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
2021-01-05 19:14:08 S 06 45 36.000 -57 04 03.43 – V C57
2021-01-05 19:14:08 s 1 +16010.648 0 +394416.32 8000.0 – C57
2021-01-05 19:24:08 S 06 45 35.162 -57 04 26.29 – V C57
2021-01-05 19:24:08 s 1 +15670.793 0 +394536.13 6140.0 – C57
2021-01-05 19:34:08 S 06 45 34.416 -57 04 47.96 – V C57
2021-01-05 19:34:08 s 1 +15330.907 0 +394655.04 4330.0 – C57
2021-01-05 19:44:08 S 06 45 33.809 -57 05 09.82 – V C57
2021-01-05 19:44:08 s 1 +14990.990 0 +394773.03 2550.0 – C57
2021-01-05 19:54:08 S 06 45 32.940 -57 05 32.32 – V C57
2021-01-05 19:54:08 s 1 +14651.043 0 +394890.11 800.0 – C57
2021-01-05 20:04:08 S 06 45 32.160 -57 05 54.82 – V C57
2021-01-05 20:04:08 s 1 +14311.067 0 +395006.27 9100.0 – C57
2021-01-05 20:14:08 S 06 45 31.519 -57 06 17.06 – V C57
2021-01-05 20:14:08 s 1 +13971.063 0 +395121.53 7420.0 – C57
2021-01-05 20:24:08 S 06 45 30.631 -57 06 39.74 – V C57
2021-01-05 20:24:08 s 1 +13631.031 0 +395235.87 5780.0 – C57
2021-01-05 20:34:08 S 06 45 29.863 -57 07 00.80 – V C57
2021-01-05 20:34:08 s 1 +13290.972 0 +395349.31 4170.0 – C57
2021-01-05 20:44:08 S 06 45 29.323 -57 07 22.19 – V C57
2021-01-05 20:44:08 s 1 +12950.888 0 +395461.83 2580.0 – C57
2021-01-05 20:54:08 S 06 45 28.447 -57 07 46.16 – V C57
2021-01-05 20:54:08 s 1 +12610.779 0 +395573.44 1030.0 – C57
2021-01-05 21:04:08 S 06 45 27.605 -57 08 07.30 – V C57
2021-01-05 21:04:08 s 1 +12270.646 0 +395684.14 9510.0 – C57
2021-01-05 21:14:08 S 06 45 27.146 -57 08 29.29 – V C57
2021-01-05 21:14:08 s 1 +11930.489 0 +395793.94 8010.0 – C57
2021-01-05 21:24:08 S 06 45 26.126 -57 08 52.12 – V C57
2021-01-05 21:24:08 s 1 +11590.310 0 +395902.82 6540.0 – C57
2021-01-05 21:34:08 S 06 45 25.318 -57 09 12.89 – V C57
2021-01-05 21:34:08 s 1 +11250.109 0 +396010.80 5090.0 – C57
2021-01-05 21:44:08 S 06 45 24.778 -57 09 34.67 – V C57
2021-01-05 21:44:08 s 1 +10909.887 0 +396117.87 3670.0 – C57
2021-01-05 21:54:08 S 06 45 23.902 -57 09 56.81 – V C57
2021-01-05 21:54:08 s 1 +10569.645 0 +396224.03 2270.0 – C57
2021-01-05 22:04:08 S 06 45 23.182 -57 10 19.92 – V C57
2021-01-05 22:04:08 s 1 +10229.383 0 +396329.29 890.0 – C57
2021-01-05 22:14:08 S 06 45 22.514 -57 10 41.59 – V C57
2021-01-05 22:24:08 S 06 45 21.708 -57 11 04.06 – V C57
2021-01-05 22:34:08 S 06 45 20.873 -57 11 25.84 – V C57
2021-01-05 22:44:08 S 06 45 20.198 -57 11 47.83 – V C57
2021-01-05 22:54:08 S 06 45 19.526 -57 12 10.37 – V C57
2021-01-05 23:04:08 S 06 45 18.662 -57 12 32.33 – V C57
2021-01-05 23:14:08 S 06 45 17.957 -57 12 53.46 – V C57
2021-01-05 23:24:08 S 06 45 17.275 -57 13 15.67 – V C57
2021-01-05 23:34:08 S 06 45 16.330 -57 13 39.36 – V C57
2021-01-05 23:44:08 S 06 45 15.607 -57 13 59.77 – V C57
2021-01-05 23:54:08 S 06 45 14.846 -57 14 22.09 – V C57
2021-01-06 00:04:08 S 06 45 14.126 -57 14 44.77 – V C57
2021-01-06 00:14:08 S 06 45 13.315 -57 15 05.29 – V C57
2021-01-06 00:24:08 S 06 45 12.734 -57 15 28.19 – 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)