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
2021-02-04 06:54:07 s 1 -122634.07 3 +356591.23 6230.0 – C57
2021-02-04 07:04:07 S 04 57 48.439 -78 09 08.24 – V C57
2021-02-04 07:04:07 s 1 -122927.91 4 +356342.71 5490.0 – C57
2021-02-04 07:14:07 S 04 57 44.472 -78 09 21.31 – V C57
2021-02-04 07:14:07 s 1 -123221.42 8 +356093.26 4230.0 – C57
2021-02-04 07:24:07 S 04 57 40.517 -78 09 36.29 – V C57
2021-02-04 07:24:07 s 1 -123514.61 3 +355842.86 2440.0 – C57
2021-02-04 07:34:07 S 04 57 36.538 -78 09 51.48 – V C57
2021-02-04 07:34:07 s 1 -123807.46 7 +355591.51 120.0 – C57
2021-02-04 07:44:07 S 04 57 32.570 -78 10 02.86 – V C57
2021-02-04 07:44:07 s 1 -124099.99 0 +355339.22 7280.0 – C57
2021-02-04 07:54:07 S 04 57 28.351 -78 10 16.57 – V C57
2021-02-04 07:54:07 s 1 -124392.18 1 +355085.99 3900.0 – C57
2021-02-04 08:04:07 S 04 57 24.684 -78 10 31.15 – V C57
2021-02-04 08:04:07 s 1 -124684.03 8 +354831.82 9990.0 – C57
2021-02-04 08:14:07 S 04 57 20.686 -78 10 44.18 – V C57
2021-02-04 08:14:07 s 1 -124975.56 0 +354576.70 5540.0 – C57
2021-02-04 08:24:07 S 04 57 16.759 -78 10 58.22 – V C57
2021-02-04 08:24:07 s 1 -125266.74 7 +354320.63 550.0 – C57
2021-02-04 08:34:07 S 04 57 12.900 -78 11 12.16 – V C57
2021-02-04 08:34:07 s 1 -125557.59 6 +354063.62 5030.0 – C57
2021-02-04 08:44:07 S 04 57 08.729 -78 11 25.80 – V C57
2021-02-04 08:44:07 s 1 -125848.10 7 +353805.66 8960.0 – C57
2021-02-04 08:54:07 S 04 57 04.627 -78 11 38.87 – V C57
2021-02-04 08:54:07 s 1 -126138.27 9 +353546.76 2350.0 – C57
2021-02-04 09:04:07 S 04 57 00.720 -78 11 53.27 – V C57
2021-02-04 09:04:07 s 1 -126428.11 0 +353286.91 5190.0 – C57
2021-02-04 09:14:07 S 04 56 57.240 -78 12 06.26 – V C57
2021-02-04 09:14:07 s 1 -126717.60 0 +353026.12 7480.0 – C57
2021-02-04 09:24:07 S 04 56 53.364 -78 12 20.09 – V C57
2021-02-04 09:24:07 s 1 -127006.74 6 +352764.37 9220.0 – C57
2021-02-04 09:34:07 S 04 56 49.330 -78 12 33.70 – V C57
2021-02-04 09:34:07 s 1 -127295.54 9 +352501.68 410.0 – C57
2021-02-04 09:44:07 S 04 56 45.269 -78 12 46.19 – V C57
2021-02-04 09:44:07 s 1 -127584.00 7 +352238.04 1040.0 – C57
2021-02-04 09:54:07 S 04 56 40.985 -78 13 00.01 – V C57
2021-02-04 09:54:07 s 1 -127872.11 8 +351973.45 1110.0 – C57
2021-02-04 10:04:07 S 04 56 37.255 -78 13 13.76 – V C57
2021-02-04 10:04:07 s 1 -128159.88 1 +351707.92 630.0 – C57
2021-02-04 10:14:07 S 04 56 33.120 -78 13 28.42 – V C57
2021-02-04 10:14:07 s 1 -128447.29 6 +351441.43 9580.0 – C57
2021-02-04 10:24:07 S 04 56 29.182 -78 13 42.35 – V C57
2021-02-04 10:24:07 s 1 -128734.36 0 +351173.99 7970.0 – C57
2021-02-04 10:34:07 S 04 56 24.893 -78 13 54.95 – V C57
2021-02-04 10:34:07 s 1 -129021.07 4 +350905.61 5800.0 – C57
2021-02-04 10:44:07 S 04 56 21.434 -78 14 08.95 – V C57
2021-02-04 10:44:07 s 1 -129307.43 5 +350636.27 3050.0 – C57
2021-02-04 10:54:07 S 04 56 17.311 -78 14 22.13 – V C57
2021-02-04 10:54:07 s 1 -129593.44 3 +350365.99 9740.0 – C57
2021-02-04 11:04:07 S 04 56 13.663 -78 14 36.56 – 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)