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
2021-01-21 17:04:08 S 06 09 11.381 -69 22 43.54 – V C57
2021-01-21 17:04:08 s 1 -112314.07 7 +369666.27 5010.0 – C57
2021-01-21 17:14:08 S 06 09 09.773 -69 23 00.06 – V C57
2021-01-21 17:14:08 s 1 -112618.99 5 +369458.59 3470.0 – C57
2021-01-21 17:24:08 S 06 09 08.278 -69 23 16.84 – V C57
2021-01-21 17:24:08 s 1 -112923.64 0 +369249.99 1480.0 – C57
2021-01-21 17:34:08 S 06 09 06.636 -69 23 32.50 – V C57
2021-01-21 17:34:08 s 1 -113228.01 1 +369040.48 9030.0 – C57
2021-01-21 17:44:08 S 06 09 05.306 -69 23 49.74 – V C57
2021-01-21 17:44:08 s 1 -113532.10 7 +368830.04 6110.0 – C57
2021-01-21 17:54:08 S 06 09 03.590 -69 24 07.02 – V C57
2021-01-21 17:54:08 s 1 -113835.92 7 +368618.69 2730.0 – C57
2021-01-21 18:04:08 S 06 09 02.328 -69 24 24.01 – V C57
2021-01-21 18:04:08 s 1 -114139.46 9 +368406.42 8890.0 – C57
2021-01-21 18:14:08 S 06 09 00.859 -69 24 42.12 – V C57
2021-01-21 18:14:08 s 1 -114442.73 3 +368193.22 4570.0 – C57
2021-01-21 18:24:08 S 06 08 59.388 -69 24 58.61 – V C57
2021-01-21 18:24:08 s 1 -114745.71 8 +367979.11 9790.0 – C57
2021-01-21 18:34:08 S 06 08 57.686 -69 25 14.48 – V C57
2021-01-21 18:34:08 s 1 -115048.42 3 +367764.08 4540.0 – C57
2021-01-21 18:44:08 S 06 08 56.045 -69 25 31.01 – V C57
2021-01-21 18:44:08 s 1 -115350.84 6 +367548.12 8810.0 – C57
2021-01-21 18:54:08 S 06 08 54.494 -69 25 48.14 – V C57
2021-01-21 18:54:08 s 1 -115652.98 6 +367331.25 2610.0 – C57
2021-01-21 19:04:08 S 06 08 53.141 -69 26 04.42 – V C57
2021-01-21 19:04:08 s 1 -115954.84 4 +367113.45 5940.0 – C57
2021-01-21 19:14:08 S 06 08 51.768 -69 26 21.73 – V C57
2021-01-21 19:14:08 s 1 -116256.41 7 +366894.73 8780.0 – C57
2021-01-21 19:24:08 S 06 08 50.270 -69 26 38.76 – V C57
2021-01-21 19:24:08 s 1 -116557.70 4 +366675.09 1150.0 – C57
2021-01-21 19:34:08 S 06 08 48.586 -69 26 56.40 – V C57
2021-01-21 19:34:08 s 1 -116858.70 5 +366454.53 3030.0 – C57
2021-01-21 19:44:08 S 06 08 47.105 -69 27 12.31 – V C57
2021-01-21 19:44:08 s 1 -117159.41 8 +366233.05 4430.0 – C57
2021-01-21 19:54:08 S 06 08 45.480 -69 27 28.51 – V C57
2021-01-21 19:54:08 s 1 -117459.84 3 +366010.64 5350.0 – C57
2021-01-21 20:04:08 S 06 08 44.117 -69 27 45.36 – V C57
2021-01-21 20:04:08 s 1 -117759.97 8 +365787.31 5770.0 – C57
2021-01-21 20:14:08 S 06 08 42.602 -69 28 02.53 – V C57
2021-01-21 20:14:08 s 1 -118059.82 2 +365563.06 5710.0 – C57
2021-01-21 20:24:08 S 06 08 41.254 -69 28 20.28 – V C57
2021-01-21 20:24:08 s 1 -118359.37 5 +365337.89 5160.0 – C57
2021-01-21 20:34:07 S 06 08 39.487 -69 28 36.44 – V C57
2021-01-21 20:34:07 s 1 -118658.63 4 +365111.79 4110.0 – C57
2021-01-21 20:44:08 S 06 08 38.122 -69 28 52.10 – V C57
2021-01-21 20:44:08 s 1 -118957.60 0 +364884.77 2570.0 – C57
2021-01-21 20:54:08 S 06 08 36.331 -69 29 09.24 – V C57
2021-01-21 20:54:08 s 1 -119256.27 1 +364656.82 530.0 – C57
2021-01-21 21:04:08 S 06 08 34.824 -69 29 25.91 – V C57
2021-01-21 21:04:08 s 1 -119554.64 6 +364427.95 8000.0 – 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)