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
2021-07-05 22:14:00 S 19 14 40.682 +37 14 11.08 V C57
2021-07-05 22:14:00 s 1 -197824.19 4 +232691.93 3150.0 C57
2021-07-05 22:44:00 S 19 14 38.842 +37 14 04.42 V C57
2021-07-05 22:44:00 s 1 -198221.34 2 +230957.22 4610.0 C57
2021-07-05 23:54:00 S 19 14 33.538 +37 13 55.67 V C57
2021-07-05 23:54:00 s 1 -199114.53 9 +226870.88 6290.0 C57
2021-07-06 00:14:00 S 19 14 32.362 +37 13 49.94 V C57
2021-07-06 00:14:00 s 1 -199360.99 0 +225693.38 6490.0 C57
2021-07-06 00:24:00 S 19 14 31.260 +37 13 47.28 V C57
2021-07-06 00:24:00 s 1 -199482.73 8 +225102.97 6950.0 C57
2021-07-06 01:04:00 S 19 14 28.930 +37 13 42.31 V C57
2021-07-06 01:04:00 s 1 -199959.78 8 +222730.17 7680.0 C57
2021-07-06 01:54:00 S 19 14 25.205 +37 13 34.14 V C57
2021-07-06 01:54:00 s 1 -200533.42 7 +219739.05 100.0 C57
2021-07-06 02:04:00 S 19 14 24.295 +37 13 32.59 V C57
2021-07-06 02:04:00 s 1 -200645.09 0 +219137.47 9000.0 C57
2021-07-06 02:14:00 S 19 14 24.060 +37 13 27.48 V C57
2021-07-06 02:14:00 s 1 -200755.72 2 +218534.77 4670.0 C57
2021-07-06 02:24:00 S 19 14 23.165 +37 13 24.96 V C57
2021-07-06 02:24:00 s 1 -200865.31 9 +217930.95 7100.0 C57
2021-07-06 02:34:00 S 19 14 22.337 +37 13 23.45 V C57
2021-07-06 02:34:00 s 1 -200973.87 6 +217326.00 6280.0 C57
2021-07-06 02:44:00 S 19 14 21.763 +37 13 24.85 V C57
2021-07-06 02:44:00 s 1 -201081.38 9 +216719.93 2200.0 C57
2021-07-06 02:54:00 S 19 14 20.962 +37 13 23.56 V C57
2021-07-06 02:54:00 s 1 -201187.85 5 +216112.74 4850.0 C57
2021-07-06 03:04:00 S 19 14 20.333 +37 13 22.58 V C57
2021-07-06 03:04:00 s 1 -201293.26 7 +215504.42 4200.0 C57
2021-07-06 03:14:00 S 19 14 19.421 +37 13 20.93 V C57
2021-07-06 03:14:00 s 1 -201397.62 3 +214894.98 260.0 C57
2021-07-06 03:24:00 S 19 14 18.835 +37 13 16.07 V C57
2021-07-06 03:24:00 s 1 -201500.91 8 +214284.40 2990.0 C57
2021-07-06 03:44:00 S 19 14 17.227 +37 13 16.54 V C57
2021-07-06 03:44:00 s 1 -201704.30 6 +213059.87 8470.0 C57
2021-07-06 03:54:00 S 19 14 16.524 +37 13 13.30 V C57
2021-07-06 03:54:00 s 1 -201804.39 1 +212445.92 1190.0 C57
2021-07-06 04:04:00 S 19 14 15.787 +37 13 08.83 V C57
2021-07-06 04:04:00 s 1 -201903.39 7 +211830.83 530.0 C57
2021-07-06 04:14:00 S 19 14 15.108 +37 13 10.38 V C57
2021-07-06 04:14:00 s 1 -202001.32 0 +211214.61 6500.0 C57
2021-07-06 04:24:00 S 19 14 14.426 +37 13 07.61 V C57
2021-07-06 04:24:00 s 1 -202098.15 5 +210597.25 9070.0 C57
2021-07-06 04:34:00 S 19 14 13.858 +37 13 05.95 V C57
2021-07-06 04:34:00 s 1 -202193.89 8 +209978.77 8230.0 C57
2021-07-06 04:44:00 S 19 14 13.018 +37 13 05.20 V C57
2021-07-06 04:44:00 s 1 -202288.54 4 +209359.15 3970.0 C57
2021-07-06 04:54:00 S 19 14 12.605 +37 13 00.08 V C57
2021-07-06 04:54:00 s 1 -202382.08 8 +208738.39 6280.0 C57
2021-07-06 05:04:00 S 19 14 12.031 +37 12 58.00 V C57
2021-07-06 05:04:00 s 1 -202474.52 6 +208116.50 5130.0 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)