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
2021-01-16 10:14:08 s 1 +131527.30 4 +247447.63 2180.0 – C57
2021-01-16 10:24:08 S 06 25 49.226 -65 27 25.70 – V C57
2021-01-16 10:24:08 s 1 +131309.54 3 +248050.18 5830.0 – C57
2021-01-16 10:34:08 S 06 25 48.374 -65 27 46.91 – V C57
2021-01-16 10:34:08 s 1 +131090.92 7 +248651.14 8010.0 – C57
2021-01-16 10:44:08 S 06 25 47.069 -65 28 07.79 – V C57
2021-01-16 10:44:08 s 1 +130871.46 1 +249250.49 8720.0 – C57
2021-01-16 10:54:08 S 06 25 45.994 -65 28 27.34 – V C57
2021-01-16 10:54:08 s 1 +130651.15 0 +249848.26 7970.0 – C57
2021-01-16 11:04:08 S 06 25 44.717 -65 28 47.35 – V C57
2021-01-16 11:04:08 s 1 +130430.00 0 +250444.44 5760.0 – C57
2021-01-16 11:14:08 S 06 25 43.994 -65 29 09.74 – V C57
2021-01-16 11:14:08 s 1 +130208.01 5 +251039.04 2110.0 – C57
2021-01-16 11:24:08 S 06 25 42.830 -65 29 29.69 – V C57
2021-01-16 11:24:08 s 1 +129985.20 1 +251632.06 7020.0 – C57
2021-01-16 11:34:08 S 06 25 41.743 -65 29 49.42 – V C57
2021-01-16 11:34:08 s 1 +129761.56 2 +252223.50 510.0 – C57
2021-01-16 11:44:08 S 06 25 40.481 -65 30 07.96 – V C57
2021-01-16 11:44:08 s 1 +129537.10 4 +252813.37 2570.0 – C57
2021-01-16 11:54:08 S 06 25 39.672 -65 30 30.24 – V C57
2021-01-16 11:54:08 s 1 +129311.83 1 +253401.66 3230.0 – C57
2021-01-16 12:04:08 S 06 25 38.664 -65 30 50.04 – V C57
2021-01-16 12:04:08 s 1 +129085.74 8 +253988.39 2480.0 – C57
2021-01-16 12:14:08 S 06 25 37.464 -65 31 09.73 – V C57
2021-01-16 12:14:08 s 1 +128858.86 1 +254573.56 340.0 – C57
2021-01-16 12:24:08 S 06 25 36.245 -65 31 29.89 – V C57
2021-01-16 12:24:08 s 1 +128631.17 4 +255157.16 6810.0 – C57
2021-01-16 12:34:08 S 06 25 35.242 -65 31 49.98 – V C57
2021-01-16 12:34:08 s 1 +128402.69 1 +255739.21 1910.0 – C57
2021-01-16 12:44:08 S 06 25 34.368 -65 32 11.62 – V C57
2021-01-16 12:44:08 s 1 +128173.41 8 +256319.70 5640.0 – C57
2021-01-16 12:54:08 S 06 25 33.149 -65 32 31.31 – V C57
2021-01-16 12:54:08 s 1 +127943.36 0 +256898.64 8000.0 – C57
2021-01-16 13:04:08 S 06 25 32.028 -65 32 51.29 – V C57
2021-01-16 13:04:08 s 1 +127712.52 0 +257476.03 9010.0 – C57
2021-01-16 13:14:08 S 06 25 30.809 -65 33 10.69 – V C57
2021-01-16 13:14:08 s 1 +127480.90 4 +258051.88 8680.0 – C57
2021-01-16 13:24:08 S 06 25 29.962 -65 33 32.04 – V C57
2021-01-16 13:24:08 s 1 +127248.51 6 +258626.18 7010.0 – C57
2021-01-16 13:34:08 S 06 25 28.966 -65 33 53.64 – V C57
2021-01-16 13:34:08 s 1 +127015.36 1 +259198.95 4000.0 – C57
2021-01-16 13:44:08 S 06 25 27.722 -65 34 12.65 – V C57
2021-01-16 13:44:08 s 1 +126781.44 4 +259770.18 9680.0 – C57
2021-01-16 13:54:08 S 06 25 26.479 -65 34 31.91 – V C57
2021-01-16 13:54:08 s 1 +126546.76 8 +260339.88 4040.0 – C57
2021-01-16 14:04:08 S 06 25 25.438 -65 34 52.72 – V C57
2021-01-16 14:04:08 s 1 +126311.33 9 +260908.04 7100.0 – C57
2021-01-16 14:14:08 S 06 25 24.607 -65 35 14.39 – V C57
2021-01-16 14:14:08 s 1 +126075.16 0 +261474.69 8850.0 – C57
2021-01-16 14:24:08 S 06 25 23.386 -65 35 34.44 – 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)