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
2021-01-20 14:54:08 S 06 13 02.890 -68 37 37.78 – V C57
2021-01-20 14:54:08 s 1 -61670.999 0 +390985.45 7380.0 – C57
2021-01-20 15:04:08 S 06 13 01.610 -68 37 57.25 – V C57
2021-01-20 15:04:08 s 1 -62007.395 0 +390920.31 7900.0 – C57
2021-01-20 15:14:08 S 06 13 00.034 -68 38 13.96 – V C57
2021-01-20 15:14:08 s 1 -62343.657 0 +390854.26 8210.0 – C57
2021-01-20 15:24:08 S 06 12 58.603 -68 38 31.74 – V C57
2021-01-20 15:24:08 s 1 -62679.785 0 +390787.30 8290.0 – C57
2021-01-20 15:34:08 S 06 12 56.978 -68 38 48.44 – V C57
2021-01-20 15:34:08 s 1 -63015.776 0 +390719.44 8160.0 – C57
2021-01-20 15:44:08 S 06 12 55.577 -68 39 05.58 – V C57
2021-01-20 15:44:08 s 1 -63351.631 0 +390650.67 7810.0 – C57
2021-01-20 15:54:08 S 06 12 54.086 -68 39 22.79 – V C57
2021-01-20 15:54:08 s 1 -63687.349 0 +390581.00 7240.0 – C57
2021-01-20 16:04:08 S 06 12 52.690 -68 39 41.22 – V C57
2021-01-20 16:04:08 s 1 -64022.929 0 +390510.42 6450.0 – C57
2021-01-20 16:14:08 S 06 12 51.358 -68 39 59.26 – V C57
2021-01-20 16:14:08 s 1 -64358.370 0 +390438.94 5430.0 – C57
2021-01-20 16:24:08 S 06 12 50.028 -68 40 16.39 – V C57
2021-01-20 16:24:08 s 1 -64693.671 0 +390366.55 4190.0 – C57
2021-01-20 16:34:08 S 06 12 48.406 -68 40 34.21 – V C57
2021-01-20 16:34:08 s 1 -65028.831 0 +390293.26 2720.0 – C57
2021-01-20 16:44:08 S 06 12 46.889 -68 40 50.95 – V C57
2021-01-20 16:44:08 s 1 -65363.851 0 +390219.06 1020.0 – C57
2021-01-20 16:54:08 S 06 12 45.322 -68 41 08.63 – V C57
2021-01-20 16:54:08 s 1 -65698.728 0 +390143.96 9090.0 – C57
2021-01-20 17:04:08 S 06 12 43.970 -68 41 26.23 – V C57
2021-01-20 17:04:08 s 1 -66033.462 0 +390067.95 6930.0 – C57
2021-01-20 17:14:08 S 06 12 42.773 -68 41 43.87 – V C57
2021-01-20 17:14:08 s 1 -66368.053 0 +389991.04 4540.0 – C57
2021-01-20 17:24:08 S 06 12 41.328 -68 42 01.48 – V C57
2021-01-20 17:24:08 s 1 -66702.499 0 +389913.22 1910.0 – C57
2021-01-20 17:34:08 S 06 12 39.806 -68 42 18.86 – V C57
2021-01-20 17:34:08 s 1 -67036.799 0 +389834.49 9050.0 – C57
2021-01-20 17:44:08 S 06 12 38.206 -68 42 36.04 – V C57
2021-01-20 17:44:08 s 1 -67370.954 0 +389754.87 5950.0 – C57
2021-01-20 17:54:08 S 06 12 36.888 -68 42 53.89 – V C57
2021-01-20 17:54:08 s 1 -67704.961 0 +389674.34 2620.0 – C57
2021-01-20 18:04:08 S 06 12 35.342 -68 43 10.81 – V C57
2021-01-20 18:04:08 s 1 -68038.821 0 +389592.90 9040.0 – C57
2021-01-20 18:14:08 S 06 12 33.931 -68 43 29.96 – V C57
2021-01-20 18:14:08 s 1 -68372.532 0 +389510.56 5230.0 – C57
2021-01-20 18:24:08 S 06 12 32.669 -68 43 46.45 – V C57
2021-01-20 18:24:08 s 1 -68706.093 0 +389427.31 1170.0 – C57
2021-01-20 18:34:08 S 06 12 31.034 -68 44 03.98 – V C57
2021-01-20 18:34:08 s 1 -69039.504 0 +389343.16 6860.0 – C57
2021-01-20 18:44:08 S 06 12 29.621 -68 44 21.91 – V C57
2021-01-20 18:44:08 s 1 -69372.765 0 +389258.11 2320.0 – C57
2021-01-20 18:54:08 S 06 12 28.082 -68 44 38.40 – V C57
2021-01-20 18:54:08 s 1 -69705.873 0 +389172.15 7520.0 – 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)