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
2021-01-05 02:14:08 S 06 46 50.520 -56 26 01.90 – V C57
2021-01-05 02:14:08 s 1 +50351.185 0 +377294.70 7460.0 – C57
2021-01-05 02:24:08 S 06 46 49.740 -56 26 23.82 – V C57
2021-01-05 02:24:08 s 1 +50019.219 0 +377510.74 9530.0 – C57
2021-01-05 02:34:08 S 06 46 49.241 -56 26 46.72 – V C57
2021-01-05 02:34:08 s 1 +49687.127 0 +377725.80 1430.0 – C57
2021-01-05 02:44:08 S 06 46 48.415 -56 27 08.78 – V C57
2021-01-05 02:44:08 s 1 +49354.910 0 +377939.88 3170.0 – C57
2021-01-05 02:54:08 S 06 46 47.573 -56 27 31.86 – V C57
2021-01-05 02:54:08 s 1 +49022.570 0 +378152.99 4740.0 – C57
2021-01-05 03:04:08 S 06 46 47.035 -56 27 54.32 – V C57
2021-01-05 03:04:08 s 1 +48690.106 0 +378365.12 6160.0 – C57
2021-01-05 03:14:08 S 06 46 46.284 -56 28 17.33 – V C57
2021-01-05 03:14:08 s 1 +48357.521 0 +378576.28 7410.0 – C57
2021-01-05 03:24:08 S 06 46 45.547 -56 28 40.55 – V C57
2021-01-05 03:24:08 s 1 +48024.816 0 +378786.46 8500.0 – C57
2021-01-05 03:34:08 S 06 46 44.798 -56 29 02.76 – V C57
2021-01-05 03:34:08 s 1 +47691.990 0 +378995.67 9440.0 – C57
2021-01-05 03:44:08 S 06 46 44.201 -56 29 24.79 – V C57
2021-01-05 03:44:08 s 1 +47359.046 0 +379203.91 220.0 – C57
2021-01-05 03:54:08 S 06 46 43.308 -56 29 47.40 – V C57
2021-01-05 03:54:08 s 1 +47025.985 0 +379411.18 850.0 – C57
2021-01-05 04:04:08 S 06 46 42.655 -56 30 09.58 – V C57
2021-01-05 04:04:08 s 1 +46692.806 0 +379617.48 1320.0 – C57
2021-01-05 04:14:08 S 06 46 42.067 -56 30 32.11 – V C57
2021-01-05 04:14:08 s 1 +46359.513 0 +379822.81 1640.0 – C57
2021-01-05 04:24:08 S 06 46 41.129 -56 30 55.51 – V C57
2021-01-05 04:24:08 s 1 +46026.104 0 +380027.17 1810.0 – C57
2021-01-05 04:34:08 S 06 46 40.481 -56 31 18.01 – V C57
2021-01-05 04:34:08 s 1 +45692.583 0 +380230.56 1830.0 – C57
2021-01-05 04:44:08 S 06 46 39.994 -56 31 40.01 – V C57
2021-01-05 04:44:08 s 1 +45358.948 0 +380432.98 1700.0 – C57
2021-01-05 04:54:08 S 06 46 39.062 -56 32 02.33 – V C57
2021-01-05 04:54:08 s 1 +45025.203 0 +380634.44 1430.0 – C57
2021-01-05 05:04:08 S 06 46 38.309 -56 32 25.08 – V C57
2021-01-05 05:04:08 s 1 +44691.346 0 +380834.93 1010.0 – C57
2021-01-05 05:34:08 S 06 46 36.158 -56 33 33.26 – V C57
2021-01-05 05:34:08 s 1 +43689.124 0 +381430.62 8900.0 – C57
2021-01-05 05:44:08 S 06 46 35.551 -56 33 55.69 – V C57
2021-01-05 05:44:08 s 1 +43354.836 0 +381627.26 7920.0 – C57
2021-01-05 05:54:08 S 06 46 34.694 -56 34 17.83 – V C57
2021-01-05 05:54:08 s 1 +43020.442 0 +381822.93 6790.0 – C57
2021-01-05 06:04:08 S 06 46 34.025 -56 34 40.04 – V C57
2021-01-05 06:04:08 s 1 +42685.944 0 +382017.64 5530.0 – C57
2021-01-05 06:14:08 S 06 46 33.413 -56 35 02.40 – V C57
2021-01-05 06:14:08 s 1 +42351.342 0 +382211.39 4140.0 – C57
2021-01-05 06:24:08 S 06 46 32.678 -56 35 25.15 – V C57
2021-01-05 06:24:08 s 1 +42016.638 0 +382404.18 2610.0 – C57
2021-01-05 06:34:08 S 06 46 31.790 -56 35 48.37 – V C57
2021-01-05 06:34:08 s 1 +41681.832 0 +382596.01 940.0 – 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)