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
2021-01-28 19:14:07 s 1 +153626.14 6 +144279.50 440.0 – C57
2021-01-28 19:34:07 S 05 44 41.683 -73 57 29.02 – V C57
2021-01-28 19:34:07 s 1 +153576.75 6 +146000.41 9940.0 – C57
2021-01-28 19:44:07 S 05 44 40.570 -73 57 42.23 – V C57
2021-01-28 19:44:07 s 1 +153548.66 4 +146857.63 3460.0 – C57
2021-01-28 20:34:07 S 05 44 29.227 -73 59 20.83 – V C57
2021-01-28 20:34:07 s 1 +153374.95 8 +151111.60 60.0 – C57
2021-01-28 20:44:07 S 05 44 27.060 -73 59 37.54 – V C57
2021-01-28 20:44:07 s 1 +153333.69 1 +151955.99 9410.0 – C57
2021-01-28 20:54:07 S 05 44 25.068 -73 59 56.00 – V C57
2021-01-28 20:54:07 s 1 +153290.28 9 +152798.27 4840.0 – C57
2021-01-28 21:04:07 S 05 44 23.105 -74 00 14.76 – V C57
2021-01-28 21:04:07 s 1 +153244.76 9 +153638.43 6380.0 – C57
2021-01-28 21:14:07 S 05 44 20.990 -74 00 35.17 – V C57
2021-01-28 21:14:07 s 1 +153197.14 8 +154476.48 4060.0 – C57
2021-01-28 21:24:07 S 05 44 18.842 -74 00 53.57 – V C57
2021-01-28 21:24:07 s 1 +153147.44 2 +155312.42 7910.0 – C57
2021-01-28 21:34:07 S 05 44 16.855 -74 01 12.25 – V C57
2021-01-28 21:34:07 s 1 +153095.66 8 +156146.26 7970.0 – C57
2021-01-28 21:44:07 S 05 44 14.909 -74 01 31.62 – V C57
2021-01-28 21:44:07 s 1 +153041.84 1 +156978.00 4260.0 – C57
2021-01-28 21:54:07 S 05 44 12.722 -74 01 49.37 – V C57
2021-01-28 21:54:07 s 1 +152985.97 8 +157807.64 6810.0 – C57
2021-01-28 22:04:07 S 05 44 10.440 -74 02 08.23 – V C57
2021-01-28 22:04:07 s 1 +152928.09 4 +158635.20 5650.0 – C57
2021-01-28 22:14:07 S 05 44 08.539 -74 02 28.21 – V C57
2021-01-28 22:14:07 s 1 +152868.20 6 +159460.67 810.0 – C57
2021-01-28 22:24:07 S 05 44 06.521 -74 02 47.11 – V C57
2021-01-28 22:24:07 s 1 +152806.32 9 +160284.06 2310.0 – C57
2021-01-28 22:34:07 S 05 44 04.294 -74 03 05.18 – V C57
2021-01-28 22:34:07 s 1 +152742.47 8 +161105.37 190.0 – C57
2021-01-28 22:44:07 S 05 44 02.153 -74 03 24.37 – V C57
2021-01-28 22:44:07 s 1 +152676.66 8 +161924.61 4470.0 – C57
2021-01-28 22:54:07 S 05 44 00.223 -74 03 42.62 – V C57
2021-01-28 22:54:07 s 1 +152608.91 4 +162741.79 5170.0 – C57
2021-01-28 23:04:07 S 05 43 57.703 -74 04 01.31 – V C57
2021-01-28 23:04:07 s 1 +152539.23 2 +163556.90 2340.0 – C57
2021-01-28 23:14:07 S 05 43 55.865 -74 04 20.39 – V C57
2021-01-28 23:14:07 s 1 +152467.63 5 +164369.96 5980.0 – C57
2021-01-28 23:24:07 S 05 43 53.662 -74 04 39.22 – V C57
2021-01-28 23:24:07 s 1 +152394.14 0 +165180.96 6140.0 – C57
2021-01-28 23:34:07 S 05 43 51.706 -74 04 57.50 – V C57
2021-01-28 23:34:07 s 1 +152318.75 9 +165989.92 2830.0 – C57
2021-01-28 23:44:07 S 05 43 49.231 -74 05 16.22 – V C57
2021-01-28 23:44:07 s 1 +152241.50 7 +166796.83 6080.0 – C57
2021-01-28 23:54:07 S 05 43 47.160 -74 05 35.16 – V C57
2021-01-28 23:54:07 s 1 +152162.39 9 +167601.70 5920.0 – C57
2021-01-29 00:04:07 S 05 43 45.386 -74 05 53.81 – V C57
2021-01-29 00:04:07 s 1 +152081.44 9 +168404.54 2380.0 – C57
2021-01-29 00:14:07 S 05 43 42.986 -74 06 13.03 – 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)