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
2021-01-06 17:24:08 s 1 -29164.385 0 +402488.42 9150.0 – C57
2021-01-06 17:34:08 S 06 43 52.790 -57 52 51.85 – V C57
2021-01-06 17:34:08 s 1 -29501.593 0 +402490.08 2910.0 – C57
2021-01-06 17:44:08 S 06 43 51.996 -57 53 14.03 – V C57
2021-01-06 17:44:08 s 1 -29838.731 0 +402490.88 6580.0 – C57
2021-01-06 17:54:08 S 06 43 51.170 -57 53 35.16 – V C57
2021-01-06 17:54:08 s 1 -30175.799 0 +402490.81 140.0 – C57
2021-01-06 18:04:08 S 06 43 50.544 -57 53 56.69 – V C57
2021-01-06 18:04:08 s 1 -30512.796 0 +402489.87 3590.0 – C57
2021-01-06 18:14:08 S 06 43 49.529 -57 54 19.04 – V C57
2021-01-06 18:14:08 s 1 -30849.720 0 +402488.06 6940.0 – C57
2021-01-06 18:24:08 S 06 43 48.835 -57 54 40.28 – V C57
2021-01-06 18:24:08 s 1 -31186.572 0 +402485.38 190.0 – C57
2021-01-06 18:34:08 S 06 43 48.034 -57 55 01.56 – V C57
2021-01-06 18:34:08 s 1 -31523.350 0 +402481.83 3320.0 – C57
2021-01-06 18:44:08 S 06 43 47.246 -57 55 22.26 – V C57
2021-01-06 18:44:08 s 1 -31860.054 0 +402477.42 6350.0 – C57
2021-01-06 18:54:08 S 06 43 46.428 -57 55 44.40 – V C57
2021-01-06 18:54:08 s 1 -32196.683 0 +402472.14 9260.0 – C57
2021-01-06 19:04:08 S 06 43 45.727 -57 56 05.96 – V C57
2021-01-06 19:04:08 s 1 -32533.236 0 +402465.99 2070.0 – C57
2021-01-06 19:14:08 S 06 43 44.890 -57 56 27.82 – V C57
2021-01-06 19:14:08 s 1 -32869.713 0 +402458.97 4760.0 – C57
2021-01-06 19:24:08 S 06 43 44.069 -57 56 49.31 – V C57
2021-01-06 19:24:08 s 1 -33206.113 0 +402451.09 7340.0 – C57
2021-01-06 19:34:08 S 06 43 43.416 -57 57 10.69 – V C57
2021-01-06 19:34:08 s 1 -33542.436 0 +402442.34 9810.0 – C57
2021-01-06 19:44:08 S 06 43 42.427 -57 57 32.90 – V C57
2021-01-06 19:44:08 s 1 -33878.679 0 +402432.72 2160.0 – C57
2021-01-06 19:54:08 S 06 43 41.645 -57 57 54.04 – V C57
2021-01-06 19:54:08 s 1 -34214.844 0 +402422.23 4390.0 – C57
2021-01-06 20:04:08 S 06 43 41.069 -57 58 14.95 – V C57
2021-01-06 20:04:08 s 1 -34550.928 0 +402410.88 6510.0 – C57
2021-01-06 20:14:08 S 06 43 40.073 -57 58 36.52 – V C57
2021-01-06 20:14:08 s 1 -34886.932 0 +402398.66 8510.0 – C57
2021-01-06 20:24:08 S 06 43 39.300 -57 58 58.12 – V C57
2021-01-06 20:24:08 s 1 -35222.855 0 +402385.58 390.0 – C57
2021-01-06 20:34:08 S 06 43 38.640 -57 59 19.54 – V C57
2021-01-06 20:34:08 s 1 -35558.695 0 +402371.63 2150.0 – C57
2021-01-06 20:44:08 S 06 43 37.714 -57 59 41.28 – V C57
2021-01-06 20:44:08 s 1 -35894.452 0 +402356.81 3790.0 – C57
2021-01-06 20:54:08 S 06 43 36.886 -58 00 02.23 – V C57
2021-01-06 20:54:08 s 1 -36230.126 0 +402341.13 5300.0 – C57
2021-01-06 21:04:08 S 06 43 36.240 -58 00 23.36 – V C57
2021-01-06 21:04:08 s 1 -36565.716 0 +402324.58 6700.0 – C57
2021-01-06 21:14:08 S 06 43 35.309 -58 00 45.47 – V C57
2021-01-06 21:14:08 s 1 -36901.220 0 +402307.17 7960.0 – C57
2021-01-06 21:24:08 S 06 43 34.510 -58 01 06.74 – V C57
2021-01-06 21:24:08 s 1 -37236.639 0 +402288.89 9110.0 – C57
2021-01-06 21:34:08 S 06 43 33.787 -58 01 28.06 – 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)