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
2021-01-12 12:54:08 s 1 -176570.65 5 +74074.390 8020.0 – C57
2021-01-12 13:04:08 S 06 31 54.007 -62 24 40.46 – V C57
2021-01-12 13:04:08 s 1 -176262.47 5 +73190.961 2160.0 – C57
2021-01-12 13:14:08 S 06 31 53.330 -62 24 58.14 – V C57
2021-01-12 13:14:08 s 1 -175950.78 8 +72306.086 340.0 – C57
2021-01-12 13:24:08 S 06 31 52.637 -62 25 14.45 – V C57
2021-01-12 13:24:08 s 1 -175635.56 7 +71419.770 2510.0 – C57
2021-01-12 13:34:08 S 06 31 51.806 -62 25 31.44 – V C57
2021-01-12 13:34:08 s 1 -175316.78 4 +70532.015 8620.0 – C57
2021-01-12 13:44:08 S 06 31 51.043 -62 25 48.76 – V C57
2021-01-12 13:44:08 s 1 -174994.40 8 +69642.826 8630.0 – C57
2021-01-12 13:54:08 S 06 31 49.987 -62 26 04.99 – V C57
2021-01-12 13:54:08 s 1 -174668.41 2 +68752.206 2480.0 – C57
2021-01-12 14:04:08 S 06 31 49.363 -62 26 23.21 – V C57
2021-01-12 14:04:08 s 1 -174338.76 6 +67860.160 120.0 – C57
2021-01-12 14:14:08 S 06 31 48.588 -62 26 40.60 – V C57
2021-01-12 14:14:08 s 1 -174005.44 0 +66966.691 1510.0 – C57
2021-01-12 14:34:08 S 06 31 47.203 -62 27 13.90 – V C57
2021-01-12 14:34:08 s 1 -173327.62 7 +65175.507 5300.0 – C57
2021-01-12 14:44:08 S 06 31 46.174 -62 27 32.51 – V C57
2021-01-12 14:44:08 s 1 -172983.07 9 +64277.801 7600.0 – C57
2021-01-12 14:54:08 S 06 31 45.590 -62 27 46.84 – V C57
2021-01-12 14:54:08 s 1 -172634.72 8 +63378.692 3430.0 – C57
2021-01-12 15:04:08 S 06 31 44.902 -62 28 03.47 – V C57
2021-01-12 15:04:08 s 1 -172282.54 4 +62478.185 2740.0 – C57
2021-01-12 15:14:08 S 06 31 44.090 -62 28 19.99 – V C57
2021-01-12 15:14:08 s 1 -171926.49 3 +61576.287 5470.0 – C57
2021-01-12 15:24:08 S 06 31 43.176 -62 28 36.98 – V C57
2021-01-12 15:24:08 s 1 -171566.54 4 +60673.002 1570.0 – C57
2021-01-12 15:34:08 S 06 31 42.538 -62 28 54.41 – V C57
2021-01-12 15:34:08 s 1 -171202.66 3 +59768.338 980.0 – C57
2021-01-12 15:44:08 S 06 31 41.914 -62 29 10.82 – V C57
2021-01-12 15:44:08 s 1 -170834.81 9 +58862.299 3640.0 – C57
2021-01-12 15:54:08 S 06 31 41.038 -62 29 27.49 – V C57
2021-01-12 15:54:08 s 1 -170462.97 6 +57954.893 9500.0 – C57
2021-01-12 16:04:08 S 06 31 40.058 -62 29 44.66 – V C57
2021-01-12 16:04:08 s 1 -170087.10 2 +57046.126 8500.0 – C57
2021-01-12 16:14:08 S 06 31 39.432 -62 30 00.47 – V C57
2021-01-12 16:14:08 s 1 -169707.16 1 +56136.005 580.0 – C57
2021-01-12 16:24:08 S 06 31 38.722 -62 30 17.42 – V C57
2021-01-12 16:24:08 s 1 -169323.12 0 +55224.538 5680.0 – C57
2021-01-12 16:34:08 S 06 31 37.944 -62 30 33.62 – V C57
2021-01-12 16:34:08 s 1 -168934.94 2 +54311.731 3740.0 – C57
2021-01-12 16:44:08 S 06 31 37.274 -62 30 52.16 – V C57
2021-01-12 16:44:08 s 1 -168542.59 3 +53397.593 4690.0 – C57
2021-01-12 16:54:08 S 06 31 36.343 -62 31 08.72 – V C57
2021-01-12 16:54:08 s 1 -168146.03 6 +52482.132 8490.0 – C57
2021-01-12 17:04:08 S 06 31 35.676 -62 31 24.85 – V C57
2021-01-12 17:04:08 s 1 -167745.23 5 +51565.356 5050.0 – C57
2021-01-12 17:14:08 S 06 31 35.230 -62 31 40.87 – 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)