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
2021-01-25 09:54:07 S 05 55 15.410 -71 41 33.86 – V C57
2021-01-25 09:54:07 s 1 -193069.16 5 +113975.64 2090.0 – C57
2021-01-25 10:04:07 S 05 55 13.819 -71 41 47.58 – V C57
2021-01-25 10:04:07 s 1 -192910.18 3 +113177.19 870.0 – C57
2021-01-25 10:14:07 S 05 55 12.631 -71 42 01.87 – V C57
2021-01-25 10:14:07 s 1 -192748.80 9 +112377.34 5380.0 – C57
2021-01-25 10:24:07 S 05 55 10.987 -71 42 16.34 – V C57
2021-01-25 10:24:07 s 1 -192585.02 6 +111576.09 5600.0 – C57
2021-01-25 10:34:07 S 05 55 09.206 -71 42 29.27 – V C57
2021-01-25 10:34:07 s 1 -192418.82 0 +110773.45 1500.0 – C57
2021-01-25 10:44:07 S 05 55 07.879 -71 42 44.14 – V C57
2021-01-25 10:44:07 s 1 -192250.17 5 +109969.41 3050.0 – C57
2021-01-25 10:54:07 S 05 55 06.334 -71 42 58.54 – V C57
2021-01-25 10:54:07 s 1 -192079.07 6 +109163.98 220.0 – C57
2021-01-25 11:04:07 S 05 55 04.925 -71 43 13.12 – V C57
2021-01-25 11:04:07 s 1 -191905.50 7 +108357.15 2980.0 – C57
2021-01-25 11:14:07 S 05 55 03.094 -71 43 27.41 – V C57
2021-01-25 11:14:07 s 1 -191729.45 1 +107548.92 1310.0 – C57
2021-01-25 11:24:07 S 05 55 01.925 -71 43 41.02 – V C57
2021-01-25 11:24:07 s 1 -191550.89 4 +106739.30 5180.0 – C57
2021-01-25 11:34:07 S 05 55 00.317 -71 43 55.27 – V C57
2021-01-25 11:34:07 s 1 -191369.81 8 +105928.28 4550.0 – C57
2021-01-25 11:44:07 S 05 54 58.694 -71 44 09.49 – V C57
2021-01-25 11:44:07 s 1 -191186.20 7 +105115.87 9400.0 – C57
2021-01-25 11:54:07 S 05 54 57.240 -71 44 22.96 – V C57
2021-01-25 11:54:07 s 1 -191000.04 5 +104302.06 9690.0 – C57
2021-01-25 12:04:07 S 05 54 55.829 -71 44 37.72 – V C57
2021-01-25 12:04:07 s 1 -190811.31 5 +103486.85 5400.0 – C57
2021-01-25 12:14:07 S 05 54 54.442 -71 44 53.20 – V C57
2021-01-25 12:14:07 s 1 -190620.00 0 +102670.26 6490.0 – C57
2021-01-25 12:24:07 S 05 54 52.709 -71 45 06.70 – V C57
2021-01-25 12:24:07 s 1 -190426.08 4 +101852.26 2940.0 – C57
2021-01-25 12:34:07 S 05 54 51.276 -71 45 20.45 – V C57
2021-01-25 12:34:07 s 1 -190229.54 8 +101032.88 4710.0 – C57
2021-01-25 12:44:07 S 05 54 49.618 -71 45 34.52 – V C57
2021-01-25 12:44:07 s 1 -190030.37 6 +100212.10 1770.0 – C57
2021-01-25 12:54:07 S 05 54 48.384 -71 45 47.88 – V C57
2021-01-25 12:54:07 s 1 -189828.55 0 +99389.931 4090.0 – C57
2021-01-25 13:04:07 S 05 54 46.726 -71 46 03.32 – V C57
2021-01-25 13:04:07 s 1 -189624.05 2 +98566.368 1640.0 – C57
2021-01-25 13:14:07 S 05 54 45.286 -71 46 17.83 – V C57
2021-01-25 13:14:07 s 1 -189416.86 4 +97741.415 4380.0 – C57
2021-01-25 13:24:07 S 05 54 43.810 -71 46 31.12 – V C57
2021-01-25 13:24:07 s 1 -189206.96 9 +96915.072 2280.0 – C57
2021-01-25 13:34:07 S 05 54 42.245 -71 46 45.80 – V C57
2021-01-25 13:34:07 s 1 -188994.34 9 +96087.340 5310.0 – C57
2021-01-25 13:44:07 S 05 54 40.663 -71 46 59.77 – V C57
2021-01-25 13:44:07 s 1 -188778.98 4 +95258.220 3440.0 – C57
2021-01-25 13:54:07 S 05 54 39.096 -71 47 13.20 – V C57
2021-01-25 13:54:07 s 1 -188560.85 6 +94427.713 6620.0 – 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)