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
2021-01-21 08:24:08 S 06 10 29.306 -69 07 59.81 V C57
2021-01-21 08:24:08 s 1 -96106.281 0 +379205.11 5600.0 C57
2021-01-21 08:34:08 S 06 10 27.761 -69 08 15.97 V C57
2021-01-21 08:34:08 s 1 -96424.060 0 +379044.91 5560.0 C57
2021-01-21 08:44:08 S 06 10 26.359 -69 08 33.94 V C57
2021-01-21 08:44:08 s 1 -96741.617 0 +378883.80 5150.0 C57
2021-01-21 08:54:08 S 06 10 24.624 -69 08 50.86 V C57
2021-01-21 08:54:08 s 1 -97058.949 0 +378721.79 4370.0 C57
2021-01-21 09:04:08 S 06 10 23.098 -69 09 06.41 V C57
2021-01-21 09:04:08 s 1 -97376.055 0 +378558.86 3210.0 C57
2021-01-21 09:14:08 S 06 10 21.737 -69 09 24.91 V C57
2021-01-21 09:14:08 s 1 -97692.936 0 +378395.03 1670.0 C57
2021-01-21 09:24:08 S 06 10 20.465 -69 09 41.80 V C57
2021-01-21 09:24:08 s 1 -98009.590 0 +378230.28 9760.0 C57
2021-01-21 09:34:08 S 06 10 18.821 -69 09 58.61 V C57
2021-01-21 09:34:08 s 1 -98326.016 0 +378064.63 7470.0 C57
2021-01-21 09:44:08 S 06 10 17.354 -69 10 16.50 V C57
2021-01-21 09:44:08 s 1 -98642.213 0 +377898.07 4790.0 C57
2021-01-21 09:54:08 S 06 10 16.334 -69 10 33.10 V C57
2021-01-21 09:54:08 s 1 -98958.181 0 +377730.60 1740.0 C57
2021-01-21 10:04:08 S 06 10 14.563 -69 10 51.71 V C57
2021-01-21 10:04:08 s 1 -99273.918 0 +377562.21 8300.0 C57
2021-01-21 10:14:08 S 06 10 12.619 -69 11 06.18 V C57
2021-01-21 10:14:08 s 1 -99589.423 0 +377392.92 4470.0 C57
2021-01-21 10:24:08 S 06 10 11.460 -69 11 24.40 V C57
2021-01-21 10:24:08 s 1 -99904.696 0 +377222.72 260.0 C57
2021-01-21 10:34:08 S 06 10 10.001 -69 11 42.54 V C57
2021-01-21 10:34:08 s 1 -100219.73 5 +377051.61 5650.0 C57
2021-01-21 10:44:08 S 06 10 08.527 -69 11 58.81 V C57
2021-01-21 10:44:08 s 1 -100534.54 0 +376879.58 660.0 C57
2021-01-21 10:54:08 S 06 10 06.787 -69 12 15.08 V C57
2021-01-21 10:54:08 s 1 -100849.11 0 +376706.65 5280.0 C57
2021-01-21 11:04:08 S 06 10 05.165 -69 12 32.00 V C57
2021-01-21 11:04:08 s 1 -101163.44 3 +376532.81 9500.0 C57
2021-01-21 11:14:08 S 06 10 03.804 -69 12 48.78 V C57
2021-01-21 11:14:08 s 1 -101477.53 9 +376358.05 3320.0 C57
2021-01-21 11:24:08 S 06 10 02.479 -69 13 05.41 V C57
2021-01-21 11:24:08 s 1 -101791.39 7 +376182.38 6750.0 C57
2021-01-21 11:34:08 S 06 10 00.874 -69 13 23.52 V C57
2021-01-21 11:34:08 s 1 -102105.01 7 +376005.81 9780.0 C57
2021-01-21 11:44:08 S 06 09 59.405 -69 13 41.23 V C57
2021-01-21 11:44:08 s 1 -102418.39 6 +375828.32 2410.0 C57
2021-01-21 11:54:08 S 06 09 57.900 -69 13 58.33 V C57
2021-01-21 11:54:08 s 1 -102731.53 4 +375649.92 4630.0 C57
2021-01-21 12:04:08 S 06 09 56.381 -69 14 13.34 V C57
2021-01-21 12:04:08 s 1 -103044.43 0 +375470.60 6450.0 C57
2021-01-21 12:14:08 S 06 09 54.641 -69 14 30.80 V C57
2021-01-21 12:14:08 s 1 -103357.08 4 +375290.38 7870.0 C57
2021-01-21 12:24:08 S 06 09 53.304 -69 14 47.51 V C57
2021-01-21 12:24:08 s 1 -103669.49 3 +375109.24 8880.0 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)