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
2021-01-23 03:14:08 S 06 03 54.245 -70 18 50.87 – V C57
2021-01-23 03:14:08 s 1 -167465.64 6 +307372.84 5540.0 – C57
2021-01-23 03:24:07 S 06 03 52.646 -70 19 05.81 – V C57
2021-01-23 03:24:07 s 1 -167688.88 9 +306968.40 5060.0 – C57
2021-01-23 03:34:08 S 06 03 51.019 -70 19 20.32 – V C57
2021-01-23 03:34:08 s 1 -167911.57 6 +306562.95 3620.0 – C57
2021-01-23 03:44:07 S 06 03 49.351 -70 19 36.98 – V C57
2021-01-23 03:44:07 s 1 -168133.70 7 +306156.48 1240.0 – C57
2021-01-23 03:54:07 S 06 03 47.863 -70 19 53.83 – V C57
2021-01-23 03:54:07 s 1 -168355.27 7 +305748.99 7890.0 – C57
2021-01-23 04:04:07 S 06 03 46.219 -70 20 10.14 – V C57
2021-01-23 04:04:07 s 1 -168576.28 6 +305340.48 3570.0 – C57
2021-01-23 04:14:07 S 06 03 44.609 -70 20 25.91 – V C57
2021-01-23 04:14:07 s 1 -168796.73 2 +304930.95 8290.0 – C57
2021-01-23 04:24:08 S 06 03 43.102 -70 20 41.71 – V C57
2021-01-23 04:24:08 s 1 -169016.61 3 +304520.39 2040.0 – C57
2021-01-23 04:34:07 S 06 03 41.501 -70 20 56.94 – V C57
2021-01-23 04:34:07 s 1 -169235.92 6 +304108.80 4810.0 – C57
2021-01-23 04:44:08 S 06 03 39.785 -70 21 12.56 – V C57
2021-01-23 04:44:08 s 1 -169454.67 0 +303696.20 6610.0 – C57
2021-01-23 04:54:07 S 06 03 38.143 -70 21 27.61 – V C57
2021-01-23 04:54:07 s 1 -169672.84 3 +303282.56 7420.0 – C57
2021-01-23 05:04:08 S 06 03 36.605 -70 21 43.70 – V C57
2021-01-23 05:04:08 s 1 -169890.44 2 +302867.91 7250.0 – C57
2021-01-23 05:14:07 S 06 03 35.172 -70 22 00.62 – V C57
2021-01-23 05:14:07 s 1 -170107.46 7 +302452.22 6090.0 – C57
2021-01-23 05:24:07 S 06 03 33.571 -70 22 16.68 – V C57
2021-01-23 05:24:07 s 1 -170323.91 4 +302035.51 3940.0 – C57
2021-01-23 05:34:07 S 06 03 32.114 -70 22 32.27 – V C57
2021-01-23 05:34:07 s 1 -170539.78 1 +301617.76 790.0 – C57
2021-01-23 05:44:07 S 06 03 30.418 -70 22 49.08 – V C57
2021-01-23 05:44:07 s 1 -170755.06 8 +301198.99 6650.0 – C57
2021-01-23 05:54:08 S 06 03 28.687 -70 23 04.16 – V C57
2021-01-23 05:54:08 s 1 -170969.77 1 +300779.19 1500.0 – C57
2021-01-23 06:04:07 S 06 03 26.921 -70 23 20.08 – V C57
2021-01-23 06:04:07 s 1 -171183.88 8 +300358.35 5350.0 – C57
2021-01-23 06:14:08 S 06 03 25.558 -70 23 36.24 – V C57
2021-01-23 06:14:08 s 1 -171397.41 8 +299936.49 8180.0 – C57
2021-01-23 06:24:07 S 06 03 24.173 -70 23 52.04 – V C57
2021-01-23 06:24:07 s 1 -171610.35 9 +299513.59 0.0 – C57
2021-01-23 06:34:08 S 06 03 22.673 -70 24 08.06 – V C57
2021-01-23 06:34:08 s 1 -171822.70 8 +299089.66 810.0 – C57
2021-01-23 06:44:07 S 06 03 21.010 -70 24 22.93 – V C57
2021-01-23 06:44:07 s 1 -172034.46 3 +298664.69 590.0 – C57
2021-01-23 06:54:07 S 06 03 19.277 -70 24 39.42 – V C57
2021-01-23 06:54:07 s 1 -172245.62 3 +298238.69 9350.0 – C57
2021-01-23 07:04:07 S 06 03 17.606 -70 24 54.79 – V C57
2021-01-23 07:04:07 s 1 -172456.18 4 +297811.65 7080.0 – C57
2021-01-23 07:14:07 S 06 03 16.082 -70 25 10.63 – V C57
2021-01-23 07:14:07 s 1 -172666.14 6 +297383.57 3780.0 – 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)