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
2020-12-22 18:44:08 s 1 +33055.671 0 +389524.86 8060.0 – C57
2020-12-22 18:54:08 S 07 00 53.762 -43 51 28.26 – V C57
2020-12-22 18:54:08 s 1 +32715.931 0 +389684.19 2430.0 – C57
2020-12-22 19:04:08 S 07 00 53.534 -43 51 54.32 – V C57
2020-12-22 19:04:08 s 1 +32376.107 0 +389842.59 6860.0 – C57
2020-12-22 19:14:08 S 07 00 53.191 -43 52 20.39 – V C57
2020-12-22 19:14:08 s 1 +32036.200 0 +390000.05 1330.0 – C57
2020-12-22 19:24:08 S 07 00 52.795 -43 52 46.78 – V C57
2020-12-22 19:24:08 s 1 +31696.210 0 +390156.58 5850.0 – C57
2020-12-22 19:34:08 S 07 00 52.382 -43 53 12.91 – V C57
2020-12-22 19:34:08 s 1 +31356.139 0 +390312.18 420.0 – C57
2020-12-22 19:44:08 S 07 00 52.001 -43 53 38.40 – V C57
2020-12-22 19:44:08 s 1 +31015.987 0 +390466.85 5040.0 – C57
2020-12-22 19:54:08 S 07 00 51.679 -43 54 04.03 – V C57
2020-12-22 19:54:08 s 1 +30675.756 0 +390620.59 9700.0 – C57
2020-12-22 20:04:08 S 07 00 51.394 -43 54 29.63 – V C57
2020-12-22 20:04:08 s 1 +30335.446 0 +390773.39 4400.0 – C57
2020-12-22 20:14:08 S 07 00 50.875 -43 54 55.51 – V C57
2020-12-22 20:14:08 s 1 +29995.058 0 +390925.27 9150.0 – C57
2020-12-22 20:24:08 S 07 00 50.530 -43 55 22.04 – V C57
2020-12-22 20:24:08 s 1 +29654.593 0 +391076.22 3940.0 – C57
2020-12-22 20:34:08 S 07 00 50.256 -43 55 46.70 – V C57
2020-12-22 20:34:08 s 1 +29314.052 0 +391226.24 8770.0 – C57
2020-12-22 20:44:08 S 07 00 49.913 -43 56 13.06 – V C57
2020-12-22 20:44:08 s 1 +28973.436 0 +391375.33 3640.0 – C57
2020-12-22 20:54:08 S 07 00 49.447 -43 56 38.36 – V C57
2020-12-22 20:54:08 s 1 +28632.746 0 +391523.50 8550.0 – C57
2020-12-22 21:04:08 S 07 00 48.977 -43 57 04.90 – V C57
2020-12-22 21:04:08 s 1 +28291.982 0 +391670.73 3490.0 – C57
2020-12-22 21:14:08 S 07 00 48.734 -43 57 30.49 – V C57
2020-12-22 21:14:08 s 1 +27951.146 0 +391817.05 8480.0 – C57
2020-12-22 21:24:08 S 07 00 48.367 -43 57 56.81 – V C57
2020-12-22 21:24:08 s 1 +27610.238 0 +391962.43 3490.0 – C57
2020-12-22 21:34:08 S 07 00 48.055 -43 58 22.44 – V C57
2020-12-22 21:34:08 s 1 +27269.260 0 +392106.89 8540.0 – C57
2020-12-22 21:44:08 S 07 00 47.539 -43 58 48.47 – V C57
2020-12-22 21:44:08 s 1 +26928.211 0 +392250.43 3630.0 – C57
2020-12-22 21:54:08 S 07 00 47.266 -43 59 14.03 – V C57
2020-12-22 21:54:08 s 1 +26587.094 0 +392393.04 8750.0 – C57
2020-12-22 22:04:08 S 07 00 46.968 -43 59 38.51 – V C57
2020-12-22 22:04:08 s 1 +26245.908 0 +392534.73 3890.0 – C57
2020-12-22 22:34:08 S 07 00 45.720 -44 00 57.31 – V C57
2020-12-22 22:34:08 s 1 +25221.951 0 +392954.25 9510.0 – C57
2020-12-22 22:44:08 S 07 00 45.377 -44 01 22.87 – V C57
2020-12-22 22:44:08 s 1 +24880.502 0 +393092.24 4760.0 – C57
2020-12-22 22:54:08 S 07 00 44.983 -44 01 49.01 – V C57
2020-12-22 22:54:08 s 1 +24538.988 0 +393229.32 50.0 – C57
2020-12-22 23:04:08 S 07 00 44.568 -44 02 15.07 – V C57
2020-12-22 23:04:08 s 1 +24197.412 0 +393365.47 5360.0 – C57
2020-12-22 23:14:08 S 07 00 44.158 -44 02 40.20 – 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)