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
2020-12-28 19:54:08 S 06 54 20.381 -49 43 42.78 – V C57
2020-12-28 19:54:08 s 1 -196620.42 9 +183159.87 8560.0 – C57
2020-12-28 20:04:08 S 06 54 20.018 -49 44 05.42 – V C57
2020-12-28 20:04:08 s 1 -196631.40 0 +182474.01 6450.0 – C57
2020-12-28 20:14:08 S 06 54 19.687 -49 44 26.92 – V C57
2020-12-28 20:14:08 s 1 -196640.92 4 +181786.83 2170.0 – C57
2020-12-28 20:24:08 S 06 54 19.104 -49 44 50.42 – V C57
2020-12-28 20:24:08 s 1 -196648.99 5 +181098.31 5710.0 – C57
2020-12-28 20:34:08 S 06 54 18.408 -49 45 11.88 – V C57
2020-12-28 20:34:08 s 1 -196655.60 5 +180408.47 7060.0 – C57
2020-12-28 20:44:08 S 06 54 17.933 -49 45 34.56 – V C57
2020-12-28 20:44:08 s 1 -196660.74 6 +179717.30 6200.0 – C57
2020-12-28 20:54:08 S 06 54 17.602 -49 45 57.38 – V C57
2020-12-28 20:54:08 s 1 -196664.41 1 +179024.79 3130.0 – C57
2020-12-28 21:04:08 S 06 54 17.119 -49 46 18.19 – V C57
2020-12-28 21:04:08 s 1 -196666.59 3 +178330.94 7840.0 – C57
2020-12-28 21:14:08 S 06 54 16.505 -49 46 40.08 – V C57
2020-12-28 21:14:08 s 1 -196667.28 3 +177635.76 310.0 – C57
2020-12-28 21:24:08 S 06 54 16.066 -49 47 03.12 – V C57
2020-12-28 21:24:08 s 1 -196666.47 4 +176939.24 530.0 – C57
2020-12-28 21:34:08 S 06 54 15.564 -49 47 25.69 – V C57
2020-12-28 21:34:08 s 1 -196664.15 8 +176241.38 8480.0 – C57
2020-12-28 21:44:08 S 06 54 15.070 -49 47 48.88 – V C57
2020-12-28 21:44:08 s 1 -196660.32 7 +175542.18 4170.0 – C57
2020-12-28 21:54:08 S 06 54 14.566 -49 48 10.44 – V C57
2020-12-28 21:54:08 s 1 -196654.97 4 +174841.63 7570.0 – C57
2020-12-28 22:04:08 S 06 54 14.182 -49 48 32.58 – V C57
2020-12-28 22:04:08 s 1 -196648.09 0 +174139.74 8680.0 – C57
2020-12-28 22:14:08 S 06 54 13.673 -49 48 55.48 – V C57
2020-12-28 22:14:08 s 1 -196639.66 8 +173436.50 7480.0 – C57
2020-12-28 22:24:08 S 06 54 13.246 -49 49 16.79 – V C57
2020-12-28 22:24:08 s 1 -196629.69 9 +172731.91 3960.0 – C57
2020-12-28 22:34:08 S 06 54 12.778 -49 49 39.32 – V C57
2020-12-28 22:34:08 s 1 -196618.17 5 +172025.97 8110.0 – C57
2020-12-28 22:44:08 S 06 54 12.197 -49 50 00.96 – V C57
2020-12-28 22:44:08 s 1 -196605.08 8 +171318.68 9910.0 – C57
2020-12-28 22:54:08 S 06 54 11.614 -49 50 23.50 – V C57
2020-12-28 22:54:08 s 1 -196590.43 0 +170610.03 9350.0 – C57
2020-12-28 23:04:08 S 06 54 11.258 -49 50 46.75 – V C57
2020-12-28 23:04:08 s 1 -196574.19 2 +169900.03 6430.0 – C57
2020-12-28 23:14:08 S 06 54 10.764 -49 51 07.16 – V C57
2020-12-28 23:14:08 s 1 -196556.36 6 +169188.67 1120.0 – C57
2020-12-28 23:24:08 S 06 54 10.188 -49 51 30.10 – V C57
2020-12-28 23:24:08 s 1 -196536.94 3 +168475.95 3420.0 – C57
2020-12-28 23:34:08 S 06 54 09.883 -49 51 51.98 – V C57
2020-12-28 23:34:08 s 1 -196515.91 5 +167761.87 3310.0 – C57
2020-12-28 23:44:08 S 06 54 09.362 -49 52 15.10 – V C57
2020-12-28 23:44:08 s 1 -196493.27 4 +167046.42 780.0 – C57
2020-12-28 23:54:08 S 06 54 08.846 -49 52 36.41 – V C57
2020-12-28 23:54:08 s 1 -196469.01 0 +166329.62 5810.0 – 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)