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
2020-12-20 12:34:08 s 1 +132292.70 9 +283585.21 6440.0 – C57
2020-12-20 12:44:08 S 07 02 37.212 -41 28 53.04 – V C57
2020-12-20 12:44:08 s 1 +132049.28 8 +284097.11 2550.0 – C57
2020-12-20 12:54:08 S 07 02 36.854 -41 29 20.76 – V C57
2020-12-20 12:54:08 s 1 +131805.24 5 +284607.70 7960.0 – C57
2020-12-20 13:04:08 S 07 02 36.706 -41 29 47.69 – V C57
2020-12-20 13:04:08 s 1 +131560.58 2 +285116.97 2670.0 – C57
2020-12-20 13:14:08 S 07 02 36.463 -41 30 13.90 – V C57
2020-12-20 13:14:08 s 1 +131315.30 4 +285624.93 6690.0 – C57
2020-12-20 13:24:08 S 07 02 36.110 -41 30 40.28 – V C57
2020-12-20 13:24:08 s 1 +131069.41 3 +286131.57 20.0 – C57
2020-12-20 13:34:08 S 07 02 35.878 -41 31 07.72 – V C57
2020-12-20 13:34:08 s 1 +130822.91 2 +286636.90 2670.0 – C57
2020-12-20 13:44:08 S 07 02 35.527 -41 31 34.54 – V C57
2020-12-20 13:44:08 s 1 +130575.80 5 +287140.92 4630.0 – C57
2020-12-20 13:54:08 S 07 02 35.328 -41 32 01.39 – V C57
2020-12-20 13:54:08 s 1 +130328.09 5 +287643.63 5920.0 – C57
2020-12-20 14:04:08 S 07 02 35.098 -41 32 26.52 – V C57
2020-12-20 14:04:08 s 1 +130079.78 4 +288145.04 6530.0 – C57
2020-12-20 14:14:08 S 07 02 34.877 -41 32 53.92 – V C57
2020-12-20 14:14:08 s 1 +129830.87 7 +288645.14 6480.0 – C57
2020-12-20 14:24:08 S 07 02 34.642 -41 33 21.35 – V C57
2020-12-20 14:24:08 s 1 +129581.37 5 +289143.95 5750.0 – C57
2020-12-20 14:34:08 S 07 02 34.193 -41 33 47.45 – V C57
2020-12-20 14:34:08 s 1 +129331.28 3 +289641.45 4370.0 – C57
2020-12-20 14:44:08 S 07 02 33.991 -41 34 14.63 – V C57
2020-12-20 14:44:08 s 1 +129080.60 2 +290137.66 2320.0 – C57
2020-12-20 14:54:08 S 07 02 33.710 -41 34 42.74 – V C57
2020-12-20 14:54:08 s 1 +128829.33 7 +290632.57 9630.0 – C57
2020-12-20 15:04:08 S 07 02 33.562 -41 35 08.30 – V C57
2020-12-20 15:04:08 s 1 +128577.49 1 +291126.20 6270.0 – C57
2020-12-20 15:14:08 S 07 02 33.305 -41 35 34.40 – V C57
2020-12-20 15:14:08 s 1 +128325.06 5 +291618.53 2270.0 – C57
2020-12-20 15:24:08 S 07 02 32.914 -41 36 00.43 – V C57
2020-12-20 15:24:08 s 1 +128072.06 3 +292109.57 7630.0 – C57
2020-12-20 15:34:08 S 07 02 32.585 -41 36 29.09 – V C57
2020-12-20 15:34:08 s 1 +127818.48 9 +292599.33 2350.0 – C57
2020-12-20 15:44:08 S 07 02 32.450 -41 36 53.68 – V C57
2020-12-20 15:44:08 s 1 +127564.34 5 +293087.80 6420.0 – C57
2020-12-20 15:54:08 S 07 02 32.083 -41 37 21.43 – V C57
2020-12-20 15:54:08 s 1 +127309.63 4 +293574.99 9870.0 – C57
2020-12-20 16:04:08 S 07 02 31.973 -41 37 47.24 – V C57
2020-12-20 16:04:08 s 1 +127054.35 8 +294060.90 2680.0 – C57
2020-12-20 16:14:08 S 07 02 31.598 -41 38 14.28 – V C57
2020-12-20 16:14:08 s 1 +126798.52 2 +294545.53 4870.0 – C57
2020-12-20 16:24:08 S 07 02 31.330 -41 38 42.14 – V C57
2020-12-20 16:24:08 s 1 +126542.12 7 +295028.88 6430.0 – C57
2020-12-20 16:34:08 S 07 02 30.960 -41 39 08.50 – V C57
2020-12-20 16:34:08 s 1 +126285.17 7 +295510.96 7370.0 – C57
2020-12-20 16:54:08 S 07 02 30.540 -41 40 01.27 – 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)