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 06:44:08 S 06 46 31.243 -56 36 09.97 – V C57
2021-01-05 06:44:08 s 1 +41346.925 0 +382786.88 9150.0 – C57
2021-01-05 06:54:08 S 06 46 30.502 -56 36 33.30 – V C57
2021-01-05 06:54:08 s 1 +41011.919 0 +382976.80 7220.0 – C57
2021-01-05 07:04:08 S 06 46 29.618 -56 36 55.55 – V C57
2021-01-05 07:04:08 s 1 +40676.814 0 +383165.75 5170.0 – C57
2021-01-05 07:14:08 S 06 46 29.083 -56 37 17.62 – V C57
2021-01-05 07:14:08 s 1 +40341.612 0 +383353.75 2990.0 – C57
2021-01-05 07:24:08 S 06 46 28.322 -56 37 39.54 – V C57
2021-01-05 07:24:08 s 1 +40006.313 0 +383540.79 680.0 – C57
2021-01-05 07:34:08 S 06 46 27.511 -56 38 02.62 – V C57
2021-01-05 07:34:08 s 1 +39670.918 0 +383726.88 8250.0 – C57
2021-01-05 07:44:08 S 06 46 26.842 -56 38 24.50 – V C57
2021-01-05 07:44:08 s 1 +39335.428 0 +383912.01 5690.0 – C57
2021-01-05 07:54:08 S 06 46 26.093 -56 38 47.40 – V C57
2021-01-05 07:54:08 s 1 +38999.845 0 +384096.19 3010.0 – C57
2021-01-05 08:04:08 S 06 46 25.214 -56 39 10.22 – V C57
2021-01-05 08:04:08 s 1 +38664.169 0 +384279.42 210.0 – C57
2021-01-05 08:14:08 S 06 46 24.665 -56 39 32.87 – V C57
2021-01-05 08:14:08 s 1 +38328.400 0 +384461.69 7290.0 – C57
2021-01-05 08:24:08 S 06 46 23.942 -56 39 53.78 – V C57
2021-01-05 08:24:08 s 1 +37992.541 0 +384643.01 4250.0 – C57
2021-01-05 08:34:08 S 06 46 23.198 -56 40 17.33 – V C57
2021-01-05 08:34:08 s 1 +37656.592 0 +384823.38 1100.0 – C57
2021-01-05 08:44:08 S 06 46 22.447 -56 40 39.58 – V C57
2021-01-05 08:44:08 s 1 +37320.554 0 +385002.80 7830.0 – C57
2021-01-05 08:54:08 S 06 46 21.797 -56 41 02.08 – V C57
2021-01-05 08:54:08 s 1 +36984.428 0 +385181.27 4440.0 – C57
2021-01-05 09:04:08 S 06 46 20.947 -56 41 23.35 – V C57
2021-01-05 09:04:08 s 1 +36648.215 0 +385358.79 940.0 – C57
2021-01-05 09:14:08 S 06 46 20.179 -56 41 47.76 – V C57
2021-01-05 09:14:08 s 1 +36311.915 0 +385535.36 7330.0 – C57
2021-01-05 09:24:08 S 06 46 19.666 -56 42 09.29 – V C57
2021-01-05 09:24:08 s 1 +35975.531 0 +385710.98 3610.0 – C57
2021-01-05 09:34:08 S 06 46 18.792 -56 42 31.43 – V C57
2021-01-05 09:34:08 s 1 +35639.062 0 +385885.65 9770.0 – C57
2021-01-05 09:44:08 S 06 46 18.041 -56 42 53.68 – V C57
2021-01-05 09:44:08 s 1 +35302.509 0 +386059.38 5830.0 – C57
2021-01-05 09:54:08 S 06 46 17.482 -56 43 15.74 – V C57
2021-01-05 09:54:08 s 1 +34965.874 0 +386232.16 1780.0 – C57
2021-01-05 10:04:08 S 06 46 16.649 -56 43 38.75 – V C57
2021-01-05 10:04:08 s 1 +34629.158 0 +386404.00 7630.0 – C57
2021-01-05 10:14:08 S 06 46 15.878 -56 44 00.67 – V C57
2021-01-05 10:14:08 s 1 +34292.361 0 +386574.89 3370.0 – C57
2021-01-05 10:24:08 S 06 46 15.247 -56 44 23.06 – V C57
2021-01-05 10:24:08 s 1 +33955.485 0 +386744.84 9010.0 – C57
2021-01-05 10:34:08 S 06 46 14.395 -56 44 45.78 – V C57
2021-01-05 10:34:08 s 1 +33618.529 0 +386913.84 4550.0 – C57
2021-01-05 10:44:08 S 06 46 13.771 -56 45 08.24 – V C57
2021-01-05 10:44:08 s 1 +33281.496 0 +387081.90 9980.0 – 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)