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
2021-01-14 13:04:08 s 1 +120839.60 6 +11566.734 4000.0 – C57
2021-01-14 13:24:08 S 06 29 47.885 -63 52 02.03 – V C57
2021-01-14 13:24:08 s 1 +122039.50 3 +13882.471 9830.0 – C57
2021-01-14 13:34:08 S 06 29 47.410 -63 52 24.60 – V C57
2021-01-14 13:34:08 s 1 +122625.80 8 +15038.816 9440.0 – C57
2021-01-14 13:44:08 S 06 29 46.733 -63 52 46.16 – V C57
2021-01-14 13:44:08 s 1 +123203.17 0 +16194.056 3770.0 – C57
2021-01-14 13:54:08 S 06 29 46.068 -63 53 07.33 – V C57
2021-01-14 13:54:08 s 1 +123771.70 0 +17348.127 3010.0 – C57
2021-01-14 14:04:08 S 06 29 45.600 -63 53 29.76 – V C57
2021-01-14 14:04:08 s 1 +124331.50 9 +18500.968 7350.0 – C57
2021-01-14 14:14:08 S 06 29 45.077 -63 53 51.76 – V C57
2021-01-14 14:14:08 s 1 +124882.70 5 +19652.519 6980.0 – C57
2021-01-14 14:34:08 S 06 29 43.999 -63 54 35.42 – V C57
2021-01-14 14:34:08 s 1 +125959.68 9 +21951.528 2830.0 – C57
2021-01-14 14:44:08 S 06 29 43.229 -63 54 57.42 – V C57
2021-01-14 14:44:08 s 1 +126485.68 9 +23098.878 9420.0 – C57
2021-01-14 14:54:08 S 06 29 42.638 -63 55 19.88 – V C57
2021-01-14 14:54:08 s 1 +127003.49 7 +24244.725 2010.0 – C57
2021-01-14 15:04:08 S 06 29 42.271 -63 55 42.20 – V C57
2021-01-14 15:04:08 s 1 +127513.21 7 +25389.021 790.0 – C57
2021-01-14 15:14:08 S 06 29 41.364 -63 56 03.44 – V C57
2021-01-14 15:14:08 s 1 +128014.94 8 +26531.717 5920.0 – C57
2021-01-14 15:44:08 S 06 29 39.473 -63 57 07.92 – V C57
2021-01-14 15:44:08 s 1 +129473.19 6 +29949.783 1110.0 – C57
2021-01-14 15:54:08 S 06 29 39.190 -63 57 30.85 – V C57
2021-01-14 15:54:08 s 1 +129943.95 1 +31085.660 3330.0 – C57
2021-01-14 16:04:08 S 06 29 38.335 -63 57 51.91 – V C57
2021-01-14 16:04:08 s 1 +130407.19 9 +32219.734 2730.0 – C57
2021-01-14 16:14:08 S 06 29 37.627 -63 58 13.62 – V C57
2021-01-14 16:14:08 s 1 +130863.03 3 +33351.968 9460.0 – C57
2021-01-14 16:24:08 S 06 29 37.210 -63 58 36.08 – V C57
2021-01-14 16:24:08 s 1 +131311.54 2 +34482.329 3680.0 – C57
2021-01-14 16:34:08 S 06 29 36.271 -63 58 57.14 – V C57
2021-01-14 16:34:08 s 1 +131752.81 8 +35610.783 5540.0 – C57
2021-01-14 16:54:08 S 06 29 34.980 -63 59 41.32 – V C57
2021-01-14 16:54:08 s 1 +132614.01 9 +37861.845 2800.0 – C57
2021-01-14 17:04:08 S 06 29 34.366 -64 00 03.24 – V C57
2021-01-14 17:04:08 s 1 +133034.11 7 +38984.394 8490.0 – C57
2021-01-14 17:14:08 S 06 29 33.821 -64 00 25.09 – V C57
2021-01-14 17:14:08 s 1 +133447.32 6 +40104.918 2410.0 – C57
2021-01-14 17:24:08 S 06 29 33.322 -64 00 47.56 – V C57
2021-01-14 17:24:08 s 1 +133853.73 0 +41223.389 4710.0 – C57
2021-01-14 17:34:08 S 06 29 32.398 -64 01 08.62 – V C57
2021-01-14 17:34:08 s 1 +134253.41 0 +42339.783 5530.0 – C57
2021-01-14 17:44:08 S 06 29 31.735 -64 01 29.64 – V C57
2021-01-14 17:44:08 s 1 +134646.44 7 +43454.075 5000.0 – C57
2021-01-14 18:04:08 S 06 29 30.353 -64 02 14.53 – V C57
2021-01-14 18:04:08 s 1 +135412.91 1 +45676.264 440.0 – C57
2021-01-14 18:14:08 S 06 29 29.822 -64 02 37.07 – 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)