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
2021-06-28 09:54:00 S 19 27 55.879 +37 34 19.34 V C57
2021-06-28 09:54:00 s 1 +135101.38 5 +303459.24 5730.0 C57
2021-06-28 10:04:00 S 19 27 55.320 +37 34 19.31 V C57
2021-06-28 10:04:00 s 1 +134832.92 9 +303911.22 9670.0 C57
2021-06-28 10:14:00 S 19 27 54.456 +37 34 17.18 V C57
2021-06-28 10:14:00 s 1 +134563.94 2 +304362.04 2270.0 C57
2021-06-28 10:24:00 S 19 27 53.842 +37 34 19.45 V C57
2021-06-28 10:24:00 s 1 +134294.42 9 +304811.70 3540.0 C57
2021-06-28 11:14:00 S 19 27 49.906 +37 34 15.89 V C57
2021-06-28 11:14:00 s 1 +132939.03 2 +307042.58 200.0 C57
2021-06-28 11:24:00 S 19 27 49.130 +37 34 15.46 V C57
2021-06-28 11:24:00 s 1 +132666.40 4 +307485.29 3640.0 C57
2021-06-28 11:34:00 S 19 27 48.127 +37 34 12.94 V C57
2021-06-28 11:34:00 s 1 +132393.26 4 +307926.84 5800.0 C57
2021-06-28 11:44:00 S 19 27 47.539 +37 34 15.67 V C57
2021-06-28 11:44:00 s 1 +132119.61 6 +308367.24 6680.0 C57
2021-06-28 11:54:00 S 19 27 46.519 +37 34 14.45 V C57
2021-06-28 11:54:00 s 1 +131845.46 2 +308806.49 6290.0 C57
2021-06-28 12:14:00 S 19 27 44.926 +37 34 13.73 V C57
2021-06-28 12:14:00 s 1 +131295.64 3 +309681.54 1730.0 C57
2021-06-28 12:24:00 S 19 27 44.086 +37 34 14.48 V C57
2021-06-28 12:24:00 s 1 +131019.98 3 +310117.34 7560.0 C57
2021-06-28 12:44:00 S 19 27 42.799 +37 34 10.24 V C57
2021-06-28 12:44:00 s 1 +130467.17 3 +310985.52 5510.0 C57
2021-06-28 12:54:00 S 19 27 41.587 +37 34 13.30 V C57
2021-06-28 12:54:00 s 1 +130190.08 7 +311417.85 7770.0 C57
2021-06-28 13:04:00 S 19 27 41.179 +37 34 13.08 V C57
2021-06-28 13:04:00 s 1 +129915.18 8 +311847.39 4740.0 C57
2021-06-28 17:54:00 S 19 27 18.130 +37 34 03.97 V C57
2021-06-28 17:54:00 s 1 +121659.87 8 +323862.06 4060.0 C57
2021-06-28 18:04:00 S 19 27 17.311 +37 34 03.50 V C57
2021-06-28 18:04:00 s 1 +121368.51 1 +324259.60 890.0 C57
2021-06-28 18:14:00 S 19 27 16.567 +37 34 03.50 V C57
2021-06-28 18:14:00 s 1 +121076.71 8 +324656.04 6680.0 C57
2021-06-28 18:24:00 S 19 27 15.509 +37 34 03.94 V C57
2021-06-28 18:24:00 s 1 +120784.50 0 +325051.37 1430.0 C57
2021-06-28 18:54:00 S 19 27 13.562 +37 33 59.83 V C57
2021-06-28 18:54:00 s 1 +119905.31 8 +326230.77 9440.0 C57
2021-06-28 19:24:00 S 19 27 11.422 +37 33 55.55 V C57
2021-06-28 19:24:00 s 1 +119022.38 5 +327400.27 8250.0 C57
2021-06-28 22:14:00 S 19 26 57.290 +37 33 55.33 V C57
2021-06-28 22:14:00 s 1 +113950.63 7 +333842.08 4190.0 C57
2021-06-28 22:34:00 S 19 26 56.069 +37 33 54.18 V C57
2021-06-28 22:34:00 s 1 +113346.56 2 +334579.37 5700.0 C57
2021-06-29 00:44:00 S 19 26 45.756 +37 33 47.81 V C57
2021-06-29 00:44:00 s 1 +109383.91 7 +339267.28 8190.0 C57
2021-06-29 02:44:00 S 19 26 36.439 +37 33 41.72 V C57
2021-06-29 02:44:00 s 1 +105672.72 4 +343435.22 8420.0 C57
2021-06-29 02:54:00 S 19 26 36.223 +37 33 40.72 V C57
2021-06-29 02:54:00 s 1 +105361.23 7 +343775.70 6480.0 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)