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
2021-01-11 14:54:08 s 1 -194383.37 8 +177800.73 7500.0 – C57
2021-01-11 15:04:08 S 06 33 44.863 -61 46 19.27 – V C57
2021-01-11 15:04:08 s 1 -194376.92 3 +177108.19 1480.0 – C57
2021-01-11 15:14:08 S 06 33 43.678 -61 46 36.88 – V C57
2021-01-11 15:14:08 s 1 -194368.97 1 +176414.30 2950.0 – C57
2021-01-11 15:24:08 S 06 33 43.073 -61 46 53.58 – V C57
2021-01-11 15:24:08 s 1 -194359.51 2 +175719.05 1900.0 – C57
2021-01-11 15:34:08 S 06 33 42.276 -61 47 13.34 – V C57
2021-01-11 15:34:08 s 1 -194348.53 9 +175022.45 8320.0 – C57
2021-01-11 15:44:08 S 06 33 41.426 -61 47 30.77 – V C57
2021-01-11 15:44:08 s 1 -194336.04 5 +174324.50 2190.0 – C57
2021-01-11 15:54:08 S 06 33 40.378 -61 47 51.36 – V C57
2021-01-11 15:54:08 s 1 -194322.02 0 +173625.18 3500.0 – C57
2021-01-11 16:04:08 S 06 33 39.653 -61 48 04.50 – V C57
2021-01-11 16:04:08 s 1 -194306.45 7 +172924.51 2240.0 – C57
2021-01-11 16:14:08 S 06 33 39.139 -61 48 20.88 – V C57
2021-01-11 16:14:08 s 1 -194289.34 7 +172222.47 8380.0 – C57
2021-01-11 16:24:08 S 06 33 37.632 -61 48 44.93 – V C57
2021-01-11 16:24:08 s 1 -194270.68 2 +171519.07 1920.0 – C57
2021-01-11 16:34:08 S 06 33 36.830 -61 49 00.66 – V C57
2021-01-11 16:34:08 s 1 -194250.45 5 +170814.30 2840.0 – C57
2021-01-11 16:44:08 S 06 33 35.974 -61 49 18.52 – V C57
2021-01-11 16:44:08 s 1 -194228.65 5 +170108.17 1120.0 – C57
2021-01-11 16:54:08 S 06 33 35.244 -61 49 35.29 – V C57
2021-01-11 16:54:08 s 1 -194205.27 6 +169400.66 6760.0 – C57
2021-01-11 17:04:08 S 06 33 34.409 -61 49 52.57 – V C57
2021-01-11 17:04:08 s 1 -194180.30 7 +168691.79 9740.0 – C57
2021-01-11 17:14:08 S 06 33 33.180 -61 50 10.90 – V C57
2021-01-11 17:14:08 s 1 -194153.74 2 +167981.54 30.0 – C57
2021-01-11 17:24:08 S 06 33 32.587 -61 50 28.90 – V C57
2021-01-11 17:24:08 s 1 -194125.57 0 +167269.91 7640.0 – C57
2021-01-11 17:34:08 S 06 33 31.819 -61 50 46.39 – V C57
2021-01-11 17:34:08 s 1 -194095.78 3 +166556.90 2530.0 – C57
2021-01-11 17:44:08 S 06 33 30.766 -61 51 04.28 – V C57
2021-01-11 17:44:08 s 1 -194064.37 3 +165842.52 4700.0 – C57
2021-01-11 17:54:08 S 06 33 29.786 -61 51 22.75 – V C57
2021-01-11 17:54:08 s 1 -194031.33 0 +165126.75 4140.0 – C57
2021-01-11 18:04:08 S 06 33 29.189 -61 51 40.00 – V C57
2021-01-11 18:04:08 s 1 -193996.64 5 +164409.61 820.0 – C57
2021-01-11 18:14:08 S 06 33 28.344 -61 51 58.32 – V C57
2021-01-11 18:14:08 s 1 -193960.31 0 +163691.07 4730.0 – C57
2021-01-11 18:24:08 S 06 33 27.300 -61 52 16.68 – V C57
2021-01-11 18:24:08 s 1 -193922.31 5 +162971.15 5850.0 – C57
2021-01-11 18:34:08 S 06 33 26.508 -61 52 32.99 – V C57
2021-01-11 18:34:08 s 1 -193882.65 1 +162249.84 4180.0 – C57
2021-01-11 18:44:08 S 06 33 25.716 -61 52 51.60 – V C57
2021-01-11 18:44:08 s 1 -193841.30 8 +161527.14 9680.0 – C57
2021-01-11 18:54:08 S 06 33 24.809 -61 53 09.71 – V C57
2021-01-11 18:54:08 s 1 -193798.27 7 +160803.05 2350.0 – C57
2021-01-11 19:04:08 S 06 33 23.791 -61 53 27.06 – V 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)