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
2021-01-08 07:54:08 s 1 -103716.62 8 +379952.74 3460.0 – C57
2021-01-08 08:04:08 S 06 40 42.922 -59 13 52.86 – V C57
2021-01-08 08:04:08 s 1 -104017.93 6 +379754.84 4270.0 – C57
2021-01-08 08:14:08 S 06 40 42.206 -59 14 12.44 – V C57
2021-01-08 08:14:08 s 1 -104318.99 6 +379556.06 4720.0 – C57
2021-01-08 08:24:08 S 06 40 41.215 -59 14 33.11 – V C57
2021-01-08 08:24:08 s 1 -104619.80 6 +379356.41 4780.0 – C57
2021-01-08 08:34:08 S 06 40 40.404 -59 14 54.10 – V C57
2021-01-08 08:34:08 s 1 -104920.36 6 +379155.89 4470.0 – C57
2021-01-08 08:44:08 S 06 40 39.631 -59 15 14.36 – V C57
2021-01-08 08:44:08 s 1 -105220.67 5 +378954.48 3790.0 – C57
2021-01-08 08:54:08 S 06 40 38.556 -59 15 35.06 – V C57
2021-01-08 08:54:08 s 1 -105520.73 2 +378752.20 2730.0 – C57
2021-01-08 09:04:08 S 06 40 37.819 -59 15 55.19 – V C57
2021-01-08 09:04:08 s 1 -105820.53 7 +378549.04 1290.0 – C57
2021-01-08 09:14:08 S 06 40 37.099 -59 16 16.25 – V C57
2021-01-08 09:14:08 s 1 -106120.08 7 +378345.00 9460.0 – C57
2021-01-08 09:24:08 S 06 40 36.098 -59 16 36.77 – V C57
2021-01-08 09:24:08 s 1 -106419.38 2 +378140.09 7260.0 – C57
2021-01-08 09:34:08 S 06 40 35.203 -59 16 56.64 – V C57
2021-01-08 09:34:08 s 1 -106718.42 2 +377934.30 4670.0 – C57
2021-01-08 09:44:08 S 06 40 34.505 -59 17 17.66 – V C57
2021-01-08 09:44:08 s 1 -107017.20 5 +377727.62 1690.0 – C57
2021-01-08 09:54:08 S 06 40 33.655 -59 17 38.18 – V C57
2021-01-08 09:54:08 s 1 -107315.73 1 +377520.07 8330.0 – C57
2021-01-08 10:04:08 S 06 40 32.650 -59 17 58.67 – V C57
2021-01-08 10:04:08 s 1 -107613.99 8 +377311.64 4580.0 – C57
2021-01-08 10:14:08 S 06 40 31.985 -59 18 19.01 – V C57
2021-01-08 10:14:08 s 1 -107912.00 6 +377102.33 440.0 – C57
2021-01-08 10:24:08 S 06 40 31.099 -59 18 38.84 – V C57
2021-01-08 10:24:08 s 1 -108209.75 3 +376892.15 5910.0 – C57
2021-01-08 10:34:08 S 06 40 30.178 -59 19 00.37 – V C57
2021-01-08 10:34:08 s 1 -108507.23 9 +376681.08 990.0 – C57
2021-01-08 10:44:08 S 06 40 29.357 -59 19 19.99 – V C57
2021-01-08 10:44:08 s 1 -108804.46 3 +376469.13 5670.0 – C57
2021-01-08 10:54:08 S 06 40 28.519 -59 19 40.40 – V C57
2021-01-08 10:54:08 s 1 -109101.42 4 +376256.30 9960.0 – C57
2021-01-08 11:04:08 S 06 40 27.588 -59 20 00.13 – V C57
2021-01-08 11:04:08 s 1 -109398.12 1 +376042.59 3850.0 – C57
2021-01-08 11:14:08 S 06 40 26.748 -59 20 22.31 – V C57
2021-01-08 11:14:08 s 1 -109694.55 3 +375828.00 7340.0 – C57
2021-01-08 11:24:08 S 06 40 25.918 -59 20 42.22 – V C57
2021-01-08 11:24:08 s 1 -109990.71 9 +375612.52 440.0 – C57
2021-01-08 11:34:08 S 06 40 24.938 -59 21 02.30 – V C57
2021-01-08 11:34:08 s 1 -110286.61 8 +375396.17 3130.0 – C57
2021-01-08 11:44:08 S 06 40 24.086 -59 21 22.50 – V C57
2021-01-08 11:44:08 s 1 -110582.24 9 +375178.93 5410.0 – C57
2021-01-08 11:54:08 S 06 40 23.431 -59 21 43.34 – V C57
2021-01-08 11:54:08 s 1 -110877.61 2 +374960.81 7290.0 – C57
2021-01-08 12:04:08 S 06 40 22.457 -59 22 02.93 – 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)