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
2021-01-21 12:34:08 S 06 09 52.022 -69 15 05.15 – V C57
2021-01-21 12:34:08 s 1 -103981.65 8 +374927.19 9480.0 – C57
2021-01-21 12:44:08 S 06 09 50.446 -69 15 22.18 – V C57
2021-01-21 12:44:08 s 1 -104293.57 8 +374744.23 9670.0 – C57
2021-01-21 12:54:08 S 06 09 48.886 -69 15 39.42 – V C57
2021-01-21 12:54:08 s 1 -104605.25 0 +374560.36 9450.0 – C57
2021-01-21 13:04:08 S 06 09 47.345 -69 15 56.81 – V C57
2021-01-21 13:04:08 s 1 -104916.67 6 +374375.57 8810.0 – C57
2021-01-21 13:14:08 S 06 09 45.727 -69 16 13.44 – V C57
2021-01-21 13:14:08 s 1 -105227.85 2 +374189.87 7760.0 – C57
2021-01-21 13:24:08 S 06 09 44.258 -69 16 29.86 – V C57
2021-01-21 13:24:08 s 1 -105538.77 9 +374003.25 6290.0 – C57
2021-01-21 13:34:08 S 06 09 43.090 -69 16 47.10 – V C57
2021-01-21 13:34:08 s 1 -105849.45 6 +373815.73 4410.0 – C57
2021-01-21 13:44:08 S 06 09 41.614 -69 17 04.16 – V C57
2021-01-21 13:44:08 s 1 -106159.88 1 +373627.29 2100.0 – C57
2021-01-21 13:54:08 S 06 09 40.034 -69 17 22.13 – V C57
2021-01-21 13:54:08 s 1 -106470.05 3 +373437.93 9370.0 – C57
2021-01-21 14:04:08 S 06 09 38.354 -69 17 38.04 – V C57
2021-01-21 14:04:08 s 1 -106779.97 3 +373247.66 6220.0 – C57
2021-01-21 14:14:08 S 06 09 36.857 -69 17 54.60 – V C57
2021-01-21 14:14:08 s 1 -107089.63 8 +373056.48 2640.0 – C57
2021-01-21 14:24:08 S 06 09 35.477 -69 18 12.02 – V C57
2021-01-21 14:24:08 s 1 -107399.04 7 +372864.38 8630.0 – C57
2021-01-21 14:34:08 S 06 09 33.840 -69 18 28.87 – V C57
2021-01-21 14:34:08 s 1 -107708.20 1 +372671.37 4190.0 – C57
2021-01-21 14:44:08 S 06 09 32.422 -69 18 45.61 – V C57
2021-01-21 14:44:08 s 1 -108017.09 7 +372477.44 9330.0 – C57
2021-01-21 14:54:08 S 06 09 31.034 -69 19 03.14 – V C57
2021-01-21 14:54:08 s 1 -108325.73 5 +372282.60 4030.0 – C57
2021-01-21 15:04:08 S 06 09 29.441 -69 19 20.39 – V C57
2021-01-21 15:04:08 s 1 -108634.11 3 +372086.84 8300.0 – C57
2021-01-21 15:14:08 S 06 09 27.943 -69 19 37.20 – V C57
2021-01-21 15:14:08 s 1 -108942.23 2 +371890.17 2130.0 – C57
2021-01-21 15:44:08 S 06 09 23.290 -69 20 27.46 – V C57
2021-01-21 15:44:08 s 1 -109865.01 6 +371294.65 990.0 – C57
2021-01-21 15:54:08 S 06 09 21.948 -69 20 45.02 – V C57
2021-01-21 15:54:08 s 1 -110172.08 3 +371094.31 3060.0 – C57
2021-01-21 16:04:08 S 06 09 20.575 -69 21 01.33 – V C57
2021-01-21 16:04:08 s 1 -110478.88 6 +370893.06 4680.0 – C57
2021-01-21 16:14:08 S 06 09 18.816 -69 21 17.89 – V C57
2021-01-21 16:14:08 s 1 -110785.42 2 +370690.89 5860.0 – C57
2021-01-21 16:24:08 S 06 09 17.390 -69 21 35.17 – V C57
2021-01-21 16:24:08 s 1 -111091.69 1 +370487.80 6600.0 – C57
2021-01-21 16:34:08 S 06 09 15.725 -69 21 51.48 – V C57
2021-01-21 16:34:08 s 1 -111397.69 3 +370283.79 6880.0 – C57
2021-01-21 16:44:08 S 06 09 14.220 -69 22 07.50 – V C57
2021-01-21 16:44:08 s 1 -111703.42 4 +370078.87 6710.0 – C57
2021-01-21 16:54:08 S 06 09 12.958 -69 22 25.72 – V C57
2021-01-21 16:54:08 s 1 -112008.88 6 +369873.03 6080.0 – 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)