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
2021-01-24 04:34:07 S 05 59 52.234 -70 58 19.49 – V C57
2021-01-24 04:34:07 s 1 -193702.95 8 +233687.57 3330.0 – C57
2021-01-24 04:44:07 S 05 59 50.618 -70 58 34.93 – V C57
2021-01-24 04:44:07 s 1 -193813.56 2 +233117.40 7940.0 – C57
2021-01-24 04:54:07 S 05 59 48.967 -70 58 49.84 – V C57
2021-01-24 04:54:07 s 1 -193923.18 4 +232546.06 840.0 – C57
2021-01-24 05:04:07 S 05 59 47.362 -70 59 04.38 – V C57
2021-01-24 05:04:07 s 1 -194031.81 8 +231973.54 2020.0 – C57
2021-01-24 05:14:07 S 05 59 45.667 -70 59 20.04 – V C57
2021-01-24 05:14:07 s 1 -194139.46 3 +231399.85 1470.0 – C57
2021-01-24 05:24:07 S 05 59 44.050 -70 59 34.76 – V C57
2021-01-24 05:24:07 s 1 -194246.11 2 +230824.97 9190.0 – C57
2021-01-24 05:34:07 S 05 59 42.427 -70 59 48.91 – V C57
2021-01-24 05:34:07 s 1 -194351.76 2 +230248.91 5170.0 – C57
2021-01-24 05:44:07 S 05 59 40.884 -71 00 05.76 – V C57
2021-01-24 05:44:07 s 1 -194456.41 0 +229671.67 9390.0 – C57
2021-01-24 05:54:07 S 05 59 39.480 -71 00 20.88 – V C57
2021-01-24 05:54:07 s 1 -194560.04 9 +229093.24 1860.0 – C57
2021-01-24 06:04:07 S 05 59 37.858 -71 00 34.81 – V C57
2021-01-24 06:04:07 s 1 -194662.67 7 +228513.63 2570.0 – C57
2021-01-24 06:14:07 S 05 59 36.024 -71 00 50.62 – V C57
2021-01-24 06:14:07 s 1 -194764.29 0 +227932.83 1500.0 – C57
2021-01-24 06:24:07 S 05 59 34.510 -71 01 05.52 – V C57
2021-01-24 06:24:07 s 1 -194864.88 2 +227350.85 8650.0 – C57
2021-01-24 06:34:07 S 05 59 32.798 -71 01 20.96 – V C57
2021-01-24 06:34:07 s 1 -194964.44 9 +226767.67 4020.0 – C57
2021-01-24 06:44:07 S 05 59 31.104 -71 01 35.98 – V C57
2021-01-24 06:44:07 s 1 -195062.98 8 +226183.30 7590.0 – C57
2021-01-24 06:54:07 S 05 59 29.652 -71 01 51.64 – V C57
2021-01-24 06:54:07 s 1 -195160.49 4 +225597.75 9350.0 – C57
2021-01-24 07:04:07 S 05 59 28.274 -71 02 05.96 – V C57
2021-01-24 07:04:07 s 1 -195256.96 1 +225010.99 9310.0 – C57
2021-01-24 07:14:07 S 05 59 26.578 -71 02 22.13 – V C57
2021-01-24 07:14:07 s 1 -195352.38 7 +224423.05 7440.0 – C57
2021-01-24 07:24:07 S 05 59 24.970 -71 02 37.54 – V C57
2021-01-24 07:24:07 s 1 -195446.76 7 +223833.90 3750.0 – C57
2021-01-24 07:34:07 S 05 59 23.210 -71 02 51.14 – V C57
2021-01-24 07:34:07 s 1 -195540.09 5 +223243.56 8220.0 – C57
2021-01-24 07:44:07 S 05 59 21.566 -71 03 06.52 – V C57
2021-01-24 07:44:07 s 1 -195632.36 8 +222652.02 850.0 – C57
2021-01-24 07:54:07 S 05 59 20.119 -71 03 22.46 – V C57
2021-01-24 07:54:07 s 1 -195723.58 1 +222059.28 1630.0 – C57
2021-01-24 08:04:07 S 05 59 18.631 -71 03 37.76 – V C57
2021-01-24 08:04:07 s 1 -195813.72 9 +221465.34 550.0 – C57
2021-01-24 08:14:07 S 05 59 17.105 -71 03 53.03 – V C57
2021-01-24 08:14:07 s 1 -195902.80 8 +220870.20 7600.0 – C57
2021-01-24 08:24:07 S 05 59 15.379 -71 04 08.11 – V C57
2021-01-24 08:24:07 s 1 -195990.81 4 +220273.85 2780.0 – C57
2021-01-24 08:34:07 S 05 59 13.903 -71 04 23.41 – V C57
2021-01-24 08:34:07 s 1 -196077.74 1 +219676.29 6070.0 – 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)