5530.0 – C57
2020-12-28 19:24:08 S 06 54 22.027 -49 42 36.11 – V C57
2020-12-28 19:24:08 s 1 -196578.91 3 +185209.50 1990.0 – C57
2020-12-28 19:34:08 S 06 54 21.586 -49 42 57.92 – V C57
2020-12-28 19:34:08 s 1 -196594.17 8 +184527.61 6320.0 – C57
2020-12-28 19:44:08 S 06 54 20.851 -49 43 20.06 – V C57
2020-12-28 19:44:08 s 1 -196608.02 0 +183844.40 8510.0 – 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)