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 19:04:08 s 1 -193753.55 0 +160077.56 2170.0 – C57
2021-01-11 19:14:08 S 06 33 23.114 -61 53 44.88 – V C57
2021-01-11 19:14:08 s 1 -193707.11 5 +159350.67 9130.0 – C57
2021-01-11 19:24:08 S 06 33 22.207 -61 54 02.99 – V C57
2021-01-11 19:24:08 s 1 -193658.96 4 +158622.39 3200.0 – C57
2021-01-11 19:34:08 S 06 33 21.130 -61 54 20.95 – V C57
2021-01-11 19:34:08 s 1 -193609.08 7 +157892.70 4380.0 – C57
2021-01-11 19:44:08 S 06 33 20.482 -61 54 36.94 – V C57
2021-01-11 19:44:08 s 1 -193557.47 4 +157161.62 2630.0 – C57
2021-01-11 19:54:08 S 06 33 19.651 -61 54 55.69 – V C57
2021-01-11 19:54:08 s 1 -193504.11 6 +156429.13 7960.0 – C57
2021-01-11 20:14:08 S 06 33 17.832 -61 55 31.04 – V C57
2021-01-11 20:14:08 s 1 -193392.12 1 +154959.93 9730.0 – C57
2021-01-11 20:24:08 S 06 33 16.949 -61 55 48.94 – V C57
2021-01-11 20:24:08 s 1 -193333.46 5 +154223.22 6150.0 – C57
2021-01-11 20:34:08 S 06 33 16.130 -61 56 06.72 – V C57
2021-01-11 20:34:08 s 1 -193273.02 3 +153485.09 9570.0 – C57
2021-01-11 20:44:08 S 06 33 15.336 -61 56 23.39 – V C57
2021-01-11 20:44:08 s 1 -193210.78 5 +152745.55 9960.0 – C57
2021-01-11 20:54:08 S 06 33 14.297 -61 56 41.71 – V C57
2021-01-11 20:54:08 s 1 -193146.73 9 +152004.60 7320.0 – C57
2021-01-11 21:04:08 S 06 33 13.466 -61 56 59.86 – V C57
2021-01-11 21:04:08 s 1 -193080.87 7 +151262.23 1620.0 – C57
2021-01-11 21:14:08 S 06 33 12.859 -61 57 18.04 – V C57
2021-01-11 21:14:08 s 1 -193013.18 7 +150518.44 2840.0 – C57
2021-01-11 21:24:08 S 06 33 11.959 -61 57 34.74 – V C57
2021-01-11 21:24:08 s 1 -192943.65 8 +149773.24 980.0 – C57
2021-01-11 21:34:08 S 06 33 10.834 -61 57 52.78 – V C57
2021-01-11 21:34:08 s 1 -192872.28 0 +149026.61 6000.0 – C57
2021-01-11 21:44:08 S 06 33 10.236 -61 58 10.31 – V C57
2021-01-11 21:44:08 s 1 -192799.04 2 +148278.55 7890.0 – C57
2021-01-11 21:54:08 S 06 33 09.379 -61 58 27.95 – V C57
2021-01-11 21:54:08 s 1 -192723.93 3 +147529.07 6630.0 – C57
2021-01-11 22:04:08 S 06 33 08.453 -61 58 45.41 – V C57
2021-01-11 22:04:08 s 1 -192646.94 2 +146778.16 2200.0 – C57
2021-01-11 22:14:08 S 06 33 07.303 -61 59 02.80 – V C57
2021-01-11 22:14:08 s 1 -192568.05 8 +146025.82 4590.0 – C57
2021-01-11 22:24:08 S 06 33 06.850 -61 59 19.79 – V C57
2021-01-11 22:24:08 s 1 -192487.26 9 +145272.06 3760.0 – C57
2021-01-11 22:34:08 S 06 33 05.990 -61 59 37.43 – V C57
2021-01-11 22:34:08 s 1 -192404.56 5 +144516.85 9720.0 – C57
2021-01-11 22:44:08 S 06 33 04.906 -61 59 55.90 – V C57
2021-01-11 22:44:08 s 1 -192319.93 3 +143760.22 2420.0 – C57
2021-01-11 23:04:08 S 06 33 03.206 -62 00 30.53 – V C57
2021-01-11 23:04:08 s 1 -192144.84 2 +142242.64 8020.0 – C57
2021-01-11 23:14:08 S 06 33 02.518 -62 00 48.60 – V C57
2021-01-11 23:14:08 s 1 -192054.35 9 +141481.69 860.0 – C57
2021-01-11 23:24:08 S 06 33 01.627 -62 01 05.95 – V C57
2021-01-11 23:24:08 s 1 -191961.90 2 +140719.30 390.0 – C57
2021-01-11 23:34:08 S 06 33 00.677 -62 01 23.95 – 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)