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
2021-01-14 18:14:08 s 1 +135786.49 3 +46784.117 6680.0 – C57
2021-01-14 18:24:08 S 06 29 29.119 -64 02 58.60 – V C57
2021-01-14 18:24:08 s 1 +136153.74 4 +47889.783 2100.0 – C57
2021-01-14 18:34:08 S 06 29 28.246 -64 03 19.62 – V C57
2021-01-14 18:34:08 s 1 +136514.73 9 +48993.242 6840.0 – C57
2021-01-14 18:44:08 S 06 29 27.905 -64 03 41.87 – V C57
2021-01-14 18:44:08 s 1 +136869.55 1 +50094.475 1020.0 – C57
2021-01-14 18:54:08 S 06 29 27.204 -64 04 03.14 – V C57
2021-01-14 18:54:08 s 1 +137218.25 3 +51193.467 4760.0 – C57
2021-01-14 19:14:08 S 06 29 25.879 -64 04 46.63 – V C57
2021-01-14 19:14:08 s 1 +137897.61 4 +53384.658 1430.0 – C57
2021-01-14 19:24:08 S 06 29 25.046 -64 05 08.34 – V C57
2021-01-14 19:24:08 s 1 +138228.41 3 +54476.828 4590.0 – C57
2021-01-14 19:34:08 S 06 29 24.178 -64 05 30.48 – V C57
2021-01-14 19:34:08 s 1 +138553.38 2 +55566.694 7800.0 – C57
2021-01-14 19:44:08 S 06 29 23.626 -64 05 52.55 – V C57
2021-01-14 19:44:08 s 1 +138872.59 0 +56654.244 1160.0 – C57
2021-01-14 19:54:08 S 06 29 23.009 -64 06 14.76 – V C57
2021-01-14 19:54:08 s 1 +139186.10 3 +57739.465 4800.0 – C57
2021-01-14 20:04:08 S 06 29 22.114 -64 06 36.04 – V C57
2021-01-14 20:04:08 s 1 +139493.98 5 +58822.345 8820.0 – C57
2021-01-14 20:24:08 S 06 29 20.854 -64 07 18.73 – V C57
2021-01-14 20:24:08 s 1 +140093.11 9 +60981.038 8450.0 – C57
2021-01-14 20:34:08 S 06 29 19.970 -64 07 41.38 – V C57
2021-01-14 20:34:08 s 1 +140384.49 6 +62056.830 4280.0 – C57
2021-01-14 20:44:08 S 06 29 19.490 -64 08 01.82 – V C57
2021-01-14 20:44:08 s 1 +140670.49 5 +63130.241 920.0 – C57
2021-01-14 20:54:08 S 06 29 18.629 -64 08 24.58 – V C57
2021-01-14 20:54:08 s 1 +140951.17 9 +64201.260 8480.0 – C57
2021-01-14 21:04:08 S 06 29 17.741 -64 08 45.85 – V C57
2021-01-14 21:04:08 s 1 +141226.60 6 +65269.880 7060.0 – C57
2021-01-14 21:14:08 S 06 29 17.222 -64 09 08.21 – V C57
2021-01-14 21:14:08 s 1 +141496.83 6 +66336.093 6760.0 – C57
2021-01-14 21:34:08 S 06 29 15.538 -64 09 51.59 – V C57
2021-01-14 21:34:08 s 1 +142021.93 5 +68461.271 9930.0 – C57
2021-01-14 21:44:08 S 06 29 14.868 -64 10 13.01 – V C57
2021-01-14 21:44:08 s 1 +142276.91 8 +69520.222 3590.0 – C57
2021-01-14 21:54:08 S 06 29 14.316 -64 10 35.62 – V C57
2021-01-14 21:54:08 s 1 +142526.93 2 +70576.740 8760.0 – C57
2021-01-14 22:04:08 S 06 29 13.351 -64 10 57.18 – V C57
2021-01-14 22:04:08 s 1 +142772.03 1 +71630.821 5540.0 – C57
2021-01-14 22:14:08 S 06 29 12.494 -64 11 18.38 – V C57
2021-01-14 22:14:08 s 1 +143012.26 9 +72682.458 4010.0 – C57
2021-01-14 22:24:08 S 06 29 11.974 -64 11 40.31 – V C57
2021-01-14 22:24:08 s 1 +143247.69 9 +73731.648 4260.0 – C57
2021-01-15 01:34:08 S 06 28 57.396 -64 18 25.13 – V C57
2021-01-15 01:34:08 s 1 +146872.98 0 +93197.841 530.0 – C57
2021-01-15 02:14:08 S 06 28 54.034 -64 19 58.58 – V C57
2021-01-15 02:14:08 s 1 +147447.50 8 +97182.319 4170.0 – C57
2021-01-15 02:34:08 S 06 28 52.457 -64 20 40.56 – 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)