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
2021-01-28 15:04:07 s 1 +153416.72 8 +122027.72 1360.0 – C57
2021-01-28 15:14:07 S 05 45 33.982 -73 49 10.42 – V C57
2021-01-28 15:14:07 s 1 +153456.73 1 +122944.55 9640.0 – C57
2021-01-28 15:24:07 S 05 45 32.194 -73 49 30.79 – V C57
2021-01-28 15:24:07 s 1 +153493.92 1 +123859.11 2780.0 – C57
2021-01-28 15:34:07 S 05 45 30.120 -73 49 50.38 – V C57
2021-01-28 15:34:07 s 1 +153528.32 5 +124771.42 820.0 – C57
2021-01-28 15:44:07 S 05 45 28.272 -73 50 09.60 – V C57
2021-01-28 15:44:07 s 1 +153559.96 5 +125681.48 3790.0 – C57
2021-01-28 15:54:07 S 05 45 26.203 -73 50 28.14 – V C57
2021-01-28 15:54:07 s 1 +153588.86 6 +126589.29 1760.0 – C57
2021-01-28 16:04:07 S 05 45 24.331 -73 50 46.14 – V C57
2021-01-28 16:04:07 s 1 +153615.05 1 +127494.86 4750.0 – C57
2021-01-28 16:14:07 S 05 45 22.320 -73 51 05.80 – V C57
2021-01-28 16:14:07 s 1 +153638.54 4 +128398.18 2810.0 – C57
2021-01-28 16:24:07 S 05 45 20.150 -73 51 24.41 – V C57
2021-01-28 16:24:07 s 1 +153659.36 8 +129299.27 5980.0 – C57
2021-01-28 16:34:07 S 05 45 18.286 -73 51 44.17 – V C57
2021-01-28 16:34:07 s 1 +153677.54 5 +130198.13 4310.0 – C57
2021-01-28 16:44:07 S 05 45 16.262 -73 52 04.19 – V C57
2021-01-28 16:44:07 s 1 +153693.09 9 +131094.76 7830.0 – C57
2021-01-28 16:54:07 S 05 45 14.040 -73 52 22.01 – V C57
2021-01-28 16:54:07 s 1 +153706.05 1 +131989.16 6580.0 – C57
2021-01-28 17:04:07 S 05 45 12.298 -73 52 41.99 – V C57
2021-01-28 17:04:07 s 1 +153716.42 5 +132881.34 610.0 – C57
2021-01-28 17:14:07 S 05 45 10.378 -73 52 59.59 – V C57
2021-01-28 17:14:07 s 1 +153724.24 0 +133771.31 9960.0 – C57
2021-01-28 17:24:07 S 05 45 08.184 -73 53 19.21 – V C57
2021-01-28 17:24:07 s 1 +153729.52 0 +134659.06 4660.0 – C57
2021-01-28 17:34:07 S 05 45 06.247 -73 53 37.97 – V C57
2021-01-28 17:34:07 s 1 +153732.28 4 +135544.60 4750.0 – C57
2021-01-28 17:44:07 S 05 45 04.289 -73 53 57.73 – V C57
2021-01-28 17:44:07 s 1 +153732.55 6 +136427.94 270.0 – C57
2021-01-28 17:54:07 S 05 45 02.333 -73 54 16.27 – V C57
2021-01-28 17:54:07 s 1 +153730.35 4 +137309.08 1260.0 – C57
2021-01-28 18:04:07 S 05 45 00.146 -73 54 35.60 – V C57
2021-01-28 18:04:07 s 1 +153725.70 1 +138188.03 7750.0 – C57
2021-01-28 18:14:07 S 05 44 58.025 -73 54 54.11 – V C57
2021-01-28 18:14:07 s 1 +153718.61 5 +139064.78 9790.0 – C57
2021-01-28 18:24:07 S 05 44 56.040 -73 55 13.01 – V C57
2021-01-28 18:24:07 s 1 +153709.11 8 +139939.34 7410.0 – C57
2021-01-28 18:34:07 S 05 44 54.139 -73 55 31.66 – V C57
2021-01-28 18:34:07 s 1 +153697.22 9 +140811.72 640.0 – C57
2021-01-28 18:44:07 S 05 44 52.109 -73 55 51.60 – V C57
2021-01-28 18:44:07 s 1 +153682.96 8 +141681.93 9530.0 – C57
2021-01-28 18:54:07 S 05 44 50.021 -73 56 10.36 – V C57
2021-01-28 18:54:07 s 1 +153666.35 4 +142549.95 4100.0 – C57
2021-01-28 19:04:07 S 05 44 47.746 -73 56 29.83 – V C57
2021-01-28 19:04:07 s 1 +153647.40 7 +143415.81 4390.0 – C57
2021-01-28 19:14:07 S 05 44 45.691 -73 56 48.48 – 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)