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
2020-12-28 07:24:08 S 06 54 57.526 -49 15 34.56 – V C57
2020-12-28 07:24:08 s 1 -192146.07 0 +230938.65 9460.0 – C57
2020-12-28 07:34:08 S 06 54 57.074 -49 15 56.84 – V C57
2020-12-28 07:34:08 s 1 -192247.87 1 +230347.48 3630.0 – C57
2020-12-28 07:44:08 S 06 54 56.599 -49 16 19.06 – V C57
2020-12-28 07:44:08 s 1 -192348.65 3 +229755.11 6270.0 – C57
2020-12-28 07:54:08 S 06 54 56.062 -49 16 42.24 – V C57
2020-12-28 07:54:08 s 1 -192448.41 3 +229161.53 7370.0 – C57
2020-12-28 08:04:08 S 06 54 55.502 -49 17 04.60 – V C57
2020-12-28 08:04:08 s 1 -192547.14 6 +228566.74 6940.0 – C57
2020-12-28 08:14:08 S 06 54 55.128 -49 17 28.46 – V C57
2020-12-28 08:14:08 s 1 -192644.84 7 +227970.75 4960.0 – C57
2020-12-28 08:24:08 S 06 54 54.617 -49 17 50.89 – V C57
2020-12-28 08:24:08 s 1 -192741.51 2 +227373.55 1420.0 – C57
2020-12-28 08:34:08 S 06 54 54.086 -49 18 12.89 – V C57
2020-12-28 08:34:08 s 1 -192837.13 7 +226775.14 6330.0 – C57
2020-12-28 08:44:08 S 06 54 53.486 -49 18 36.29 – V C57
2020-12-28 08:44:08 s 1 -192931.71 6 +226175.52 9660.0 – C57
2020-12-28 08:54:08 S 06 54 52.956 -49 18 58.21 – V C57
2020-12-28 08:54:08 s 1 -193025.24 6 +225574.68 1420.0 – C57
2020-12-28 09:04:08 S 06 54 52.687 -49 19 21.79 – V C57
2020-12-28 09:04:08 s 1 -193117.72 1 +224972.63 1600.0 – C57
2020-12-28 09:14:08 S 06 54 52.099 -49 19 44.11 – V C57
2020-12-28 09:14:08 s 1 -193209.13 7 +224369.36 190.0 – C57
2020-12-28 09:24:08 S 06 54 51.557 -49 20 07.12 – V C57
2020-12-28 09:24:08 s 1 -193299.49 0 +223764.87 7180.0 – C57
2020-12-28 09:34:08 S 06 54 51.142 -49 20 28.90 – V C57
2020-12-28 09:34:08 s 1 -193388.77 4 +223159.17 2570.0 – C57
2020-12-28 09:44:08 S 06 54 50.731 -49 20 51.32 – V C57
2020-12-28 09:44:08 s 1 -193476.98 5 +222552.24 6350.0 – C57
2020-12-28 09:54:08 S 06 54 50.006 -49 21 14.29 – V C57
2020-12-28 09:54:08 s 1 -193564.11 8 +221944.08 8510.0 – C57
2020-12-28 10:04:08 S 06 54 49.488 -49 21 37.94 – V C57
2020-12-28 10:04:08 s 1 -193650.16 9 +221334.71 9050.0 – C57
2020-12-28 10:14:08 S 06 54 48.991 -49 22 00.41 – V C57
2020-12-28 10:14:08 s 1 -193735.13 2 +220724.10 7950.0 – C57
2020-12-28 10:24:08 S 06 54 48.638 -49 22 22.66 – V C57
2020-12-28 10:24:08 s 1 -193819.00 2 +220112.27 5220.0 – C57
2020-12-28 10:34:08 S 06 54 48.036 -49 22 44.94 – V C57
2020-12-28 10:34:08 s 1 -193901.77 6 +219499.21 840.0 – C57
2020-12-28 10:44:08 S 06 54 47.570 -49 23 07.58 – V C57
2020-12-28 10:44:08 s 1 -193983.44 7 +218884.92 4810.0 – C57
2020-12-28 10:54:08 S 06 54 47.126 -49 23 30.52 – V C57
2020-12-28 10:54:08 s 1 -194064.01 1 +218269.40 7120.0 – C57
2020-12-28 11:04:08 S 06 54 46.663 -49 23 53.12 – V C57
2020-12-28 11:04:08 s 1 -194143.46 2 +217652.64 7760.0 – C57
2020-12-28 11:14:08 S 06 54 46.106 -49 24 16.16 – V C57
2020-12-28 11:14:08 s 1 -194221.79 7 +217034.64 6720.0 – C57
2020-12-28 11:24:08 S 06 54 45.588 -49 24 37.04 – V C57
2020-12-28 11:24:08 s 1 -194299.00 9 +216415.41 4000.0 – 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)