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
2021-01-29 21:04:07 s 1 +130747.34 3 +254729.97 8630.0 C57
2021-01-29 21:14:07 S 05 38 55.411 -74 44 34.12 V C57
2021-01-29 21:14:07 s 1 +130511.38 4 +255307.76 8430.0 C57
2021-01-29 21:24:07 S 05 38 53.249 -74 44 52.66 V C57
2021-01-29 21:24:07 s 1 +130274.63 7 +255883.99 6760.0 C57
2021-01-29 21:34:07 S 05 38 50.626 -74 45 10.44 V C57
2021-01-29 21:34:07 s 1 +130037.10 6 +256458.69 3630.0 C57
2021-01-29 21:44:07 S 05 38 48.298 -74 45 26.82 V C57
2021-01-29 21:44:07 s 1 +129798.79 6 +257031.84 9040.0 C57
2021-01-29 21:54:07 S 05 38 46.085 -74 45 46.37 V C57
2021-01-29 21:54:07 s 1 +129559.71 1 +257603.46 3000.0 C57
2021-01-29 22:04:07 S 05 38 43.690 -74 46 03.58 V C57
2021-01-29 22:04:07 s 1 +129319.85 7 +258173.55 5530.0 C57
2021-01-29 22:14:07 S 05 38 40.968 -74 46 21.50 V C57
2021-01-29 22:14:07 s 1 +129079.23 8 +258742.10 6630.0 C57
2021-01-29 22:24:07 S 05 38 38.611 -74 46 39.04 V C57
2021-01-29 22:24:07 s 1 +128837.85 8 +259309.13 6310.0 C57
2021-01-29 22:34:07 S 05 38 36.329 -74 46 57.83 V C57
2021-01-29 22:34:07 s 1 +128595.72 2 +259874.63 4570.0 C57
2021-01-29 22:44:07 S 05 38 33.682 -74 47 15.11 V C57
2021-01-29 22:44:07 s 1 +128352.83 4 +260438.60 1430.0 C57
2021-01-29 22:54:07 S 05 38 31.241 -74 47 32.96 V C57
2021-01-29 22:54:07 s 1 +128109.19 9 +261001.06 6890.0 C57
2021-01-29 23:04:07 S 05 38 28.591 -74 47 49.99 V C57
2021-01-29 23:04:07 s 1 +127864.82 1 +261562.00 960.0 C57
2021-01-29 23:14:07 S 05 38 26.335 -74 48 08.64 V C57
2021-01-29 23:14:07 s 1 +127619.70 5 +262121.43 3650.0 C57
2021-01-29 23:24:07 S 05 38 24.014 -74 48 26.10 V C57
2021-01-29 23:24:07 s 1 +127373.85 5 +262679.34 4970.0 C57
2021-01-29 23:34:07 S 05 38 21.442 -74 48 43.45 V C57
2021-01-29 23:34:07 s 1 +127127.27 5 +263235.75 4920.0 C57
2021-01-29 23:44:07 S 05 38 19.063 -74 49 01.60 V C57
2021-01-29 23:44:07 s 1 +126879.97 0 +263790.65 3520.0 C57
2021-01-29 23:54:07 S 05 38 16.646 -74 49 20.68 V C57
2021-01-29 23:54:07 s 1 +126631.94 4 +264344.05 760.0 C57
2021-01-30 00:04:07 S 05 38 14.114 -74 49 37.45 V C57
2021-01-30 00:04:07 s 1 +126383.20 1 +264895.95 6670.0 C57
2021-01-30 00:14:07 S 05 38 11.676 -74 49 55.60 V C57
2021-01-30 00:14:07 s 1 +126133.74 5 +265446.35 1240.0 C57
2021-01-30 00:24:07 S 05 38 09.211 -74 50 13.27 V C57
2021-01-30 00:24:07 s 1 +125883.58 0 +265995.25 4480.0 C57
2021-01-30 00:34:07 S 05 38 06.583 -74 50 30.91 V C57
2021-01-30 00:34:07 s 1 +125632.71 2 +266542.67 6400.0 C57
2021-01-30 00:44:07 S 05 38 04.452 -74 50 48.19 V C57
2021-01-30 00:44:07 s 1 +125381.14 3 +267088.60 7010.0 C57
2021-01-30 00:54:07 S 05 38 01.886 -74 51 05.58 V C57
2021-01-30 00:54:07 s 1 +125128.87 8 +267633.03 6320.0 C57
2021-01-30 01:04:07 S 05 37 59.354 -74 51 22.79 V C57
2021-01-30 01:04:07 s 1 +124875.92 1 +268175.99 4330.0 C57
2021-01-30 01:14:07 S 05 37 57.067 -74 51 40.57 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)