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
2020-12-25 03:34:08 S 06 58 35.330 -46 14 58.81 – V C57
2020-12-25 03:34:08 s 1 -82357.669 0 +392041.11 1920.0 – C57
2020-12-25 03:44:08 S 06 58 34.961 -46 15 23.65 – V C57
2020-12-25 03:44:08 s 1 -82679.832 0 +391899.00 3170.0 – C57
2020-12-25 03:54:08 S 06 58 34.469 -46 15 47.66 – V C57
2020-12-25 03:54:08 s 1 -83001.811 0 +391756.02 4120.0 – C57
2020-12-25 04:04:08 S 06 58 34.128 -46 16 13.33 – V C57
2020-12-25 04:04:08 s 1 -83323.604 0 +391612.16 4750.0 – C57
2020-12-25 04:14:08 S 06 58 33.547 -46 16 37.24 – V C57
2020-12-25 04:14:08 s 1 -83645.211 0 +391467.44 5080.0 – C57
2020-12-25 04:24:08 S 06 58 33.046 -46 17 03.12 – V C57
2020-12-25 04:24:08 s 1 -83966.631 0 +391321.83 5100.0 – C57
2020-12-25 04:34:08 S 06 58 32.834 -46 17 27.46 – V C57
2020-12-25 04:34:08 s 1 -84287.863 0 +391175.36 4800.0 – C57
2020-12-25 04:44:08 S 06 58 32.304 -46 17 45.71 – V C57
2020-12-25 04:44:08 s 1 -84608.906 0 +391028.01 4190.0 – C57
2020-12-25 04:54:08 S 06 58 31.783 -46 18 18.47 – V C57
2020-12-25 04:54:08 s 1 -84929.760 0 +390879.79 3270.0 – C57
2020-12-25 05:04:08 S 06 58 31.392 -46 18 42.05 – V C57
2020-12-25 05:04:08 s 1 -85250.423 0 +390730.69 2030.0 – C57
2020-12-25 05:14:08 S 06 58 30.996 -46 19 05.41 – V C57
2020-12-25 05:14:08 s 1 -85570.895 0 +390580.72 470.0 – C57
2020-12-25 05:24:08 S 06 58 30.514 -46 19 30.25 – V C57
2020-12-25 05:24:08 s 1 -85891.174 0 +390429.87 8600.0 – C57
2020-12-25 05:34:08 S 06 58 29.954 -46 19 54.48 – V C57
2020-12-25 05:34:08 s 1 -86211.260 0 +390278.15 6410.0 – C57
2020-12-25 05:44:08 S 06 58 29.606 -46 20 19.43 – V C57
2020-12-25 05:44:08 s 1 -86531.153 0 +390125.55 3890.0 – C57
2020-12-25 05:54:08 S 06 58 29.146 -46 20 43.91 – V C57
2020-12-25 05:54:08 s 1 -86850.850 0 +389972.07 1060.0 – C57
2020-12-25 06:04:08 S 06 58 28.714 -46 21 08.93 – V C57
2020-12-25 06:04:08 s 1 -87170.352 0 +389817.73 7900.0 – C57
2020-12-25 06:14:08 S 06 58 28.210 -46 21 34.49 – V C57
2020-12-25 06:14:08 s 1 -87489.658 0 +389662.50 4410.0 – C57
2020-12-25 06:24:08 S 06 58 27.754 -46 21 57.74 – V C57
2020-12-25 06:24:08 s 1 -87808.766 0 +389506.40 610.0 – C57
2020-12-25 06:34:08 S 06 58 27.420 -46 22 23.59 – V C57
2020-12-25 06:34:08 s 1 -88127.676 0 +389349.43 6470.0 – C57
2020-12-25 06:44:08 S 06 58 26.933 -46 22 48.83 – V C57
2020-12-25 06:44:08 s 1 -88446.387 0 +389191.57 2010.0 – C57
2020-12-25 06:54:08 S 06 58 26.431 -46 23 12.19 – V C57
2020-12-25 06:54:08 s 1 -88764.898 0 +389032.85 7220.0 – C57
2020-12-25 07:04:08 S 06 58 26.078 -46 23 36.71 – V C57
2020-12-25 07:04:08 s 1 -89083.208 0 +388873.24 2090.0 – C57
2020-12-25 07:14:08 S 06 58 25.637 -46 24 01.58 – V C57
2020-12-25 07:14:08 s 1 -89401.317 0 +388712.76 6640.0 – C57
2020-12-25 07:24:08 S 06 58 25.075 -46 24 26.68 – V C57
2020-12-25 07:24:08 s 1 -89719.223 0 +388551.40 850.0 – C57
2020-12-25 07:34:08 S 06 58 24.571 -46 24 51.66 – V C57
2020-12-25 07:34:08 s 1 -90036.926 0 +388389.16 4730.0 – 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)