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
2021-01-04 17:44:08 S 06 47 26.604 -56 06 42.84 – V C57
2021-01-04 17:44:08 s 1 +67089.051 0 +364961.96 7680.0 – C57
2021-01-04 17:54:08 S 06 47 25.807 -56 07 06.02 – V C57
2021-01-04 17:54:08 s 1 +66764.967 0 +365228.93 180.0 – C57
2021-01-04 18:04:08 S 06 47 25.102 -56 07 29.42 – V C57
2021-01-04 18:04:08 s 1 +66440.699 0 +365494.89 2440.0 – C57
2021-01-04 18:14:08 S 06 47 24.437 -56 07 51.92 – V C57
2021-01-04 18:14:08 s 1 +66116.248 0 +365759.82 4450.0 – C57
2021-01-04 18:24:08 S 06 47 23.786 -56 08 14.68 – V C57
2021-01-04 18:24:08 s 1 +65791.617 0 +366023.74 6230.0 – C57
2021-01-04 18:34:08 S 06 47 23.035 -56 08 37.82 – V C57
2021-01-04 18:34:08 s 1 +65466.805 0 +366286.64 7760.0 – C57
2021-01-04 18:44:08 S 06 47 22.356 -56 09 00.54 – V C57
2021-01-04 18:44:08 s 1 +65141.815 0 +366548.51 9060.0 – C57
2021-01-04 18:54:08 S 06 47 21.718 -56 09 22.57 – V C57
2021-01-04 18:54:08 s 1 +64816.647 0 +366809.38 120.0 – C57
2021-01-04 19:04:08 S 06 47 20.849 -56 09 46.94 – V C57
2021-01-04 19:04:08 s 1 +64491.303 0 +367069.23 950.0 – C57
2021-01-04 19:14:08 S 06 47 20.196 -56 10 08.58 – V C57
2021-01-04 19:14:08 s 1 +64165.784 0 +367328.06 1550.0 – C57
2021-01-04 19:34:08 S 06 47 18.862 -56 10 53.76 – V C57
2021-01-04 19:34:08 s 1 +63514.225 0 +367842.69 2050.0 – C57
2021-01-04 19:44:08 S 06 47 18.173 -56 11 16.98 – V C57
2021-01-04 19:44:08 s 1 +63188.187 0 +368098.48 1960.0 – C57
2021-01-04 19:54:08 S 06 47 17.573 -56 11 38.90 – V C57
2021-01-04 19:54:08 s 1 +62861.979 0 +368353.26 1640.0 – C57
2021-01-04 20:04:08 S 06 47 16.656 -56 12 02.66 – V C57
2021-01-04 20:04:08 s 1 +62535.603 0 +368607.04 1100.0 – C57
2021-01-04 20:14:08 S 06 47 15.994 -56 12 24.70 – V C57
2021-01-04 20:14:08 s 1 +62209.058 0 +368859.80 330.0 – C57
2021-01-04 20:24:08 S 06 47 15.317 -56 12 47.84 – V C57
2021-01-04 20:24:08 s 1 +61882.346 0 +369111.56 9350.0 – C57
2021-01-04 20:34:08 S 06 47 14.642 -56 13 11.03 – V C57
2021-01-04 20:34:08 s 1 +61555.468 0 +369362.31 8140.0 – C57
2021-01-04 20:44:08 S 06 47 13.915 -56 13 33.71 – V C57
2021-01-04 20:44:08 s 1 +61228.426 0 +369612.06 6720.0 – C57
2021-01-04 20:54:08 S 06 47 13.320 -56 13 56.68 – V C57
2021-01-04 20:54:08 s 1 +60901.221 0 +369860.79 5080.0 – C57
2021-01-04 21:04:08 S 06 47 12.540 -56 14 18.85 – V C57
2021-01-04 21:04:08 s 1 +60573.854 0 +370108.53 3220.0 – C57
2021-01-04 21:14:08 S 06 47 11.796 -56 14 41.82 – V C57
2021-01-04 21:14:08 s 1 +60246.325 0 +370355.26 1160.0 – C57
2021-01-04 21:24:08 S 06 47 11.198 -56 15 03.82 – V C57
2021-01-04 21:24:08 s 1 +59918.637 0 +370600.99 8880.0 – C57
2021-01-04 21:34:08 S 06 47 10.375 -56 15 27.04 – V C57
2021-01-04 21:34:08 s 1 +59590.790 0 +370845.71 6390.0 – C57
2021-01-04 21:44:08 S 06 47 09.658 -56 15 50.15 – V C57
2021-01-04 21:44:08 s 1 +59262.786 0 +371089.43 3690.0 – C57
2021-01-04 21:54:08 S 06 47 09.149 -56 16 12.36 – V C57
2021-01-04 21:54:08 s 1 +58934.625 0 +371332.16 780.0 – 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)