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
2021-01-10 07:24:08 s 1 -175316.32 8 +286450.21 1500.0 – C57
2021-01-10 07:34:08 S 06 36 33.197 -60 47 58.42 – V C57
2021-01-10 07:34:08 s 1 -175498.08 5 +285982.54 5600.0 – C57
2021-01-10 07:44:08 S 06 36 32.191 -60 48 18.18 – V C57
2021-01-10 07:44:08 s 1 -175679.18 2 +285513.81 8630.0 – C57
2021-01-10 07:54:08 S 06 36 31.387 -60 48 36.54 – V C57
2021-01-10 07:54:08 s 1 -175859.61 5 +285044.03 590.0 – C57
2021-01-10 08:04:08 S 06 36 30.590 -60 48 55.80 – V C57
2021-01-10 08:04:08 s 1 -176039.38 3 +284573.18 1480.0 – C57
2021-01-10 08:14:08 S 06 36 29.460 -60 49 15.53 – V C57
2021-01-10 08:14:08 s 1 -176218.48 3 +284101.27 1300.0 – C57
2021-01-10 08:24:08 S 06 36 28.546 -60 49 34.14 – V C57
2021-01-10 08:24:08 s 1 -176396.91 3 +283628.30 40.0 – C57
2021-01-10 08:34:08 S 06 36 27.809 -60 49 52.93 – V C57
2021-01-10 08:34:08 s 1 -176574.67 0 +283154.27 7690.0 – C57
2021-01-10 08:44:08 S 06 36 26.820 -60 50 12.19 – V C57
2021-01-10 08:44:08 s 1 -176751.75 1 +282679.17 4250.0 – C57
2021-01-10 08:54:08 S 06 36 25.903 -60 50 31.60 – V C57
2021-01-10 08:54:08 s 1 -176928.15 4 +282203.01 9720.0 – C57
2021-01-10 09:04:08 S 06 36 25.234 -60 50 49.85 – V C57
2021-01-10 09:04:08 s 1 -177103.87 7 +281725.78 4090.0 – C57
2021-01-10 09:14:08 S 06 36 24.221 -60 51 09.68 – V C57
2021-01-10 09:14:08 s 1 -177278.91 7 +281247.48 7360.0 – C57
2021-01-10 09:24:08 S 06 36 23.131 -60 51 28.76 – V C57
2021-01-10 09:24:08 s 1 -177453.27 2 +280768.12 9520.0 – C57
2021-01-10 09:34:08 S 06 36 22.258 -60 51 47.20 – V C57
2021-01-10 09:34:08 s 1 -177626.93 8 +280287.68 580.0 – C57
2021-01-10 09:44:08 S 06 36 21.578 -60 52 07.36 – V C57
2021-01-10 09:44:08 s 1 -177799.91 3 +279806.17 510.0 – C57
2021-01-10 09:54:08 S 06 36 20.546 -60 52 25.61 – V C57
2021-01-10 09:54:08 s 1 -177972.19 6 +279323.59 9330.0 – C57
2021-01-10 10:04:08 S 06 36 19.778 -60 52 44.87 – V C57
2021-01-10 10:04:08 s 1 -178143.78 2 +278839.94 7020.0 – C57
2021-01-10 10:14:08 S 06 36 18.804 -60 53 02.87 – V C57
2021-01-10 10:14:08 s 1 -178314.67 0 +278355.21 3590.0 – C57
2021-01-10 10:24:08 S 06 36 17.976 -60 53 22.09 – V C57
2021-01-10 10:24:08 s 1 -178484.85 7 +277869.41 9020.0 – C57
2021-01-10 10:34:08 S 06 36 16.814 -60 53 41.10 – V C57
2021-01-10 10:34:08 s 1 -178654.34 0 +277382.53 3320.0 – C57
2021-01-10 10:44:08 S 06 36 16.306 -60 54 00.22 – V C57
2021-01-10 10:44:08 s 1 -178823.11 7 +276894.57 6470.0 – C57
2021-01-10 10:54:08 S 06 36 15.336 -60 54 18.76 – V C57
2021-01-10 10:54:08 s 1 -178991.18 4 +276405.53 8470.0 – C57
2021-01-10 11:04:08 S 06 36 14.155 -60 54 37.76 – V C57
2021-01-10 11:04:08 s 1 -179158.54 0 +275915.41 9330.0 – C57
2021-01-10 11:14:08 S 06 36 13.423 -60 54 56.52 – V C57
2021-01-10 11:14:08 s 1 -179325.18 2 +275424.20 9030.0 – C57
2021-01-10 11:24:08 S 06 36 12.672 -60 55 16.07 – V C57
2021-01-10 11:24:08 s 1 -179491.10 6 +274931.92 7560.0 – C57
2021-01-10 11:34:08 S 06 36 11.657 -60 55 34.86 – 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)