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
2018-11-19 20:14:39 s 1 +35593.730 0 +349846.18 8360.0 – C57
2018-11-19 20:44:39 S 04 28 10.841 -00 09 37.73 – V C57
2018-11-19 20:44:39 s 1 +34559.676 0 +350558.51 8460.0 – C57
2018-11-19 21:14:39 S 04 28 08.731 -00 10 21.86 – V C57
2018-11-19 21:14:39 s 1 +33524.684 0 +351260.94 680.0 – C57
2018-11-19 21:44:39 S 04 28 06.607 -00 11 06.65 – V C57
2018-11-19 21:44:39 s 1 +32488.785 0 +351953.51 5260.0 – C57
2018-11-19 22:14:39 S 04 28 04.375 -00 11 51.29 – V C57
2018-11-19 22:14:39 s 1 +31452.013 0 +352636.22 2410.0 – C57
2018-11-19 22:44:39 S 04 28 02.232 -00 12 36.68 – V C57
2018-11-19 22:44:39 s 1 +30414.401 0 +353309.10 2340.0 – C57
2018-11-19 23:14:39 S 04 28 00.007 -00 13 23.41 – V C57
2018-11-19 23:14:39 s 1 +29375.982 0 +353972.16 5270.0 – C57
2018-11-19 23:44:39 S 04 27 57.898 -00 14 07.91 – V C57
2018-11-19 23:44:39 s 1 +28336.787 0 +354625.44 1420.0 – C57
2018-11-20 00:14:39 S 04 27 55.766 -00 14 53.20 – V C57
2018-11-20 00:14:39 s 1 +27296.850 0 +355268.94 980.0 – C57
2018-11-20 00:44:39 S 04 27 53.630 -00 15 38.48 – V C57
2018-11-20 00:44:39 s 1 +26256.201 0 +355902.69 4180.0 – C57
2018-11-20 01:14:39 S 04 27 51.444 -00 16 22.12 – V C57
2018-11-20 01:14:39 s 1 +25214.873 0 +356526.71 1220.0 – C57
2018-11-20 01:44:39 S 04 27 49.152 -00 17 08.66 – V C57
2018-11-20 01:44:39 s 1 +24172.897 0 +357141.01 2290.0 – C57
2018-11-20 02:14:39 S 04 27 47.028 -00 17 54.20 – V C57
2018-11-20 02:14:39 s 1 +23130.304 0 +357745.62 7620.0 – C57
2018-11-20 03:44:39 S 04 27 40.819 -00 20 02.62 – V C57
2018-11-20 03:44:39 s 1 +19999.131 0 +359501.44 1080.0 – C57
2018-11-20 04:14:39 S 04 27 38.381 -00 20 54.31 – V C57
2018-11-20 04:14:39 s 1 +18954.377 0 +360067.45 5390.0 – C57
2018-11-20 04:44:39 S 04 27 36.223 -00 21 39.78 – V C57
2018-11-20 04:44:39 s 1 +17909.158 0 +360623.85 4940.0 – C57
2018-11-20 05:14:39 S 04 27 34.099 -00 22 23.30 – V C57
2018-11-20 05:14:39 s 1 +16863.504 0 +361170.66 9920.0 – C57
2018-11-20 05:44:39 S 04 27 31.865 -00 23 09.42 – V C57
2018-11-20 05:44:39 s 1 +15817.445 0 +361707.89 530.0 – C57
2018-11-20 06:14:39 S 04 27 29.707 -00 23 54.28 – V C57
2018-11-20 06:14:39 s 1 +14771.010 0 +362235.57 6960.0 – C57
2018-11-20 06:44:39 S 04 27 27.578 -00 24 39.74 – V C57
2018-11-20 06:44:39 s 1 +13724.229 0 +362753.72 9400.0 – C57
2018-11-20 07:14:39 S 04 27 25.387 -00 25 25.43 – V C57
2018-11-20 07:14:39 s 1 +12677.130 0 +363262.34 8030.0 – C57
2018-11-20 07:44:39 S 04 27 23.191 -00 26 10.10 – V C57
2018-11-20 07:44:39 s 1 +11629.742 0 +363761.45 3040.0 – C57
2018-11-20 08:14:39 S 04 27 21.127 -00 26 54.31 – V C57
2018-11-20 08:14:39 s 1 +10582.095 0 +364251.08 4630.0 – C57
2018-11-20 08:44:39 S 04 27 18.926 -00 27 38.20 – V C57
2018-11-20 09:14:39 S 04 27 16.733 -00 28 24.38 – V C57
2018-11-20 09:44:39 S 04 27 14.530 -00 29 11.04 – V C57
2018-11-20 10:14:39 S 04 27 12.343 -00 29 55.79 – V C57
2018-11-20 10:44:39 S 04 27 10.224 -00 30 40.10 – 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)