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
2020-12-20 04:14:08 s 1 +143592.46 1 +256256.31 4970.0 – C57
2020-12-20 04:24:08 S 07 02 49.822 -41 06 32.87 – V C57
2020-12-20 04:24:08 s 1 +143384.76 6 +256837.18 1610.0 – C57
2020-12-20 04:34:08 S 07 02 49.598 -41 06 58.32 – V C57
2020-12-20 04:34:08 s 1 +143176.25 8 +257416.61 7330.0 – C57
2020-12-20 04:44:08 S 07 02 49.320 -41 07 26.36 – V C57
2020-12-20 04:44:08 s 1 +142966.94 2 +257994.61 2120.0 – C57
2020-12-20 04:54:08 S 07 02 48.950 -41 07 52.32 – V C57
2020-12-20 04:54:08 s 1 +142756.82 1 +258571.17 6000.0 – C57
2020-12-20 05:04:08 S 07 02 48.850 -41 08 19.03 – V C57
2020-12-20 05:04:08 s 1 +142545.90 1 +259146.30 8960.0 – C57
2020-12-20 05:14:08 S 07 02 48.583 -41 08 45.31 – V C57
2020-12-20 05:14:08 s 1 +142334.18 6 +259720.00 1010.0 – C57
2020-12-20 05:24:08 S 07 02 48.499 -41 09 13.79 – V C57
2020-12-20 05:24:08 s 1 +142121.67 9 +260292.27 2160.0 – C57
2020-12-20 05:34:08 S 07 02 48.118 -41 09 39.71 – V C57
2020-12-20 05:34:08 s 1 +141908.38 6 +260863.11 2410.0 – C57
2020-12-20 05:44:08 S 07 02 47.743 -41 10 07.21 – V C57
2020-12-20 05:44:08 s 1 +141694.31 0 +261432.54 1780.0 – C57
2020-12-20 05:54:08 S 07 02 47.616 -41 10 33.42 – V C57
2020-12-20 05:54:08 s 1 +141479.45 6 +262000.54 250.0 – C57
2020-12-20 06:04:08 S 07 02 47.342 -41 11 00.74 – V C57
2020-12-20 06:04:08 s 1 +141263.82 8 +262567.13 7840.0 – C57
2020-12-20 06:14:08 S 07 02 47.160 -41 11 28.36 – V C57
2020-12-20 06:14:08 s 1 +141047.43 1 +263132.30 4560.0 – C57
2020-12-20 06:24:08 S 07 02 46.896 -41 11 55.03 – V C57
2020-12-20 06:24:08 s 1 +140830.26 8 +263696.06 400.0 – C57
2020-12-20 06:34:08 S 07 02 46.673 -41 12 22.18 – V C57
2020-12-20 06:34:08 s 1 +140612.34 3 +264258.42 5380.0 – C57
2020-12-20 06:44:08 S 07 02 46.392 -41 12 48.17 – V C57
2020-12-20 06:44:08 s 1 +140393.66 1 +264819.36 9490.0 – C57
2020-12-20 06:54:08 S 07 02 46.003 -41 13 15.96 – V C57
2020-12-20 06:54:08 s 1 +140174.22 6 +265378.90 2750.0 – C57
2020-12-20 07:04:08 S 07 02 45.941 -41 13 41.59 – V C57
2020-12-20 07:04:08 s 1 +139954.04 1 +265937.04 5150.0 – C57
2020-12-20 07:14:08 S 07 02 45.770 -41 14 07.48 – V C57
2020-12-20 07:14:08 s 1 +139733.11 1 +266493.78 6710.0 – C57
2020-12-20 07:24:08 S 07 02 45.370 -41 14 35.56 – V C57
2020-12-20 07:24:08 s 1 +139511.44 0 +267049.13 7430.0 – C57
2020-12-20 07:34:08 S 07 02 45.005 -41 15 02.41 – V C57
2020-12-20 07:34:08 s 1 +139289.03 2 +267603.08 7300.0 – C57
2020-12-20 07:44:08 S 07 02 44.798 -41 15 28.87 – V C57
2020-12-20 07:44:08 s 1 +139065.89 1 +268155.64 6350.0 – C57
2020-12-20 07:54:08 S 07 02 44.765 -41 15 57.20 – V C57
2020-12-20 07:54:08 s 1 +138842.02 0 +268706.81 4560.0 – C57
2020-12-20 08:04:08 S 07 02 44.530 -41 16 23.81 – V C57
2020-12-20 08:04:08 s 1 +138617.42 4 +269256.59 1950.0 – C57
2020-12-20 08:14:08 S 07 02 44.294 -41 16 49.98 – V C57
2020-12-20 08:14:08 s 1 +138392.10 6 +269804.99 8530.0 – C57
2020-12-20 08:24:08 S 07 02 43.860 -41 17 16.51 – 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)