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
2021-01-30 18:14:07 s 1 +95766.133 0 +316608.49 3570.0 – C57
2021-01-30 18:24:07 S 05 33 32.162 -75 21 33.37 – V C57
2021-01-30 18:24:07 s 1 +95459.263 0 +317009.92 9410.0 – C57
2021-01-30 18:34:07 S 05 33 30.019 -75 21 50.76 – V C57
2021-01-30 18:34:07 s 1 +95152.016 0 +317410.09 4520.0 – C57
2021-01-30 18:44:07 S 05 33 27.050 -75 22 08.15 – V C57
2021-01-30 18:44:07 s 1 +94844.395 0 +317809.01 8910.0 – C57
2021-01-30 18:54:07 S 05 33 24.461 -75 22 26.83 – V C57
2021-01-30 18:54:07 s 1 +94536.401 0 +318206.68 2590.0 – C57
2021-01-30 19:04:07 S 05 33 21.780 -75 22 43.50 – V C57
2021-01-30 19:04:07 s 1 +94228.036 0 +318603.10 5540.0 – C57
2021-01-30 19:14:07 S 05 33 19.334 -75 22 58.98 – V C57
2021-01-30 19:14:07 s 1 +93919.304 0 +318998.27 7790.0 – C57
2021-01-30 19:24:07 S 05 33 16.337 -75 23 17.63 – V C57
2021-01-30 19:24:07 s 1 +93610.205 0 +319392.20 9330.0 – C57
2021-01-30 19:34:07 S 05 33 13.853 -75 23 35.56 – V C57
2021-01-30 19:34:07 s 1 +93300.743 0 +319784.88 170.0 – C57
2021-01-30 19:44:07 S 05 33 11.306 -75 23 52.19 – V C57
2021-01-30 19:44:07 s 1 +92990.919 0 +320176.32 310.0 – C57
2021-01-30 19:54:07 S 05 33 08.453 -75 24 08.57 – V C57
2021-01-30 19:54:07 s 1 +92680.736 0 +320566.51 9750.0 – C57
2021-01-30 20:04:07 S 05 33 05.750 -75 24 26.42 – V C57
2021-01-30 20:04:07 s 1 +92370.195 0 +320955.47 8500.0 – C57
2021-01-30 20:14:07 S 05 33 03.262 -75 24 43.06 – V C57
2021-01-30 20:14:07 s 1 +92059.298 0 +321343.19 6560.0 – C57
2021-01-30 20:24:07 S 05 33 00.391 -75 24 59.00 – V C57
2021-01-30 20:24:07 s 1 +91748.049 0 +321729.67 3940.0 – C57
2021-01-30 20:34:07 S 05 32 57.809 -75 25 17.36 – V C57
2021-01-30 20:34:07 s 1 +91436.448 0 +322114.91 630.0 – C57
2021-01-30 20:44:07 S 05 32 54.888 -75 25 34.36 – V C57
2021-01-30 20:44:07 s 1 +91124.498 0 +322498.93 6650.0 – C57
2021-01-30 20:54:07 S 05 32 52.596 -75 25 51.49 – V C57
2021-01-30 20:54:07 s 1 +90812.201 0 +322881.71 2000.0 – C57
2021-01-30 21:04:07 S 05 32 49.394 -75 26 08.52 – V C57
2021-01-30 21:04:07 s 1 +90499.560 0 +323263.26 6680.0 – C57
2021-01-30 21:14:07 S 05 32 46.735 -75 26 25.69 – V C57
2021-01-30 21:14:07 s 1 +90186.575 0 +323643.59 690.0 – C57
2021-01-30 21:24:07 S 05 32 44.237 -75 26 42.79 – V C57
2021-01-30 21:24:07 s 1 +89873.250 0 +324022.68 4040.0 – C57
2021-01-30 21:34:07 S 05 32 41.671 -75 26 59.60 – V C57
2021-01-30 21:34:07 s 1 +89559.586 0 +324400.56 6740.0 – C57
2021-01-30 21:44:07 S 05 32 38.878 -75 27 16.99 – V C57
2021-01-30 21:44:07 s 1 +89245.584 0 +324777.20 8770.0 – C57
2021-01-30 21:54:07 S 05 32 36.180 -75 27 33.19 – V C57
2021-01-30 21:54:07 s 1 +88931.249 0 +325152.63 160.0 – C57
2021-01-30 22:04:07 S 05 32 33.454 -75 27 49.93 – V C57
2021-01-30 22:04:07 s 1 +88616.580 0 +325526.84 900.0 – C57
2021-01-30 22:14:07 S 05 32 30.744 -75 28 08.18 – V C57
2021-01-30 22:14:07 s 1 +88301.581 0 +325899.83 1000.0 – C57
2021-01-30 22:24:07 S 05 32 27.931 -75 28 24.85 – 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)