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 18:44:08 S 06 53 16.380 -50 33 32.51 – V C57
2020-12-29 18:44:08 s 1 -180475.59 3 +76206.745 4500.0 – C57
2020-12-29 18:54:08 S 06 53 15.941 -50 33 54.68 – V C57
2020-12-29 18:54:08 s 1 -180184.21 8 +75327.182 9270.0 – C57
2020-12-29 19:04:08 S 06 53 15.521 -50 34 15.02 – V C57
2020-12-29 19:04:08 s 1 -179889.46 1 +74446.214 8970.0 – C57
2020-12-29 19:14:08 S 06 53 14.902 -50 34 36.12 – V C57
2020-12-29 19:14:08 s 1 -179591.29 5 +73563.843 3580.0 – C57
2020-12-29 19:24:08 S 06 53 14.429 -50 34 57.40 – V C57
2020-12-29 19:24:08 s 1 -179289.69 5 +72680.075 3060.0 – C57
2020-12-29 19:34:08 S 06 53 14.028 -50 35 18.02 – V C57
2020-12-29 19:34:08 s 1 -178984.63 4 +71794.911 7360.0 – C57
2020-12-29 19:44:08 S 06 53 13.668 -50 35 39.98 – V C57
2020-12-29 19:44:08 s 1 -178676.08 6 +70908.357 6460.0 – C57
2020-12-29 19:54:08 S 06 53 13.219 -50 36 02.41 – V C57
2020-12-29 19:54:08 s 1 -178364.02 2 +70020.416 300.0 – C57
2020-12-29 20:04:08 S 06 53 12.778 -50 36 22.50 – V C57
2020-12-29 20:04:08 s 1 -178048.41 6 +69131.093 8840.0 – C57
2020-12-29 20:14:08 S 06 53 12.458 -50 36 43.99 – V C57
2020-12-29 20:14:08 s 1 -177729.23 9 +68240.391 2060.0 – C57
2020-12-29 20:24:08 S 06 53 12.077 -50 37 05.20 – V C57
2020-12-29 20:24:08 s 1 -177406.46 4 +67348.315 9890.0 – C57
2020-12-29 20:54:08 S 06 53 10.603 -50 38 08.30 – V C57
2020-12-29 20:54:08 s 1 -176416.26 4 +64663.895 730.0 – C57
2020-12-29 21:04:08 S 06 53 10.262 -50 38 30.23 – V C57
2020-12-29 21:04:08 s 1 -176078.80 8 +63766.374 6640.0 – C57
2020-12-29 21:14:08 S 06 53 09.847 -50 38 51.83 – V C57
2020-12-29 21:14:08 s 1 -175737.60 9 +62867.505 6960.0 – C57
2020-12-29 21:24:08 S 06 53 09.468 -50 39 11.88 – V C57
2020-12-29 21:24:08 s 1 -175392.63 6 +61967.294 1650.0 – C57
2020-12-29 21:34:08 S 06 53 09.120 -50 39 32.83 – V C57
2020-12-29 21:34:08 s 1 -175043.85 9 +61065.746 660.0 – C57
2020-12-29 21:44:08 S 06 53 08.606 -50 39 54.86 – V C57
2020-12-29 21:44:08 s 1 -174691.24 7 +60162.867 3950.0 – C57
2020-12-29 21:54:08 S 06 53 08.234 -50 40 15.92 – V C57
2020-12-29 21:54:08 s 1 -174334.77 0 +59258.665 1460.0 – C57
2020-12-29 22:04:08 S 06 53 07.742 -50 40 36.48 – V C57
2020-12-29 22:04:08 s 1 -173974.39 4 +58353.144 3160.0 – C57
2020-12-29 22:14:08 S 06 53 07.354 -50 40 58.15 – V C57
2020-12-29 22:14:08 s 1 -173610.09 0 +57446.313 9000.0 – C57
2020-12-29 22:24:08 S 06 53 06.946 -50 41 19.64 – V C57
2020-12-29 22:24:08 s 1 -173241.82 3 +56538.178 8930.0 – C57
2020-12-29 22:34:08 S 06 53 06.434 -50 41 40.31 – V C57
2020-12-29 22:34:08 s 1 -172869.56 3 +55628.747 2890.0 – C57
2020-12-29 22:44:08 S 06 53 05.993 -50 42 01.30 – V C57
2020-12-29 22:44:08 s 1 -172493.27 6 +54718.027 860.0 – C57
2020-12-29 22:54:08 S 06 53 05.681 -50 42 23.08 – V C57
2020-12-29 22:54:08 s 1 -172112.92 8 +53806.026 2760.0 – C57
2020-12-29 23:04:08 S 06 53 05.323 -50 42 43.38 – V C57
2020-12-29 23:04:08 s 1 -171728.48 6 +52892.751 8560.0 – 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)