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
2020-12-18 08:04:08 s 1 +142985.87 7 +41276.318 1030.0 C57
2020-12-18 08:14:08 S 07 03 31.435 -39 06 22.03 V C57
2020-12-18 08:14:08 s 1 +143394.75 7 +42348.034 490.0 C57
2020-12-18 08:24:08 S 07 03 31.291 -39 06 48.67 V C57
2020-12-18 08:24:08 s 1 +143797.60 7 +43417.965 2420.0 C57
2020-12-18 08:34:08 S 07 03 31.464 -39 07 15.53 V C57
2020-12-18 08:34:08 s 1 +144194.49 1 +44486.091 6940.0 C57
2020-12-18 08:44:08 S 07 03 31.260 -39 07 44.08 V C57
2020-12-18 08:44:08 s 1 +144585.47 5 +45552.393 4110.0 C57
2020-12-18 08:54:08 S 07 03 31.308 -39 08 12.23 V C57
2020-12-18 08:54:08 s 1 +144970.62 2 +46616.852 4020.0 C57
2020-12-18 09:04:08 S 07 03 31.282 -39 08 38.18 V C57
2020-12-18 09:04:08 s 1 +145349.99 6 +47679.451 6750.0 C57
2020-12-18 09:14:08 S 07 03 31.274 -39 09 06.41 V C57
2020-12-18 09:14:08 s 1 +145723.65 9 +48740.173 2390.0 C57
2020-12-18 09:24:08 S 07 03 31.250 -39 09 33.55 V C57
2020-12-18 09:24:08 s 1 +146091.67 1 +49799.001 1000.0 C57
2020-12-18 09:34:08 S 07 03 31.162 -39 10 00.37 V C57
2020-12-18 09:34:08 s 1 +146454.09 4 +50855.921 2680.0 C57
2020-12-18 09:44:08 S 07 03 31.087 -39 10 27.84 V C57
2020-12-18 09:44:08 s 1 +146810.98 6 +51910.917 7500.0 C57
2020-12-18 09:54:08 S 07 03 31.063 -39 10 56.28 V C57
2020-12-18 09:54:08 s 1 +147162.40 7 +52963.975 5540.0 C57
2020-12-18 10:04:08 S 07 03 31.051 -39 11 23.78 V C57
2020-12-18 10:04:08 s 1 +147508.41 5 +54015.081 6860.0 C57
2020-12-18 10:14:08 S 07 03 30.931 -39 11 50.96 V C57
2020-12-18 10:14:08 s 1 +147849.06 7 +55064.224 1550.0 C57
2020-12-18 10:24:08 S 07 03 30.869 -39 12 17.82 V C57
2020-12-18 10:24:08 s 1 +148184.41 8 +56111.389 9680.0 C57
2020-12-18 10:34:08 S 07 03 30.929 -39 12 45.47 V C57
2020-12-18 10:34:08 s 1 +148514.52 6 +57156.566 1310.0 C57
2020-12-18 10:44:08 S 07 03 30.842 -39 13 12.54 V C57
2020-12-18 10:44:08 s 1 +148839.44 4 +58199.743 6530.0 C57
2020-12-18 10:54:08 S 07 03 30.912 -39 13 39.29 V C57
2020-12-18 10:54:08 s 1 +149159.22 7 +59240.909 5390.0 C57
2020-12-18 11:04:08 S 07 03 30.706 -39 14 07.08 V C57
2020-12-18 11:04:08 s 1 +149473.92 9 +60280.054 7980.0 C57
2020-12-18 11:14:08 S 07 03 30.694 -39 14 34.69 V C57
2020-12-18 11:14:08 s 1 +149783.60 2 +61317.169 4350.0 C57
2020-12-18 11:24:08 S 07 03 30.677 -39 15 02.09 V C57
2020-12-18 11:24:08 s 1 +150088.29 8 +62352.244 4580.0 C57
2020-12-18 11:34:08 S 07 03 30.600 -39 15 30.24 V C57
2020-12-18 11:34:08 s 1 +150388.06 8 +63385.270 8730.0 C57
2020-12-18 11:44:08 S 07 03 30.434 -39 15 57.53 V C57
2020-12-18 11:44:08 s 1 +150682.96 3 +64416.239 6860.0 C57
2020-12-18 11:54:08 S 07 03 30.466 -39 16 25.07 V C57
2020-12-18 11:54:08 s 1 +150973.03 3 +65445.143 9040.0 C57
2020-12-18 12:04:08 S 07 03 30.295 -39 16 52.10 V C57
2020-12-18 12:04:08 s 1 +151258.32 7 +66471.975 5340.0 C57
2020-12-18 12:14:08 S 07 03 30.300 -39 17 19.61 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)