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
2020-12-26 04:44:08 S 06 57 26.268 -47 16 33.17 – V C57
2020-12-26 04:44:08 s 1 -128407.90 8 +360565.37 3370.0 – C57
2020-12-26 04:54:08 S 06 57 25.608 -47 16 55.60 – V C57
2020-12-26 04:54:08 s 1 -128691.73 1 +360288.54 3350.0 – C57
2020-12-26 05:04:08 S 06 57 25.248 -47 17 20.69 – V C57
2020-12-26 05:04:08 s 1 -128975.22 1 +360010.79 2810.0 – C57
2020-12-26 05:14:08 S 06 57 24.720 -47 17 45.02 – V C57
2020-12-26 05:14:08 s 1 -129258.37 8 +359732.12 1750.0 – C57
2020-12-26 05:24:08 S 06 57 24.396 -47 18 09.94 – V C57
2020-12-26 05:24:08 s 1 -129541.20 0 +359452.53 170.0 – C57
2020-12-26 05:34:08 S 06 57 23.760 -47 18 32.22 – V C57
2020-12-26 05:34:08 s 1 -129823.68 6 +359172.02 8070.0 – C57
2020-12-26 05:44:08 S 06 57 23.314 -47 18 56.52 – V C57
2020-12-26 05:44:08 s 1 -130105.83 5 +358890.59 5450.0 – C57
2020-12-26 05:54:08 S 06 57 22.834 -47 19 21.43 – V C57
2020-12-26 05:54:08 s 1 -130387.64 5 +358608.24 2290.0 – C57
2020-12-26 06:04:08 S 06 57 22.457 -47 19 45.08 – V C57
2020-12-26 06:04:08 s 1 -130669.11 6 +358324.96 8610.0 – C57
2020-12-26 06:14:08 S 06 57 21.874 -47 20 09.28 – V C57
2020-12-26 06:14:08 s 1 -130950.24 7 +358040.77 4400.0 – C57
2020-12-26 06:34:08 S 06 57 20.942 -47 20 56.76 – V C57
2020-12-26 06:34:08 s 1 -131511.48 0 +357469.60 4380.0 – C57
2020-12-26 06:44:08 S 06 57 20.489 -47 21 21.64 – V C57
2020-12-26 06:44:08 s 1 -131791.58 1 +357182.64 8570.0 – C57
2020-12-26 06:54:08 S 06 57 20.026 -47 21 46.12 – V C57
2020-12-26 06:54:08 s 1 -132071.33 6 +356894.74 2220.0 – C57
2020-12-26 07:04:08 S 06 57 19.507 -47 22 09.80 – V C57
2020-12-26 07:04:08 s 1 -132350.74 5 +356605.92 5330.0 – C57
2020-12-26 07:14:08 S 06 57 19.058 -47 22 33.96 – V C57
2020-12-26 07:14:08 s 1 -132629.80 5 +356316.18 7900.0 – C57
2020-12-26 07:24:08 S 06 57 18.713 -47 22 58.33 – V C57
2020-12-26 07:24:08 s 1 -132908.51 7 +356025.51 9930.0 – C57
2020-12-26 07:34:08 S 06 57 18.072 -47 23 22.74 – V C57
2020-12-26 07:34:08 s 1 -133186.87 8 +355733.92 1420.0 – C57
2020-12-26 07:44:08 S 06 57 17.626 -47 23 46.75 – V C57
2020-12-26 07:44:08 s 1 -133464.88 7 +355441.39 2360.0 – C57
2020-12-26 07:54:08 S 06 57 17.191 -47 24 11.59 – V C57
2020-12-26 07:54:08 s 1 -133742.54 4 +355147.94 2750.0 – C57
2020-12-26 08:04:08 S 06 57 16.666 -47 24 36.32 – V C57
2020-12-26 08:04:08 s 1 -134019.84 6 +354853.56 2590.0 – C57
2020-12-26 08:14:08 S 06 57 16.334 -47 24 56.05 – V C57
2020-12-26 08:14:08 s 1 -134296.79 3 +354558.26 1890.0 – C57
2020-12-26 08:24:08 S 06 57 15.742 -47 25 20.60 – V C57
2020-12-26 08:24:08 s 1 -134573.38 4 +354262.02 630.0 – C57
2020-12-26 08:34:08 S 06 57 15.238 -47 25 47.75 – V C57
2020-12-26 08:34:08 s 1 -134849.61 7 +353964.86 8810.0 – C57
2020-12-26 08:44:08 S 06 57 14.820 -47 26 12.12 – V C57
2020-12-26 08:44:08 s 1 -135125.49 0 +353666.76 6440.0 – C57
2020-12-26 08:54:08 S 06 57 14.306 -47 26 35.70 – V C57
2020-12-26 08:54:08 s 1 -135401.00 4 +353367.73 3510.0 – 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)