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
2021-06-25 17:14:00 S 19 33 30.634 +37 33 23.62 V C57
2021-06-25 17:14:00 s 1 +151232.36 4 +24022.455 870.0 C57
2021-06-25 17:34:00 S 19 33 28.690 +37 33 22.36 V C57
2021-06-25 17:34:00 s 1 +152116.92 1 +26035.930 320.0 C57
2021-06-25 17:54:01 S 19 33 26.539 +37 33 24.70 V C57
2021-06-25 17:54:01 s 1 +152980.20 0 +28045.761 9820.0 C57
2021-06-25 18:24:00 S 19 33 23.311 +37 33 30.92 V C57
2021-06-25 18:24:00 s 1 +154236.00 0 +31053.256 8920.0 C57
2021-06-25 18:44:00 S 19 33 21.595 +37 33 32.83 V C57
2021-06-25 18:44:00 s 1 +155047.63 2 +33053.156 3070.0 C57
2021-06-25 18:54:01 S 19 33 20.767 +37 33 28.58 V C57
2021-06-25 18:54:01 s 1 +155445.90 5 +34051.513 8940.0 C57
2021-06-25 19:04:00 S 19 33 19.630 +37 33 30.78 V C57
2021-06-25 19:04:00 s 1 +155839.20 7 +35048.780 840.0 C57
2021-06-25 19:14:01 S 19 33 18.826 +37 33 30.35 V C57
2021-06-25 19:14:01 s 1 +156227.57 9 +36044.939 8900.0 C57
2021-06-25 19:24:01 S 19 33 17.810 +37 33 33.59 V C57
2021-06-25 19:24:01 s 1 +156611.06 1 +37039.971 3220.0 C57
2021-06-25 19:34:00 S 19 33 16.930 +37 33 30.74 V C57
2021-06-25 19:34:00 s 1 +156989.69 6 +38033.856 3940.0 C57
2021-06-25 19:44:01 S 19 33 15.929 +37 33 31.75 V C57
2021-06-25 19:44:01 s 1 +157363.52 3 +39026.577 1170.0 C57
2021-06-25 19:54:00 S 19 33 14.921 +37 33 35.21 V C57
2021-06-25 19:54:00 s 1 +157732.58 2 +40018.116 5020.0 C57
2021-06-25 20:14:00 S 19 33 13.138 +37 33 34.60 V C57
2021-06-25 20:14:00 s 1 +158456.55 6 +41997.580 3070.0 C57
2021-06-25 20:24:01 S 19 33 12.178 +37 33 34.31 V C57
2021-06-25 20:24:01 s 1 +158811.54 9 +42985.474 7490.0 C57
2021-06-25 20:44:01 S 19 33 10.090 +37 33 38.70 V C57
2021-06-25 20:44:01 s 1 +159507.74 0 +44957.503 7700.0 C57
2021-06-25 20:54:01 S 19 33 09.101 +37 33 36.76 V C57
2021-06-25 20:54:01 s 1 +159849.01 3 +45941.609 3710.0 C57
2021-06-25 21:34:01 S 19 33 05.400 +37 33 40.57 V C57
2021-06-25 21:34:01 s 1 +161169.49 5 +49864.982 2910.0 C57
2021-06-25 21:44:00 S 19 33 04.433 +37 33 40.03 V C57
2021-06-25 21:44:00 s 1 +161488.64 4 +50842.495 7050.0 C57
2021-06-25 21:54:01 S 19 33 03.540 +37 33 42.84 V C57
2021-06-25 21:54:01 s 1 +161803.47 8 +51818.651 9120.0 C57
2021-06-25 22:04:00 S 19 33 02.494 +37 33 42.26 V C57
2021-06-25 22:04:00 s 1 +162114.03 0 +52793.438 9230.0 C57
2021-06-25 22:14:01 S 19 33 01.596 +37 33 41.72 V C57
2021-06-25 22:14:01 s 1 +162420.33 5 +53766.843 7480.0 C57
2021-06-25 22:24:01 S 19 33 00.823 +37 33 41.83 V C57
2021-06-25 22:24:01 s 1 +162722.42 8 +54738.856 3980.0 C57
2021-06-25 22:34:00 S 19 32 59.662 +37 33 46.76 V C57
2021-06-25 22:34:00 s 1 +163020.34 4 +55709.466 8810.0 C57
2021-06-25 22:54:00 S 19 32 57.936 +37 33 47.09 V C57
2021-06-25 22:54:00 s 1 +163603.77 7 +57646.433 3910.0 C57
2021-06-25 23:04:01 S 19 32 56.902 +37 33 49.10 V C57
2021-06-25 23:04:01 s 1 +163889.36 0 +58612.770 4350.0 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)