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
2020-12-24 23:24:08 S 06 58 46.430 -46 04 38.71 – V C57
2020-12-24 23:24:08 s 1 -74246.017 0 +395310.36 4060.0 – C57
2020-12-24 23:34:08 S 06 58 45.967 -46 05 04.34 – V C57
2020-12-24 23:34:08 s 1 -74572.526 0 +395190.04 2620.0 – C57
2020-12-24 23:44:08 S 06 58 45.602 -46 05 28.43 – V C57
2020-12-24 23:44:08 s 1 -74898.872 0 +395068.85 910.0 – C57
2020-12-24 23:54:08 S 06 58 45.209 -46 05 53.70 – V C57
2020-12-24 23:54:08 s 1 -75225.052 0 +394946.80 8910.0 – C57
2020-12-25 00:04:08 S 06 58 44.599 -46 06 17.78 – V C57
2020-12-25 00:04:08 s 1 -75551.067 0 +394823.87 6630.0 – C57
2020-12-25 00:14:08 S 06 58 44.174 -46 06 43.02 – V C57
2020-12-25 00:14:08 s 1 -75876.915 0 +394700.07 4080.0 – C57
2020-12-25 00:24:08 S 06 58 43.855 -46 07 07.18 – V C57
2020-12-25 00:24:08 s 1 -76202.596 0 +394575.40 1230.0 – C57
2020-12-25 00:34:08 S 06 58 43.421 -46 07 32.45 – V C57
2020-12-25 00:34:08 s 1 -76528.109 0 +394449.86 8110.0 – C57
2020-12-25 00:44:08 S 06 58 42.866 -46 07 57.40 – V C57
2020-12-25 00:44:08 s 1 -76853.453 0 +394323.45 4700.0 – C57
2020-12-25 00:54:08 S 06 58 42.422 -46 08 22.49 – V C57
2020-12-25 00:54:08 s 1 -77178.628 0 +394196.16 1000.0 – C57
2020-12-25 01:04:08 S 06 58 42.031 -46 08 46.72 – V C57
2020-12-25 01:04:08 s 1 -77503.632 0 +394068.01 7010.0 – C57
2020-12-25 01:14:08 S 06 58 41.674 -46 09 11.12 – V C57
2020-12-25 01:14:08 s 1 -77828.464 0 +393938.99 2740.0 – C57
2020-12-25 01:24:08 S 06 58 41.100 -46 09 36.11 – V C57
2020-12-25 01:24:08 s 1 -78153.125 0 +393809.09 8170.0 – C57
2020-12-25 01:34:08 S 06 58 40.673 -46 10 00.95 – V C57
2020-12-25 01:34:08 s 1 -78477.612 0 +393678.32 3320.0 – C57
2020-12-25 01:44:08 S 06 58 40.246 -46 10 25.79 – V C57
2020-12-25 01:44:08 s 1 -78801.926 0 +393546.69 8170.0 – C57
2020-12-25 01:54:08 S 06 58 39.821 -46 10 50.74 – V C57
2020-12-25 01:54:08 s 1 -79126.065 0 +393414.18 2730.0 – C57
2020-12-25 02:04:08 S 06 58 39.348 -46 11 15.61 – V C57
2020-12-25 02:04:08 s 1 -79450.028 0 +393280.79 6990.0 – C57
2020-12-25 02:14:08 S 06 58 38.818 -46 11 40.49 – V C57
2020-12-25 02:14:08 s 1 -79773.816 0 +393146.54 960.0 – C57
2020-12-25 02:24:08 S 06 58 38.534 -46 12 04.93 – V C57
2020-12-25 02:24:08 s 1 -80097.426 0 +393011.41 4630.0 – C57
2020-12-25 02:34:08 S 06 58 38.038 -46 12 29.95 – V C57
2020-12-25 02:34:08 s 1 -80420.858 0 +392875.42 8000.0 – C57
2020-12-25 02:44:08 S 06 58 37.620 -46 12 55.12 – V C57
2020-12-25 02:44:08 s 1 -80744.112 0 +392738.55 1080.0 – C57
2020-12-25 02:54:08 S 06 58 37.133 -46 13 18.52 – V C57
2020-12-25 02:54:08 s 1 -81067.186 0 +392600.80 3850.0 – C57
2020-12-25 03:04:08 S 06 58 36.718 -46 13 44.54 – V C57
2020-12-25 03:04:08 s 1 -81390.079 0 +392462.19 6320.0 – C57
2020-12-25 03:14:08 S 06 58 36.350 -46 14 08.88 – V C57
2020-12-25 03:14:08 s 1 -81712.791 0 +392322.70 8490.0 – C57
2020-12-25 03:24:08 S 06 58 35.782 -46 14 33.68 – V C57
2020-12-25 03:24:08 s 1 -82035.321 0 +392182.34 360.0 – 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)