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
2020-12-20 08:24:08 s 1 +138166.07 1 +270352.00 4280.0 – C57
2020-12-20 08:34:08 S 07 02 43.502 -41 17 43.22 – V C57
2020-12-20 08:34:08 s 1 +137939.32 2 +270897.64 9230.0 – C57
2020-12-20 08:44:08 S 07 02 43.330 -41 18 10.26 – V C57
2020-12-20 08:44:08 s 1 +137711.86 2 +271441.90 3370.0 – C57
2020-12-20 08:54:08 S 07 02 43.325 -41 18 37.01 – V C57
2020-12-20 08:54:08 s 1 +137483.69 7 +271984.79 6720.0 – C57
2020-12-20 09:04:08 S 07 02 42.953 -41 19 04.04 – V C57
2020-12-20 09:04:08 s 1 +137254.82 8 +272526.30 9260.0 – C57
2020-12-20 09:14:08 S 07 02 42.590 -41 19 30.97 – V C57
2020-12-20 09:14:08 s 1 +137025.26 1 +273066.44 1010.0 – C57
2020-12-20 09:24:08 S 07 02 42.329 -41 19 57.94 – V C57
2020-12-20 09:24:08 s 1 +136794.99 9 +273605.22 1980.0 – C57
2020-12-20 09:34:08 S 07 02 42.070 -41 20 24.58 – V C57
2020-12-20 09:34:08 s 1 +136564.04 6 +274142.63 2160.0 – C57
2020-12-20 09:44:08 S 07 02 41.839 -41 20 52.51 – V C57
2020-12-20 09:44:08 s 1 +136332.40 4 +274678.68 1570.0 – C57
2020-12-20 09:54:08 S 07 02 41.662 -41 21 18.00 – V C57
2020-12-20 09:54:08 s 1 +136100.07 9 +275213.36 200.0 – C57
2020-12-20 10:04:08 S 07 02 41.345 -41 21 45.04 – V C57
2020-12-20 10:04:08 s 1 +135867.07 3 +275746.69 8060.0 – C57
2020-12-20 10:14:08 S 07 02 41.035 -41 22 12.43 – V C57
2020-12-20 10:14:08 s 1 +135633.39 0 +276278.67 5150.0 – C57
2020-12-20 10:24:08 S 07 02 40.865 -41 22 39.00 – V C57
2020-12-20 10:24:08 s 1 +135399.03 3 +276809.29 1490.0 – C57
2020-12-20 10:34:08 S 07 02 40.541 -41 23 05.93 – V C57
2020-12-20 10:34:08 s 1 +135164.00 7 +277338.55 7060.0 – C57
2020-12-20 10:44:08 S 07 02 40.308 -41 23 31.31 – V C57
2020-12-20 10:44:08 s 1 +134928.31 5 +277866.47 1890.0 – C57
2020-12-20 10:54:08 S 07 02 40.106 -41 23 59.17 – V C57
2020-12-20 10:54:08 s 1 +134691.96 0 +278393.05 5960.0 – C57
2020-12-20 11:04:08 S 07 02 39.720 -41 24 26.68 – V C57
2020-12-20 11:04:08 s 1 +134454.94 5 +278918.28 9290.0 – C57
2020-12-20 11:14:08 S 07 02 39.504 -41 24 53.60 – V C57
2020-12-20 11:14:08 s 1 +134217.27 5 +279442.16 1880.0 – C57
2020-12-20 11:24:08 S 07 02 39.266 -41 25 18.91 – V C57
2020-12-20 11:24:08 s 1 +133978.95 2 +279964.71 3740.0 – C57
2020-12-20 11:34:08 S 07 02 39.098 -41 25 46.06 – V C57
2020-12-20 11:34:08 s 1 +133739.98 0 +280485.92 4860.0 – C57
2020-12-20 11:44:08 S 07 02 38.950 -41 26 12.41 – V C57
2020-12-20 11:44:08 s 1 +133500.36 3 +281005.79 5250.0 – C57
2020-12-20 11:54:08 S 07 02 38.405 -41 26 39.08 – V C57
2020-12-20 11:54:08 s 1 +133260.10 3 +281524.33 4920.0 – C57
2020-12-20 12:04:08 S 07 02 38.050 -41 27 07.49 – V C57
2020-12-20 12:04:08 s 1 +133019.20 4 +282041.54 3870.0 – C57
2020-12-20 12:14:08 S 07 02 38.102 -41 27 32.72 – V C57
2020-12-20 12:14:08 s 1 +132777.67 0 +282557.42 2110.0 – C57
2020-12-20 12:24:08 S 07 02 37.709 -41 28 00.19 – V C57
2020-12-20 12:24:08 s 1 +132535.50 4 +283071.98 9630.0 – C57
2020-12-20 12:34:08 S 07 02 37.495 -41 28 27.41 – 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)