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
2020-12-24 19:14:08 S 06 58 57.372 -45 54 16.88 – V C57
2020-12-24 19:14:08 s 1 -66032.339 0 +398035.81 2740.0 – C57
2020-12-24 19:24:08 S 06 58 56.849 -45 54 41.26 – V C57
2020-12-24 19:24:08 s 1 -66362.688 0 +397937.21 7900.0 – C57
2020-12-24 19:34:08 S 06 58 56.534 -45 55 05.74 – V C57
2020-12-24 19:34:08 s 1 -66692.892 0 +397837.75 2810.0 – C57
2020-12-24 19:44:08 S 06 58 56.155 -45 55 30.97 – V C57
2020-12-24 19:44:08 s 1 -67022.952 0 +397737.42 7470.0 – C57
2020-12-24 19:54:08 S 06 58 55.490 -45 55 56.57 – V C57
2020-12-24 19:54:08 s 1 -67352.866 0 +397636.22 1880.0 – C57
2020-12-24 20:04:08 S 06 58 55.027 -45 56 21.01 – V C57
2020-12-24 20:04:08 s 1 -67682.633 0 +397534.15 6040.0 – C57
2020-12-24 20:14:08 S 06 58 54.730 -45 56 45.89 – V C57
2020-12-24 20:14:08 s 1 -68012.254 0 +397431.22 9940.0 – C57
2020-12-24 20:24:08 S 06 58 54.358 -45 57 11.12 – V C57
2020-12-24 20:24:08 s 1 -68341.726 0 +397327.41 3580.0 – C57
2020-12-24 20:34:08 S 06 58 53.916 -45 57 35.78 – V C57
2020-12-24 20:34:08 s 1 -68671.050 0 +397222.74 6960.0 – C57
2020-12-24 20:44:08 S 06 58 53.381 -45 58 01.27 – V C57
2020-12-24 20:44:08 s 1 -69000.224 0 +397117.20 90.0 – C57
2020-12-24 20:54:08 S 06 58 53.021 -45 58 25.68 – V C57
2020-12-24 20:54:08 s 1 -69329.248 0 +397010.79 2960.0 – C57
2020-12-24 21:04:08 S 06 58 52.601 -45 58 50.20 – V C57
2020-12-24 21:04:08 s 1 -69658.120 0 +396903.51 5560.0 – C57
2020-12-24 21:14:08 S 06 58 52.178 -45 59 14.03 – V C57
2020-12-24 21:14:08 s 1 -69986.841 0 +396795.37 7910.0 – C57
2020-12-24 21:24:08 S 06 58 51.679 -45 59 39.91 – V C57
2020-12-24 21:24:08 s 1 -70315.409 0 +396686.35 9990.0 – C57
2020-12-24 21:34:08 S 06 58 51.413 -46 00 04.39 – V C57
2020-12-24 21:34:08 s 1 -70643.823 0 +396576.46 1810.0 – C57
2020-12-24 21:44:08 S 06 58 50.705 -46 00 29.74 – V C57
2020-12-24 21:44:08 s 1 -70972.083 0 +396465.71 3360.0 – C57
2020-12-24 21:54:08 S 06 58 50.434 -46 00 54.22 – V C57
2020-12-24 21:54:08 s 1 -71300.188 0 +396354.09 4650.0 – C57
2020-12-24 22:04:08 S 06 58 49.826 -46 01 18.77 – V C57
2020-12-24 22:04:08 s 1 -71628.137 0 +396241.60 5670.0 – C57
2020-12-24 22:14:08 S 06 58 49.517 -46 01 44.58 – V C57
2020-12-24 22:14:08 s 1 -71955.929 0 +396128.24 6420.0 – C57
2020-12-24 22:24:08 S 06 58 49.049 -46 02 12.26 – V C57
2020-12-24 22:24:08 s 1 -72283.563 0 +396014.00 6900.0 – C57
2020-12-24 22:34:08 S 06 58 48.617 -46 02 32.50 – V C57
2020-12-24 22:34:08 s 1 -72611.040 0 +395898.90 7110.0 – C57
2020-12-24 22:44:08 S 06 58 48.094 -46 02 59.71 – V C57
2020-12-24 22:44:08 s 1 -72938.357 0 +395782.94 7050.0 – C57
2020-12-24 22:54:08 S 06 58 47.777 -46 03 24.16 – V C57
2020-12-24 22:54:08 s 1 -73265.514 0 +395666.10 6710.0 – C57
2020-12-24 23:04:08 S 06 58 47.342 -46 03 48.49 – V C57
2020-12-24 23:04:08 s 1 -73592.510 0 +395548.39 6100.0 – C57
2020-12-24 23:14:08 S 06 58 46.874 -46 04 13.62 – V C57
2020-12-24 23:14:08 s 1 -73919.345 0 +395429.81 5220.0 – 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)