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
2020-12-29 13:24:08 S 06 53 30.576 -50 22 06.56 – V C57
2020-12-29 13:24:08 s 1 -188155.46 4 +103596.63 2120.0 – C57
2020-12-29 13:34:08 S 06 53 30.005 -50 22 28.09 – V C57
2020-12-29 13:34:08 s 1 -187960.14 7 +102763.14 650.0 – C57
2020-12-29 13:44:08 S 06 53 29.616 -50 22 49.37 – V C57
2020-12-29 13:44:08 s 1 -187762.14 8 +101928.19 5170.0 – C57
2020-12-29 13:54:08 S 06 53 29.174 -50 23 11.69 – V C57
2020-12-29 13:54:08 s 1 -187561.44 7 +101091.79 5640.0 – C57
2020-12-29 14:04:08 S 06 53 28.795 -50 23 32.57 – V C57
2020-12-29 14:04:08 s 1 -187358.02 6 +100253.93 2030.0 – C57
2020-12-29 14:14:08 S 06 53 28.195 -50 23 54.67 – V C57
2020-12-29 14:14:08 s 1 -187151.86 7 +99414.626 4320.0 – C57
2020-12-29 14:24:08 S 06 53 27.746 -50 24 16.20 – V C57
2020-12-29 14:24:08 s 1 -186942.94 9 +98573.858 2480.0 – C57
2020-12-29 14:34:08 S 06 53 27.319 -50 24 36.97 – V C57
2020-12-29 14:34:08 s 1 -186731.25 5 +97731.636 6480.0 – C57
2020-12-29 14:54:08 S 06 53 26.578 -50 25 19.96 – V C57
2020-12-29 14:54:08 s 1 -186299.45 6 +96042.832 1890.0 – C57
2020-12-29 15:54:08 S 06 53 23.861 -50 27 31.46 – V C57
2020-12-29 15:54:08 s 1 -184935.34 1 +90941.603 5210.0 – C57
2020-12-29 16:04:08 S 06 53 23.263 -50 27 50.65 – V C57
2020-12-29 16:04:08 s 1 -184697.75 1 +90086.331 430.0 – C57
2020-12-29 16:14:08 S 06 53 22.882 -50 28 11.71 – V C57
2020-12-29 16:14:08 s 1 -184457.17 9 +89229.614 1200.0 – C57
2020-12-29 16:24:08 S 06 53 22.522 -50 28 32.38 – V C57
2020-12-29 16:24:08 s 1 -184213.60 5 +88371.455 7470.0 – C57
2020-12-29 16:34:08 S 06 53 22.094 -50 28 54.30 – V C57
2020-12-29 16:34:08 s 1 -183967.00 6 +87511.854 9210.0 – C57
2020-12-29 16:44:08 S 06 53 21.514 -50 29 16.30 – V C57
2020-12-29 16:44:08 s 1 -183717.36 1 +86650.813 6390.0 – C57
2020-12-29 16:54:08 S 06 53 21.106 -50 29 38.00 – V C57
2020-12-29 16:54:08 s 1 -183464.64 6 +85788.334 8980.0 – C57
2020-12-29 17:04:08 S 06 53 20.700 -50 29 58.99 – V C57
2020-12-29 17:04:08 s 1 -183208.83 9 +84924.418 6940.0 – C57
2020-12-29 17:24:08 S 06 53 19.766 -50 30 41.15 – V C57
2020-12-29 17:24:08 s 1 -182687.86 0 +83192.286 8850.0 – C57
2020-12-29 17:34:08 S 06 53 19.222 -50 31 03.76 – V C57
2020-12-29 17:34:08 s 1 -182422.64 1 +82324.074 2730.0 – C57
2020-12-29 17:44:08 S 06 53 18.718 -50 31 25.07 – V C57
2020-12-29 17:44:08 s 1 -182154.23 7 +81454.433 1850.0 – C57
2020-12-29 17:54:08 S 06 53 18.466 -50 31 45.84 – V C57
2020-12-29 17:54:08 s 1 -181882.62 5 +80583.367 6160.0 – C57
2020-12-29 18:04:08 S 06 53 18.079 -50 32 07.62 – V C57
2020-12-29 18:04:08 s 1 -181607.78 1 +79710.878 5640.0 – C57
2020-12-29 18:14:08 S 06 53 17.606 -50 32 29.47 – V C57
2020-12-29 18:14:08 s 1 -181329.68 1 +78836.968 260.0 – C57
2020-12-29 18:24:08 S 06 53 16.915 -50 32 49.99 – V C57
2020-12-29 18:24:08 s 1 -181048.29 9 +77961.641 9960.0 – C57
2020-12-29 18:34:08 S 06 53 16.795 -50 33 11.77 – V C57
2020-12-29 18:34:08 s 1 -180763.61 2 +77084.899 4720.0 – 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)