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 08:34:07 s 1 +145798.15 0 +206755.63 3690.0 C57
2021-01-29 08:44:07 S 05 41 51.149 -74 21 57.24 V C57
2021-01-29 08:44:07 s 1 +145637.67 8 +207458.74 3600.0 C57
2021-01-29 08:54:07 S 05 41 48.794 -74 22 16.00 V C57
2021-01-29 08:54:07 s 1 +145475.94 0 +208160.05 1170.0 C57
2021-01-29 09:04:07 S 05 41 46.682 -74 22 34.68 V C57
2021-01-29 09:04:07 s 1 +145312.94 7 +208859.56 6410.0 C57
2021-01-29 09:14:07 S 05 41 44.378 -74 22 52.54 V C57
2021-01-29 09:14:07 s 1 +145148.70 5 +209557.27 9350.0 C57
2021-01-29 09:24:07 S 05 41 42.067 -74 23 10.39 V C57
2021-01-29 09:24:07 s 1 +144983.22 4 +210253.18 0.0 C57
2021-01-29 09:34:07 S 05 41 39.696 -74 23 28.90 V C57
2021-01-29 09:34:07 s 1 +144816.51 2 +210947.31 8370.0 C57
2021-01-29 09:44:07 S 05 41 37.279 -74 23 46.75 V C57
2021-01-29 09:44:07 s 1 +144648.57 7 +211639.65 4480.0 C57
2021-01-29 09:54:07 S 05 41 35.318 -74 24 05.18 V C57
2021-01-29 09:54:07 s 1 +144479.42 7 +212330.21 8340.0 C57
2021-01-29 10:04:07 S 05 41 32.863 -74 24 23.47 V C57
2021-01-29 10:04:07 s 1 +144309.06 9 +213018.99 9970.0 C57
2021-01-29 10:14:07 S 05 41 30.444 -74 24 42.19 V C57
2021-01-29 10:14:07 s 1 +144137.51 3 +213705.99 9380.0 C57
2021-01-29 10:24:07 S 05 41 28.104 -74 25 00.73 V C57
2021-01-29 10:24:07 s 1 +143964.76 5 +214391.22 6590.0 C57
2021-01-29 10:34:07 S 05 41 26.155 -74 25 17.94 V C57
2021-01-29 10:34:07 s 1 +143790.83 4 +215074.69 1610.0 C57
2021-01-29 10:44:07 S 05 41 23.995 -74 25 37.42 V C57
2021-01-29 10:44:07 s 1 +143615.72 7 +215756.40 4450.0 C57
2021-01-29 10:54:07 S 05 41 21.377 -74 25 55.99 V C57
2021-01-29 10:54:07 s 1 +143439.45 3 +216436.34 5130.0 C57
2021-01-29 11:04:07 S 05 41 19.027 -74 26 13.45 V C57
2021-01-29 11:04:07 s 1 +143262.01 8 +217114.53 3670.0 C57
2021-01-29 11:14:07 S 05 41 16.932 -74 26 32.86 V C57
2021-01-29 11:14:07 s 1 +143083.43 0 +217790.97 60.0 C57
2021-01-29 11:24:07 S 05 41 14.714 -74 26 49.85 V C57
2021-01-29 11:24:07 s 1 +142903.69 7 +218465.66 4340.0 C57
2021-01-29 11:34:07 S 05 41 12.254 -74 27 08.42 V C57
2021-01-29 11:34:07 s 1 +142722.82 6 +219138.61 6520.0 C57
2021-01-29 11:44:07 S 05 41 09.701 -74 27 26.50 V C57
2021-01-29 11:44:07 s 1 +142540.82 4 +219809.82 6600.0 C57
2021-01-29 11:54:07 S 05 41 07.759 -74 27 44.03 V C57
2021-01-29 11:54:07 s 1 +142357.70 0 +220479.29 4590.0 C57
2021-01-29 12:04:07 S 05 41 05.561 -74 28 02.50 V C57
2021-01-29 12:04:07 s 1 +142173.45 9 +221147.03 530.0 C57
2021-01-29 12:14:07 S 05 41 03.178 -74 28 20.89 V C57
2021-01-29 12:14:07 s 1 +141988.11 0 +221813.04 4400.0 C57
2021-01-29 12:24:07 S 05 41 00.775 -74 28 38.14 V C57
2021-01-29 12:24:07 s 1 +141801.65 9 +222477.33 6240.0 C57
2021-01-29 12:34:07 S 05 40 58.718 -74 28 58.01 V C57
2021-01-29 12:34:07 s 1 +141614.11 3 +223139.89 6050.0 C57
2021-01-29 12:44:07 S 05 40 56.261 -74 29 15.54 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)