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 21:14:08 S 06 08 33.442 -69 29 43.69 V C57
2021-01-21 21:14:08 s 1 -119852.72 4 +364198.15 4960.0 C57
2021-01-21 21:24:08 S 06 08 32.290 -69 29 58.42 V C57
2021-01-21 21:24:08 s 1 -120150.50 3 +363967.43 1420.0 C57
2021-01-21 21:34:08 S 06 08 30.619 -69 30 17.42 V C57
2021-01-21 21:34:08 s 1 -120447.98 4 +363735.78 7380.0 C57
2021-01-21 21:44:08 S 06 08 28.750 -69 30 32.98 V C57
2021-01-21 21:44:08 s 1 -120745.16 4 +363503.21 2830.0 C57
2021-01-21 21:54:08 S 06 08 27.127 -69 30 49.68 V C57
2021-01-21 21:54:08 s 1 -121042.04 3 +363269.71 7780.0 C57
2021-01-21 22:04:07 S 06 08 25.668 -69 31 06.82 V C57
2021-01-21 22:04:07 s 1 -121338.61 9 +363035.29 2210.0 C57
2021-01-21 22:14:08 S 06 08 24.329 -69 31 23.63 V C57
2021-01-21 22:14:08 s 1 -121634.89 2 +362799.94 6140.0 C57
2021-01-21 22:24:08 S 06 08 22.670 -69 31 39.83 V C57
2021-01-21 22:24:08 s 1 -121930.86 0 +362563.66 9540.0 C57
2021-01-21 22:34:08 S 06 08 21.444 -69 31 57.83 V C57
2021-01-21 22:34:08 s 1 -122226.52 2 +362326.45 2440.0 C57
2021-01-21 22:44:08 S 06 08 19.819 -69 32 14.89 V C57
2021-01-21 22:44:08 s 1 -122521.87 8 +362088.32 4820.0 C57
2021-01-21 22:54:08 S 06 08 18.266 -69 32 30.88 V C57
2021-01-21 22:54:08 s 1 -122816.92 6 +361849.26 6670.0 C57
2021-01-21 23:04:08 S 06 08 16.718 -69 32 48.98 V C57
2021-01-21 23:04:08 s 1 -123111.66 5 +361609.27 8010.0 C57
2021-01-21 23:14:08 S 06 08 15.098 -69 33 04.90 V C57
2021-01-21 23:14:08 s 1 -123406.09 3 +361368.35 8820.0 C57
2021-01-21 23:24:08 S 06 08 13.594 -69 33 20.81 V C57
2021-01-21 23:24:08 s 1 -123700.21 1 +361126.51 9110.0 C57
2021-01-21 23:34:07 S 06 08 12.178 -69 33 37.51 V C57
2021-01-21 23:34:07 s 1 -123994.01 6 +360883.73 8870.0 C57
2021-01-21 23:44:08 S 06 08 10.831 -69 33 53.53 V C57
2021-01-21 23:44:08 s 1 -124287.50 8 +360640.03 8110.0 C57
2021-01-21 23:54:08 S 06 08 09.290 -69 34 11.53 V C57
2021-01-21 23:54:08 s 1 -124580.68 5 +360395.39 6810.0 C57
2021-01-22 00:04:08 S 06 08 07.469 -69 34 28.31 V C57
2021-01-22 00:04:08 s 1 -124873.54 7 +360149.83 4980.0 C57
2021-01-22 00:14:08 S 06 08 05.933 -69 34 44.22 V C57
2021-01-22 00:14:08 s 1 -125166.09 2 +359903.33 2610.0 C57
2021-01-22 00:24:08 S 06 08 04.387 -69 35 00.78 V C57
2021-01-22 00:24:08 s 1 -125458.32 0 +359655.90 9710.0 C57
2021-01-22 00:34:08 S 06 08 02.916 -69 35 18.28 V C57
2021-01-22 00:34:08 s 1 -125750.22 8 +359407.55 6270.0 C57
2021-01-22 00:44:08 S 06 08 01.546 -69 35 34.84 V C57
2021-01-22 00:44:08 s 1 -126041.81 6 +359158.26 2290.0 C57
2021-01-22 00:54:08 S 06 08 00.211 -69 35 51.40 V C57
2021-01-22 00:54:08 s 1 -126333.08 3 +358908.04 7770.0 C57
2021-01-22 01:04:07 S 06 07 58.411 -69 36 07.67 V C57
2021-01-22 01:04:07 s 1 -126624.02 8 +358656.88 2700.0 C57
2021-01-22 01:14:08 S 06 07 56.870 -69 36 25.67 V C57
2021-01-22 01:14:08 s 1 -126914.64 9 +358404.80 7090.0 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)