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
2021-01-30 13:44:07 s 1 +103900.76 6 +305288.98 6010.0 C57
2021-01-30 13:54:07 S 05 34 43.766 -75 13 50.45 V C57
2021-01-30 13:54:07 s 1 +103604.94 9 +305724.98 3050.0 C57
2021-01-30 14:04:07 S 05 34 41.174 -75 14 07.66 V C57
2021-01-30 14:04:07 s 1 +103308.69 2 +306159.67 9260.0 C57
2021-01-30 14:34:07 S 05 34 33.415 -75 14 59.03 V C57
2021-01-30 14:34:07 s 1 +102417.29 9 +307455.93 2860.0 C57
2021-01-30 14:44:07 S 05 34 30.530 -75 15 16.78 V C57
2021-01-30 14:44:07 s 1 +102119.30 3 +307885.43 5740.0 C57
2021-01-30 14:54:07 S 05 34 28.152 -75 15 35.32 V C57
2021-01-30 14:54:07 s 1 +101820.87 8 +308313.62 7800.0 C57
2021-01-30 15:04:07 S 05 34 25.344 -75 15 51.62 V C57
2021-01-30 15:04:07 s 1 +101522.02 8 +308740.53 9040.0 C57
2021-01-30 15:14:07 S 05 34 22.891 -75 16 07.82 V C57
2021-01-30 15:14:07 s 1 +101222.75 4 +309166.14 9480.0 C57
2021-01-30 15:24:07 S 05 34 20.222 -75 16 24.74 V C57
2021-01-30 15:24:07 s 1 +100923.05 9 +309590.46 9100.0 C57
2021-01-30 15:34:07 S 05 34 17.434 -75 16 43.50 V C57
2021-01-30 15:34:07 s 1 +100622.94 5 +310013.50 7930.0 C57
2021-01-30 15:44:07 S 05 34 15.012 -75 17 00.92 V C57
2021-01-30 15:44:07 s 1 +100322.41 6 +310435.25 5960.0 C57
2021-01-30 15:54:07 S 05 34 12.302 -75 17 16.94 V C57
2021-01-30 15:54:07 s 1 +100021.47 2 +310855.72 3190.0 C57
2021-01-30 16:04:07 S 05 34 09.646 -75 17 34.37 V C57
2021-01-30 16:04:07 s 1 +99720.117 0 +311274.90 9640.0 C57
2021-01-30 16:14:07 S 05 34 07.044 -75 17 51.90 V C57
2021-01-30 16:14:07 s 1 +99418.353 0 +311692.81 5300.0 C57
2021-01-30 16:24:07 S 05 34 04.255 -75 18 10.19 V C57
2021-01-30 16:24:07 s 1 +99116.182 0 +312109.44 180.0 C57
2021-01-30 16:34:07 S 05 34 01.740 -75 18 26.57 V C57
2021-01-30 16:34:07 s 1 +98813.607 0 +312524.79 4290.0 C57
2021-01-30 16:44:07 S 05 33 59.088 -75 18 43.02 V C57
2021-01-30 16:44:07 s 1 +98510.630 0 +312938.86 7620.0 C57
2021-01-30 16:54:07 S 05 33 56.561 -75 19 00.44 V C57
2021-01-30 16:54:07 s 1 +98207.254 0 +313351.67 180.0 C57
2021-01-30 17:04:07 S 05 33 53.966 -75 19 18.01 V C57
2021-01-30 17:04:07 s 1 +97903.480 0 +313763.20 1980.0 C57
2021-01-30 17:14:07 S 05 33 51.509 -75 19 34.86 V C57
2021-01-30 17:14:07 s 1 +97599.312 0 +314173.46 3030.0 C57
2021-01-30 17:24:07 S 05 33 48.509 -75 19 52.75 V C57
2021-01-30 17:24:07 s 1 +97294.750 0 +314582.46 3310.0 C57
2021-01-30 17:34:07 S 05 33 45.799 -75 20 09.10 V C57
2021-01-30 17:34:07 s 1 +96989.798 0 +314990.19 2850.0 C57
2021-01-30 17:44:07 S 05 33 43.106 -75 20 26.30 V C57
2021-01-30 17:44:07 s 1 +96684.458 0 +315396.66 1640.0 C57
2021-01-30 17:54:07 S 05 33 40.555 -75 20 43.91 V C57
2021-01-30 17:54:07 s 1 +96378.733 0 +315801.86 9690.0 C57
2021-01-30 18:04:07 S 05 33 37.850 -75 21 01.51 V C57
2021-01-30 18:04:07 s 1 +96072.623 0 +316205.80 6990.0 C57
2021-01-30 18:14:07 S 05 33 35.237 -75 21 16.67 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)