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
2021-01-31 19:24:07 s 1 +46214.883 0 +363851.40 6050.0 – C57
2021-01-31 19:34:07 S 05 26 28.795 -76 03 39.38 – V C57
2021-01-31 19:34:07 s 1 +45871.292 0 +364079.43 8310.0 – C57
2021-01-31 19:44:07 S 05 26 25.723 -76 03 54.86 – V C57
2021-01-31 19:44:07 s 1 +45527.568 0 +364306.40 280.0 – C57
2021-01-31 19:54:07 S 05 26 23.150 -76 04 12.32 – V C57
2021-01-31 19:54:07 s 1 +45183.713 0 +364532.32 1960.0 – C57
2021-01-31 20:04:07 S 05 26 19.874 -76 04 26.54 – V C57
2021-01-31 20:04:07 s 1 +44839.727 0 +364757.17 3350.0 – C57
2021-01-31 20:14:07 S 05 26 17.974 -76 04 47.14 – V C57
2021-01-31 20:14:07 s 1 +44495.613 0 +364980.97 4460.0 – C57
2021-01-31 20:24:07 S 05 26 13.524 -76 04 55.27 – V C57
2021-01-31 20:24:07 s 1 +44151.370 0 +365203.71 5290.0 – C57
2021-01-31 20:34:07 S 05 26 09.511 -76 05 09.56 – V C57
2021-01-31 20:34:07 s 1 +43807.000 0 +365425.39 5840.0 – C57
2021-01-31 20:44:07 S 05 26 07.795 -76 05 33.86 – V C57
2021-01-31 20:44:07 s 1 +43462.505 0 +365646.02 6110.0 – C57
2021-01-31 20:54:07 S 05 26 05.122 -76 05 49.52 – V C57
2021-01-31 20:54:07 s 1 +43117.886 0 +365865.59 6100.0 – C57
2021-01-31 21:04:07 S 05 26 02.246 -76 06 06.12 – V C57
2021-01-31 21:04:07 s 1 +42773.143 0 +366084.12 5820.0 – C57
2021-01-31 21:14:07 S 05 25 59.215 -76 06 21.78 – V C57
2021-01-31 21:14:07 s 1 +42428.279 0 +366301.59 5270.0 – C57
2021-01-31 21:24:07 S 05 25 56.098 -76 06 38.23 – V C57
2021-01-31 21:24:07 s 1 +42083.293 0 +366518.00 4450.0 – C57
2021-01-31 21:34:07 S 05 25 53.381 -76 06 54.25 – V C57
2021-01-31 21:34:07 s 1 +41738.188 0 +366733.37 3360.0 – C57
2021-01-31 21:44:07 S 05 25 50.167 -76 07 10.70 – V C57
2021-01-31 21:44:07 s 1 +41392.964 0 +366947.69 2010.0 – C57
2021-01-31 21:54:07 S 05 25 47.196 -76 07 26.90 – V C57
2021-01-31 21:54:07 s 1 +41047.623 0 +367160.96 390.0 – C57
2021-01-31 22:04:07 S 05 25 44.604 -76 07 42.38 – V C57
2021-01-31 22:04:07 s 1 +40702.165 0 +367373.18 8510.0 – C57
2021-01-31 22:14:07 S 05 25 41.330 -76 07 58.98 – V C57
2021-01-31 22:14:07 s 1 +40356.592 0 +367584.35 6370.0 – C57
2021-01-31 22:24:07 S 05 25 38.429 -76 08 15.18 – V C57
2021-01-31 22:24:07 s 1 +40010.906 0 +367794.48 3970.0 – C57
2021-01-31 22:34:07 S 05 25 35.414 -76 08 32.35 – V C57
2021-01-31 22:34:07 s 1 +39665.106 0 +368003.57 1320.0 – C57
2021-01-31 22:44:07 S 05 25 32.498 -76 08 47.29 – V C57
2021-01-31 22:44:07 s 1 +39319.195 0 +368211.60 8410.0 – C57
2021-01-31 22:54:07 S 05 25 29.345 -76 09 04.21 – V C57
2021-01-31 22:54:07 s 1 +38973.174 0 +368418.60 5250.0 – C57
2021-01-31 23:04:07 S 05 25 26.563 -76 09 20.81 – V C57
2021-01-31 23:04:07 s 1 +38627.043 0 +368624.55 1840.0 – C57
2021-01-31 23:14:07 S 05 25 23.246 -76 09 36.76 – V C57
2021-01-31 23:14:07 s 1 +38280.803 0 +368829.46 8190.0 – C57
2021-01-31 23:24:07 S 05 25 20.434 -76 09 52.85 – V C57
2021-01-31 23:24:07 s 1 +37934.457 0 +369033.33 4290.0 – C57
2021-01-31 23:34:07 S 05 25 17.417 -76 10 09.70 – 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)