IAA RAS IAA Minor Planet Database

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
2021-01-15 17:24:08 s 1 +147969.75 3 +177693.04 940.0 – C57
2021-01-15 17:34:08 S 06 27 32.203 -64 52 36.08 – V C57
2021-01-15 17:34:08 s 1 +147874.46 9 +178477.17 5460.0 – C57
2021-01-15 17:44:08 S 06 27 31.046 -64 52 57.22 – V C57
2021-01-15 17:44:08 s 1 +147777.50 1 +179259.29 7090.0 – C57
2021-01-15 17:54:08 S 06 27 30.098 -64 53 16.98 – V C57
2021-01-15 17:54:08 s 1 +147678.86 3 +180039.38 5850.0 – C57
2021-01-15 18:04:08 S 06 27 29.350 -64 53 39.16 – V C57
2021-01-15 18:04:08 s 1 +147578.56 6 +180817.46 1770.0 – C57
2021-01-15 18:14:08 S 06 27 28.231 -64 54 00.29 – V C57
2021-01-15 18:14:08 s 1 +147476.62 4 +181593.53 4860.0 – C57
2021-01-15 18:24:08 S 06 27 27.173 -64 54 20.84 – V C57
2021-01-15 18:24:08 s 1 +147373.04 8 +182367.59 5150.0 – C57
2021-01-15 18:34:08 S 06 27 26.102 -64 54 39.78 – V C57
2021-01-15 18:34:08 s 1 +147267.85 0 +183139.66 2650.0 – C57
2021-01-15 18:44:08 S 06 27 25.250 -64 55 03.07 – V C57
2021-01-15 18:44:08 s 1 +147161.04 2 +183909.73 7390.0 – C57
2021-01-15 18:54:08 S 06 27 24.329 -64 55 23.56 – V C57
2021-01-15 18:54:08 s 1 +147052.63 6 +184677.81 9390.0 – C57
2021-01-15 19:04:08 S 06 27 23.342 -64 55 44.47 – V C57
2021-01-15 19:04:08 s 1 +146942.64 4 +185443.91 8660.0 – C57
2021-01-15 19:14:08 S 06 27 22.217 -64 56 04.85 – V C57
2021-01-15 19:14:08 s 1 +146831.07 7 +186208.03 5230.0 – C57
2021-01-15 19:24:08 S 06 27 21.547 -64 56 26.09 – V C57
2021-01-15 19:24:08 s 1 +146717.94 8 +186970.18 9110.0 – C57
2021-01-15 19:34:08 S 06 27 20.462 -64 56 48.05 – V C57
2021-01-15 19:34:08 s 1 +146603.26 6 +187730.36 340.0 – C57
2021-01-15 19:44:08 S 06 27 19.294 -64 57 09.83 – V C57
2021-01-15 19:44:08 s 1 +146487.04 4 +188488.57 8910.0 – C57
2021-01-15 19:54:08 S 06 27 18.422 -64 57 27.47 – V C57
2021-01-15 19:54:08 s 1 +146369.29 2 +189244.82 4860.0 – C57
2021-01-15 20:04:08 S 06 27 17.938 -64 57 49.46 – V C57
2021-01-15 20:04:08 s 1 +146250.02 2 +189999.12 8200.0 – C57
2021-01-15 20:14:08 S 06 27 16.018 -64 58 08.47 – V C57
2021-01-15 20:14:08 s 1 +146129.24 5 +190751.47 8950.0 – C57
2021-01-15 20:24:08 S 06 27 15.286 -64 58 31.94 – V C57
2021-01-15 20:24:08 s 1 +146006.97 1 +191501.87 7140.0 – C57
2021-01-15 20:34:08 S 06 27 14.338 -64 58 52.68 – V C57
2021-01-15 20:34:08 s 1 +145883.21 1 +192250.34 2770.0 – C57
2021-01-15 20:44:08 S 06 27 13.690 -64 59 13.74 – V C57
2021-01-15 20:44:08 s 1 +145757.97 6 +192996.87 5860.0 – C57
2021-01-15 20:54:08 S 06 27 12.614 -64 59 35.05 – V C57
2021-01-15 20:54:08 s 1 +145631.27 6 +193741.47 6440.0 – C57
2021-01-15 21:04:08 S 06 27 11.551 -64 59 54.46 – V C57
2021-01-15 21:04:08 s 1 +145503.12 2 +194484.14 4520.0 – C57
2021-01-15 21:14:08 S 06 27 10.644 -65 00 15.41 – V C57
2021-01-15 21:14:08 s 1 +145373.52 4 +195224.89 120.0 – C57
2021-01-15 21:24:08 S 06 27 09.648 -65 00 37.80 – V C57
2021-01-15 21:24:08 s 1 +145242.49 2 +195963.73 3250.0 – C57
2021-01-15 21:34:08 S 06 27 08.623 -65 00 58.32 – 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)