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
2021-01-03 06:34:08 S 06 49 43.858 -54 44 47.26 – V C57
2021-01-03 06:34:08 s 1 +128932.68 4 +283888.27 2160.0 – C57
2021-01-03 06:44:08 S 06 49 43.092 -54 45 13.10 – V C57
2021-01-03 06:44:08 s 1 +128684.68 3 +284399.58 7290.0 – C57
2021-01-03 06:54:08 S 06 49 42.554 -54 45 35.64 – V C57
2021-01-03 06:54:08 s 1 +128436.07 7 +284909.55 1590.0 – C57
2021-01-03 07:04:08 S 06 49 41.993 -54 45 59.72 – V C57
2021-01-03 07:04:08 s 1 +128186.87 0 +285418.20 5070.0 – C57
2021-01-03 07:14:08 S 06 49 41.273 -54 46 23.09 – V C57
2021-01-03 07:14:08 s 1 +127937.06 6 +285925.50 7740.0 – C57
2021-01-03 07:24:08 S 06 49 40.673 -54 46 47.32 – V C57
2021-01-03 07:24:08 s 1 +127686.66 7 +286431.48 9600.0 – C57
2021-01-03 07:34:08 S 06 49 40.186 -54 47 10.90 – V C57
2021-01-03 07:34:08 s 1 +127435.67 7 +286936.13 650.0 – C57
2021-01-03 07:44:08 S 06 49 39.674 -54 47 34.33 – V C57
2021-01-03 07:44:08 s 1 +127184.09 9 +287439.45 900.0 – C57
2021-01-03 07:54:08 S 06 49 38.962 -54 47 57.80 – V C57
2021-01-03 07:54:08 s 1 +126931.93 6 +287941.44 350.0 – C57
2021-01-03 08:04:08 S 06 49 38.273 -54 48 22.18 – V C57
2021-01-03 08:04:08 s 1 +126679.19 0 +288442.11 9010.0 – C57
2021-01-03 08:14:08 S 06 49 37.714 -54 48 45.07 – V C57
2021-01-03 08:14:08 s 1 +126425.86 7 +288941.47 6890.0 – C57
2021-01-03 08:24:08 S 06 49 37.140 -54 49 10.09 – V C57
2021-01-03 08:24:08 s 1 +126171.96 7 +289439.50 3970.0 – C57
2021-01-03 08:34:08 S 06 49 36.607 -54 49 33.17 – V C57
2021-01-03 08:34:08 s 1 +125917.49 6 +289936.22 280.0 – C57
2021-01-03 08:44:08 S 06 49 35.842 -54 49 57.04 – V C57
2021-01-03 08:44:08 s 1 +125662.45 5 +290431.63 5820.0 – C57
2021-01-03 08:54:08 S 06 49 35.292 -54 50 20.62 – V C57
2021-01-03 08:54:08 s 1 +125406.84 7 +290925.72 580.0 – C57
2021-01-03 09:04:08 S 06 49 34.706 -54 50 44.02 – V C57
2021-01-03 09:04:08 s 1 +125150.67 6 +291418.51 4580.0 – C57
2021-01-03 09:14:08 S 06 49 34.174 -54 51 08.03 – V C57
2021-01-03 09:14:08 s 1 +124893.94 5 +291909.98 7820.0 – C57
2021-01-03 09:24:08 S 06 49 33.386 -54 51 31.50 – V C57
2021-01-03 09:24:08 s 1 +124636.65 7 +292400.15 290.0 – C57
2021-01-03 09:34:08 S 06 49 32.698 -54 51 55.84 – V C57
2021-01-03 09:34:08 s 1 +124378.81 4 +292889.02 2010.0 – C57
2021-01-03 09:44:08 S 06 49 32.232 -54 52 19.70 – V C57
2021-01-03 09:44:08 s 1 +124120.42 0 +293376.59 2990.0 – C57
2021-01-03 09:54:08 S 06 49 31.627 -54 52 42.89 – V C57
2021-01-03 09:54:08 s 1 +123861.47 8 +293862.86 3210.0 – C57
2021-01-03 10:04:08 S 06 49 31.106 -54 53 06.58 – V C57
2021-01-03 10:04:08 s 1 +123601.99 0 +294347.83 2700.0 – C57
2021-01-03 10:14:08 S 06 49 30.343 -54 53 29.90 – V C57
2021-01-03 10:14:08 s 1 +123341.95 9 +294831.51 1450.0 – C57
2021-01-03 10:24:08 S 06 49 29.938 -54 53 52.94 – V C57
2021-01-03 10:24:08 s 1 +123081.38 9 +295313.89 9460.0 – C57
2021-01-03 10:34:08 S 06 49 29.213 -54 54 17.93 – V C57
2021-01-03 10:34:08 s 1 +122820.28 3 +295794.98 6750.0 – 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)