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
2021-01-05 15:04:08 S 06 45 54.708 -56 54 47.63 – V C57
2021-01-05 15:04:08 s 1 +24494.304 0 +391122.45 9950.0 – C57
2021-01-05 15:14:08 S 06 45 53.803 -56 55 10.56 – V C57
2021-01-05 15:14:08 s 1 +24155.512 0 +391265.27 3130.0 – C57
2021-01-05 15:24:08 S 06 45 53.038 -56 55 33.20 – V C57
2021-01-05 15:24:08 s 1 +23816.667 0 +391407.17 6240.0 – C57
2021-01-05 15:34:08 S 06 45 52.440 -56 55 55.24 – V C57
2021-01-05 15:34:08 s 1 +23477.771 0 +391548.14 9290.0 – C57
2021-01-05 15:44:08 S 06 45 51.490 -56 56 17.34 – V C57
2021-01-05 15:44:08 s 1 +23138.823 0 +391688.19 2270.0 – C57
2021-01-05 15:54:08 S 06 45 50.796 -56 56 40.06 – V C57
2021-01-05 15:54:08 s 1 +22799.825 0 +391827.31 5180.0 – C57
2021-01-05 16:04:08 S 06 45 50.249 -56 57 01.26 – V C57
2021-01-05 16:04:08 s 1 +22460.778 0 +391965.51 8040.0 – C57
2021-01-05 16:14:08 S 06 45 49.339 -56 57 24.84 – V C57
2021-01-05 16:14:08 s 1 +22121.682 0 +392102.78 830.0 – C57
2021-01-05 16:24:08 S 06 45 48.550 -56 57 46.62 – V C57
2021-01-05 16:24:08 s 1 +21782.539 0 +392239.13 3560.0 – C57
2021-01-05 16:34:08 S 06 45 48.002 -56 58 08.36 – V C57
2021-01-05 16:34:08 s 1 +21443.349 0 +392374.56 6240.0 – C57
2021-01-05 16:44:08 S 06 45 47.150 -56 58 31.44 – V C57
2021-01-05 16:44:08 s 1 +21104.113 0 +392509.06 8860.0 – C57
2021-01-05 16:54:08 S 06 45 46.394 -56 58 53.58 – V C57
2021-01-05 16:54:08 s 1 +20764.832 0 +392642.65 8580.0 – C57
2021-01-05 17:04:08 S 06 45 45.703 -56 59 15.68 – V C57
2021-01-05 17:04:08 s 1 +20425.507 0 +392775.31 6080.0 – C57
2021-01-05 17:14:08 S 06 45 44.890 -56 59 37.36 – V C57
2021-01-05 17:14:08 s 1 +20086.139 0 +392907.05 3630.0 – C57
2021-01-05 17:24:08 S 06 45 44.134 -56 59 59.46 – V C57
2021-01-05 17:24:08 s 1 +19746.728 0 +393037.87 1230.0 – C57
2021-01-05 17:34:08 S 06 45 43.414 -57 00 22.39 – V C57
2021-01-05 17:34:08 s 1 +19407.276 0 +393167.77 8880.0 – C57
2021-01-05 17:44:08 S 06 45 42.718 -57 00 44.06 – V C57
2021-01-05 17:44:08 s 1 +19067.783 0 +393296.75 6580.0 – C57
2021-01-05 17:54:08 S 06 45 41.890 -57 01 06.64 – V C57
2021-01-05 17:54:08 s 1 +18728.249 0 +393424.82 4340.0 – C57
2021-01-05 18:04:08 S 06 45 41.210 -57 01 28.16 – V C57
2021-01-05 18:04:08 s 1 +18388.677 0 +393551.96 2140.0 – C57
2021-01-05 18:14:08 S 06 45 40.574 -57 01 50.12 – V C57
2021-01-05 18:14:08 s 1 +18049.067 0 +393678.19 9980.0 – C57
2021-01-05 18:24:08 S 06 45 39.617 -57 02 13.24 – V C57
2021-01-05 18:24:08 s 1 +17709.419 0 +393803.50 7880.0 – C57
2021-01-05 18:34:08 S 06 45 38.921 -57 02 35.38 – V C57
2021-01-05 18:34:08 s 1 +17369.735 0 +393927.90 5820.0 – C57
2021-01-05 18:44:08 S 06 45 38.304 -57 02 56.98 – V C57
2021-01-05 18:44:08 s 1 +17030.014 0 +394051.37 3800.0 – C57
2021-01-05 18:54:08 S 06 45 37.394 -57 03 19.22 – V C57
2021-01-05 18:54:08 s 1 +16690.259 0 +394173.94 1820.0 – C57
2021-01-05 19:04:08 S 06 45 36.708 -57 03 42.08 – V C57
2021-01-05 19:04:08 s 1 +16350.470 0 +394295.58 9890.0 – 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)