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
2020-12-26 13:14:08 S 06 57 01.862 -47 37 00.44 – V C57
2020-12-26 13:14:08 s 1 -142433.68 7 +345264.61 5310.0 – C57
2020-12-26 13:24:08 S 06 57 01.502 -47 37 23.59 – V C57
2020-12-26 13:24:08 s 1 -142698.98 4 +344940.25 6600.0 – C57
2020-12-26 13:34:08 S 06 57 00.907 -47 37 47.06 – V C57
2020-12-26 13:34:08 s 1 -142963.88 4 +344614.95 7280.0 – C57
2020-12-26 13:44:08 S 06 57 00.403 -47 38 10.72 – V C57
2020-12-26 13:44:08 s 1 -143228.38 6 +344288.69 7340.0 – C57
2020-12-26 13:54:08 S 06 57 00.024 -47 38 35.05 – V C57
2020-12-26 13:54:08 s 1 -143492.48 7 +343961.49 6800.0 – C57
2020-12-26 14:04:08 S 06 56 59.573 -47 38 59.24 – V C57
2020-12-26 14:04:08 s 1 -143756.18 8 +343633.34 5630.0 – C57
2020-12-26 14:14:08 S 06 56 58.999 -47 39 22.97 – V C57
2020-12-26 14:14:08 s 1 -144019.48 6 +343304.24 3840.0 – C57
2020-12-26 14:24:08 S 06 56 58.524 -47 39 47.20 – V C57
2020-12-26 14:24:08 s 1 -144282.38 1 +342974.20 1440.0 – C57
2020-12-26 14:34:08 S 06 56 58.056 -47 40 11.17 – V C57
2020-12-26 14:34:08 s 1 -144544.87 0 +342643.20 8410.0 – C57
2020-12-26 14:44:08 S 06 56 57.672 -47 40 34.79 – V C57
2020-12-26 14:44:08 s 1 -144806.95 2 +342311.25 4750.0 – C57
2020-12-26 14:54:08 S 06 56 57.034 -47 41 00.02 – V C57
2020-12-26 14:54:08 s 1 -145068.62 6 +341978.35 470.0 – C57
2020-12-26 15:04:08 S 06 56 56.582 -47 41 22.85 – V C57
2020-12-26 15:04:08 s 1 -145329.89 0 +341644.50 5560.0 – C57
2020-12-26 15:14:08 S 06 56 56.230 -47 41 46.25 – V C57
2020-12-26 15:14:08 s 1 -145590.74 4 +341309.70 10.0 – C57
2020-12-26 15:24:08 S 06 56 55.716 -47 42 11.45 – V C57
2020-12-26 15:24:08 s 1 -145851.18 5 +340973.94 3830.0 – C57
2020-12-26 15:34:08 S 06 56 55.183 -47 42 34.81 – V C57
2020-12-26 15:34:08 s 1 -146111.21 2 +340637.23 7020.0 – C57
2020-12-26 15:44:08 S 06 56 54.689 -47 42 58.64 – V C57
2020-12-26 15:44:08 s 1 -146370.82 4 +340299.57 9570.0 – C57
2020-12-26 15:54:08 S 06 56 54.118 -47 43 22.48 – V C57
2020-12-26 15:54:08 s 1 -146630.02 0 +339960.95 1480.0 – C57
2020-12-26 16:04:08 S 06 56 53.777 -47 43 45.84 – V C57
2020-12-26 16:04:08 s 1 -146888.79 7 +339621.37 2740.0 – C57
2020-12-26 16:14:08 S 06 56 53.270 -47 44 10.14 – V C57
2020-12-26 16:14:08 s 1 -147147.15 5 +339280.84 3370.0 – C57
2020-12-26 16:24:08 S 06 56 52.762 -47 44 33.86 – V C57
2020-12-26 16:24:08 s 1 -147405.09 1 +338939.36 3340.0 – C57
2020-12-26 16:34:08 S 06 56 52.418 -47 44 57.98 – V C57
2020-12-26 16:34:08 s 1 -147662.60 6 +338596.91 2670.0 – C57
2020-12-26 16:44:08 S 06 56 51.859 -47 45 21.92 – V C57
2020-12-26 16:44:08 s 1 -147919.69 6 +338253.51 1350.0 – C57
2020-12-26 16:54:08 S 06 56 51.288 -47 45 45.68 – V C57
2020-12-26 16:54:08 s 1 -148176.36 1 +337909.15 9370.0 – C57
2020-12-26 17:04:08 S 06 56 50.873 -47 46 08.83 – V C57
2020-12-26 17:04:08 s 1 -148432.59 9 +337563.83 6740.0 – C57
2020-12-26 17:14:08 S 06 56 50.417 -47 46 33.35 – V C57
2020-12-26 17:14:08 s 1 -148688.40 8 +337217.55 3460.0 – 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)