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 01:44:08 s 1 +141363.72 9 +214516.11 3210.0 – C57
2021-01-16 01:54:08 S 06 26 42.386 -65 09 56.74 – V C57
2021-01-16 01:54:08 s 1 +141197.52 2 +215204.95 5840.0 – C57
2021-01-16 02:04:08 S 06 26 41.549 -65 10 18.44 – V C57
2021-01-16 02:04:08 s 1 +141030.13 3 +215891.99 6430.0 – C57
2021-01-16 02:14:08 S 06 26 40.610 -65 10 39.29 – V C57
2021-01-16 02:14:08 s 1 +140861.56 8 +216577.25 5000.0 – C57
2021-01-16 02:24:08 S 06 26 39.372 -65 10 59.66 – V C57
2021-01-16 02:24:08 s 1 +140691.83 7 +217260.73 1550.0 – C57
2021-01-16 02:34:08 S 06 26 38.323 -65 11 20.26 – V C57
2021-01-16 02:34:08 s 1 +140520.94 6 +217942.43 6110.0 – C57
2021-01-16 02:44:08 S 06 26 37.498 -65 11 41.53 – V C57
2021-01-16 02:44:08 s 1 +140348.90 3 +218622.35 8690.0 – C57
2021-01-16 02:54:08 S 06 26 36.588 -65 12 02.84 – V C57
2021-01-16 02:54:08 s 1 +140175.71 6 +219300.51 9290.0 – C57
2021-01-16 03:04:08 S 06 26 35.390 -65 12 22.86 – V C57
2021-01-16 03:04:08 s 1 +140001.39 2 +219976.90 7940.0 – C57
2021-01-16 03:14:08 S 06 26 34.234 -65 12 43.02 – V C57
2021-01-16 03:14:08 s 1 +139825.93 9 +220651.53 4640.0 – C57
2021-01-16 03:24:08 S 06 26 33.286 -65 13 04.40 – V C57
2021-01-16 03:24:08 s 1 +139649.36 4 +221324.41 9400.0 – C57
2021-01-16 03:34:08 S 06 26 32.249 -65 13 25.07 – V C57
2021-01-16 03:34:08 s 1 +139471.67 5 +221995.53 2250.0 – C57
2021-01-16 03:44:08 S 06 26 31.214 -65 13 45.59 – V C57
2021-01-16 03:44:08 s 1 +139292.87 8 +222664.90 3190.0 – C57
2021-01-16 03:54:08 S 06 26 30.113 -65 14 05.50 – V C57
2021-01-16 03:54:08 s 1 +139112.98 2 +223332.52 2230.0 – C57
2021-01-16 04:04:08 S 06 26 29.177 -65 14 26.81 – V C57
2021-01-16 04:04:08 s 1 +138931.99 2 +223998.41 9380.0 – C57
2021-01-16 04:14:08 S 06 26 28.262 -65 14 47.29 – V C57
2021-01-16 04:14:08 s 1 +138749.91 7 +224662.56 4670.0 – C57
2021-01-16 04:24:08 S 06 26 27.154 -65 15 08.46 – V C57
2021-01-16 04:24:08 s 1 +138566.76 3 +225324.98 8090.0 – C57
2021-01-16 04:34:08 S 06 26 25.882 -65 15 27.94 – V C57
2021-01-16 04:34:08 s 1 +138382.53 7 +225985.66 9670.0 – C57
2021-01-16 04:44:08 S 06 26 24.929 -65 15 49.14 – V C57
2021-01-16 04:44:08 s 1 +138197.24 6 +226644.63 9410.0 – C57
2021-01-16 04:54:08 S 06 26 24.002 -65 16 09.91 – V C57
2021-01-16 04:54:08 s 1 +138010.89 7 +227301.87 7330.0 – C57
2021-01-16 05:04:08 S 06 26 22.932 -65 16 31.08 – V C57
2021-01-16 05:04:08 s 1 +137823.49 7 +227957.39 3430.0 – C57
2021-01-16 05:14:08 S 06 26 21.533 -65 17 00.35 – V C57
2021-01-16 05:14:08 s 1 +137635.05 2 +228611.21 7730.0 – C57
2021-01-16 05:34:08 S 06 26 20.388 -65 17 26.52 – V C57
2021-01-16 05:34:08 s 1 +137255.05 6 +229913.70 970.0 – C57
2021-01-16 05:44:08 S 06 26 18.689 -65 17 52.51 – V C57
2021-01-16 05:44:08 s 1 +137063.51 7 +230562.40 9930.0 – C57
2021-01-16 05:54:08 S 06 26 17.582 -65 18 14.62 – V C57
2021-01-16 05:54:08 s 1 +136870.96 1 +231209.40 7140.0 – C57
2021-01-16 06:04:08 S 06 26 16.562 -65 18 32.72 – 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)