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
2020-12-26 21:44:08 S 06 56 37.346 -47 57 16.27 – V C57
2020-12-26 21:44:08 s 1 -155427.81 0 +327502.60 8410.0 – C57
2020-12-26 21:54:08 S 06 56 36.814 -47 57 39.31 – V C57
2020-12-26 21:54:08 s 1 -155671.00 4 +327129.16 5830.0 – C57
2020-12-26 22:04:08 S 06 56 36.396 -47 58 03.04 – V C57
2020-12-26 22:04:08 s 1 -155913.72 5 +326754.74 2520.0 – C57
2020-12-26 22:14:08 S 06 56 35.786 -47 58 26.69 – V C57
2020-12-26 22:14:08 s 1 -156155.97 0 +326379.34 8500.0 – C57
2020-12-26 22:24:08 S 06 56 35.290 -47 58 50.74 – V C57
2020-12-26 22:24:08 s 1 -156397.73 9 +326002.96 3740.0 – C57
2020-12-26 22:34:08 S 06 56 34.922 -47 59 13.99 – V C57
2020-12-26 22:34:08 s 1 -156639.02 9 +325625.59 8260.0 – C57
2020-12-26 22:44:08 S 06 56 34.390 -47 59 37.72 – V C57
2020-12-26 22:44:08 s 1 -156879.83 9 +325247.24 2040.0 – C57
2020-12-26 22:54:08 S 06 56 33.811 -48 00 01.94 – V C57
2020-12-26 22:54:08 s 1 -157120.16 7 +324867.91 5090.0 – C57
2020-12-26 23:04:08 S 06 56 33.401 -48 00 25.67 – V C57
2020-12-26 23:04:08 s 1 -157360.01 1 +324487.60 7400.0 – C57
2020-12-26 23:14:08 S 06 56 33.029 -48 00 49.21 – V C57
2020-12-26 23:14:08 s 1 -157599.37 1 +324106.29 8970.0 – C57
2020-12-26 23:24:08 S 06 56 32.618 -48 01 12.68 – V C57
2020-12-26 23:24:08 s 1 -157838.24 3 +323724.01 9800.0 – C57
2020-12-26 23:34:08 S 06 56 31.956 -48 01 37.60 – V C57
2020-12-26 23:34:08 s 1 -158076.62 7 +323340.73 9890.0 – C57
2020-12-26 23:44:08 S 06 56 31.440 -48 02 01.03 – V C57
2020-12-26 23:44:08 s 1 -158314.52 0 +322956.47 9220.0 – C57
2020-12-26 23:54:08 S 06 56 30.950 -48 02 24.72 – V C57
2020-12-26 23:54:08 s 1 -158551.92 2 +322571.22 7810.0 – C57
2020-12-27 00:04:08 S 06 56 30.538 -48 02 47.90 – V C57
2020-12-27 00:04:08 s 1 -158788.82 9 +322184.98 5650.0 – C57
2020-12-27 00:14:08 S 06 56 29.959 -48 03 10.73 – V C57
2020-12-27 00:14:08 s 1 -159025.24 1 +321797.75 2730.0 – C57
2020-12-27 00:24:08 S 06 56 29.554 -48 03 35.71 – V C57
2020-12-27 00:24:08 s 1 -159261.15 6 +321409.52 9050.0 – C57
2020-12-27 00:34:08 S 06 56 29.033 -48 03 57.85 – V C57
2020-12-27 00:34:08 s 1 -159496.57 2 +321020.31 4620.0 – C57
2020-12-27 00:44:08 S 06 56 28.663 -48 04 24.92 – V C57
2020-12-27 00:44:08 s 1 -159731.48 7 +320630.11 9420.0 – C57
2020-12-27 00:54:08 S 06 56 28.301 -48 04 42.85 – V C57
2020-12-27 00:54:08 s 1 -159965.90 0 +320238.91 3460.0 – C57
2020-12-27 01:04:08 S 06 56 27.578 -48 05 09.06 – V C57
2020-12-27 01:04:08 s 1 -160199.80 8 +319846.71 6730.0 – C57
2020-12-27 01:14:08 S 06 56 26.990 -48 05 33.32 – V C57
2020-12-27 01:14:08 s 1 -160433.21 1 +319453.53 9230.0 – C57
2020-12-27 01:24:08 S 06 56 26.628 -48 05 56.65 – V C57
2020-12-27 01:24:08 s 1 -160666.10 5 +319059.34 960.0 – C57
2020-12-27 01:34:08 S 06 56 26.059 -48 06 20.74 – V C57
2020-12-27 01:34:08 s 1 -160898.49 1 +318664.16 1920.0 – C57
2020-12-27 01:41:25 C 06 56 49.88 -47 53 01.0 – q 834
2020-12-27 01:44:08 S 06 56 25.661 -48 06 44.60 – 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)