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
2021-06-29 03:04:00 S 19 26 34.930 +37 33 42.05 V C57
2021-06-29 03:04:00 s 1 +105049.41 5 +344115.13 3730.0 C57
2021-06-29 03:24:00 S 19 26 33.636 +37 33 37.08 V C57
2021-06-29 03:24:00 s 1 +104424.77 6 +344790.84 5870.0 C57
2021-06-29 03:44:00 S 19 26 31.879 +37 33 37.15 V C57
2021-06-29 03:44:00 s 1 +103798.81 8 +345462.37 4890.0 C57
2021-06-29 03:54:00 S 19 26 30.989 +37 33 39.85 V C57
2021-06-29 03:54:00 s 1 +103485.34 9 +345796.57 8230.0 C57
2021-06-29 04:04:00 S 19 26 30.278 +37 33 36.43 V C57
2021-06-29 04:04:00 s 1 +103171.55 5 +346129.72 800.0 C57
2021-06-29 04:14:00 S 19 26 29.602 +37 33 38.45 V C57
2021-06-29 04:14:00 s 1 +102857.43 7 +346461.83 2610.0 C57
2021-06-29 04:44:00 S 19 26 27.314 +37 33 32.87 V C57
2021-06-29 04:44:00 s 1 +101913.15 8 +347451.91 3490.0 C57
2021-06-29 05:04:00 S 19 26 25.692 +37 33 37.55 V C57
2021-06-29 05:04:00 s 1 +101282.04 9 +348106.76 320.0 C57
2021-06-29 05:14:00 S 19 26 24.749 +37 33 36.79 V C57
2021-06-29 05:14:00 s 1 +100966.02 2 +348432.63 7620.0 C57
2021-06-29 05:44:00 S 19 26 22.848 +37 33 31.36 V C57
2021-06-29 05:44:00 s 1 +100016.07 1 +349404.03 5130.0 C57
2021-06-29 05:54:00 S 19 26 21.818 +37 33 34.38 V C57
2021-06-29 05:54:00 s 1 +99698.801 0 +349725.76 9520.0 C57
2021-06-29 06:04:00 S 19 26 21.278 +37 33 31.86 V C57
2021-06-29 06:04:00 s 1 +99381.225 0 +350046.46 3180.0 C57
2021-06-29 06:14:00 S 19 26 20.395 +37 33 29.84 V C57
2021-06-29 06:14:00 s 1 +99063.343 0 +350366.13 6130.0 C57
2021-06-29 06:24:00 S 19 26 19.390 +37 33 33.77 V C57
2021-06-29 06:24:00 s 1 +98745.157 0 +350684.76 8360.0 C57
2021-06-29 06:34:00 S 19 26 18.929 +37 33 28.40 V C57
2021-06-29 06:34:00 s 1 +98426.668 0 +351002.36 9890.0 C57
2021-06-29 06:44:00 S 19 26 17.988 +37 33 31.97 V C57
2021-06-29 06:44:00 s 1 +98107.878 0 +351318.94 720.0 C57
2021-06-29 06:54:00 S 19 26 17.172 +37 33 32.51 V C57
2021-06-29 06:54:00 s 1 +97788.789 0 +351634.49 840.0 C57
2021-06-29 07:04:00 S 19 26 16.601 +37 33 29.02 V C57
2021-06-29 07:04:00 s 1 +97469.401 0 +351949.00 270.0 C57
2021-06-29 07:54:00 S 19 26 12.492 +37 33 27.43 V C57
2021-06-29 07:54:00 s 1 +95868.038 0 +353506.21 7120.0 C57
2021-06-29 08:24:00 S 19 26 10.234 +37 33 24.05 V C57
2021-06-29 08:24:00 s 1 +94903.732 0 +354428.26 1130.0 C57
2021-06-29 08:54:00 S 19 26 08.165 +37 33 23.69 V C57
2021-06-29 08:54:00 s 1 +93936.857 0 +355341.13 9200.0 C57
2021-06-29 09:14:00 S 19 26 06.312 +37 33 23.04 V C57
2021-06-29 09:14:00 s 1 +93290.864 0 +355944.61 1330.0 C57
2021-06-29 09:24:00 S 19 26 05.724 +37 33 21.46 V C57
2021-06-29 09:24:00 s 1 +92967.449 0 +356244.83 1430.0 C57
2021-06-29 09:34:00 S 19 26 04.850 +37 33 19.62 V C57
2021-06-29 09:34:00 s 1 +92643.757 0 +356544.04 890.0 C57
2021-06-29 09:44:00 S 19 26 04.015 +37 33 24.26 V C57
2021-06-29 09:44:00 s 1 +92319.789 0 +356842.23 9720.0 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)