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
2021-01-04 09:14:08 S 06 48 01.178 -55 47 13.96 – V C57
2021-01-04 09:14:08 s 1 +83344.816 0 +349963.65 6360.0 – C57
2021-01-04 09:24:08 S 06 48 00.768 -55 47 37.03 – V C57
2021-01-04 09:24:08 s 1 +83031.824 0 +350284.05 3660.0 – C57
2021-01-04 09:34:08 S 06 48 00.034 -55 47 59.82 – V C57
2021-01-04 09:34:08 s 1 +82718.579 0 +350603.37 620.0 – C57
2021-01-04 09:44:08 S 06 47 59.388 -55 48 23.58 – V C57
2021-01-04 09:44:08 s 1 +82405.083 0 +350921.62 7240.0 – C57
2021-01-04 09:54:08 S 06 47 58.858 -55 48 45.79 – V C57
2021-01-04 09:54:08 s 1 +82091.338 0 +351238.80 3530.0 – C57
2021-01-04 10:04:08 S 06 47 58.147 -55 49 07.97 – V C57
2021-01-04 10:04:08 s 1 +81777.344 0 +351554.90 9490.0 – C57
2021-01-04 10:14:08 S 06 47 57.422 -55 49 32.74 – V C57
2021-01-04 10:14:08 s 1 +81463.105 0 +351869.94 5130.0 – C57
2021-01-04 10:24:08 S 06 47 56.654 -55 49 54.88 – V C57
2021-01-04 10:24:08 s 1 +81148.620 0 +352183.91 430.0 – C57
2021-01-04 10:34:08 S 06 47 56.066 -55 50 17.88 – V C57
2021-01-04 10:34:08 s 1 +80833.892 0 +352496.80 5410.0 – C57
2021-01-04 10:44:08 S 06 47 55.270 -55 50 41.28 – V C57
2021-01-04 10:44:08 s 1 +80518.922 0 +352808.63 70.0 – C57
2021-01-04 10:54:08 S 06 47 54.689 -55 51 03.56 – V C57
2021-01-04 10:54:08 s 1 +80203.711 0 +353119.40 4400.0 – C57
2021-01-04 11:14:08 S 06 47 53.306 -55 51 49.86 – V C57
2021-01-04 11:14:08 s 1 +79572.573 0 +353737.73 2110.0 – C57
2021-01-04 11:24:08 S 06 47 52.615 -55 52 12.86 – V C57
2021-01-04 11:24:08 s 1 +79256.648 0 +354045.31 5490.0 – C57
2021-01-04 11:34:08 S 06 47 52.018 -55 52 36.08 – V C57
2021-01-04 11:34:08 s 1 +78940.489 0 +354351.82 8560.0 – C57
2021-01-04 11:44:08 S 06 47 51.274 -55 52 59.95 – V C57
2021-01-04 11:44:08 s 1 +78624.096 0 +354657.27 1320.0 – C57
2021-01-04 11:54:08 S 06 47 50.630 -55 53 23.32 – V C57
2021-01-04 11:54:08 s 1 +78307.471 0 +354961.66 3760.0 – C57
2021-01-04 12:04:08 S 06 47 50.050 -55 53 43.91 – V C57
2021-01-04 12:04:08 s 1 +77990.615 0 +355265.00 5900.0 – C57
2021-01-04 12:14:08 S 06 47 49.265 -55 54 06.41 – V C57
2021-01-04 12:14:08 s 1 +77673.530 0 +355567.28 7740.0 – C57
2021-01-04 12:24:08 S 06 47 48.554 -55 54 30.49 – V C57
2021-01-04 12:24:08 s 1 +77356.217 0 +355868.50 9260.0 – C57
2021-01-04 12:34:08 S 06 47 47.902 -55 54 53.39 – V C57
2021-01-04 12:34:08 s 1 +77038.677 0 +356168.66 490.0 – C57
2021-01-04 12:44:08 S 06 47 47.210 -55 55 16.57 – V C57
2021-01-04 12:44:08 s 1 +76720.912 0 +356467.78 1420.0 – C57
2021-01-04 12:54:08 S 06 47 46.428 -55 55 39.65 – V C57
2021-01-04 12:54:08 s 1 +76402.900 0 +356765.97 2270.0 – C57
2021-01-04 13:04:08 S 06 47 45.826 -55 56 02.90 – V C57
2021-01-04 13:04:08 s 1 +76083.706 0 +357068.35 2130.0 – C57
2021-01-04 13:14:08 S 06 47 45.086 -55 56 25.44 – V C57
2021-01-04 13:14:08 s 1 +75765.326 0 +357364.06 1700.0 – C57
2021-01-04 13:24:08 S 06 47 44.422 -55 56 48.70 – V C57
2021-01-04 13:24:08 s 1 +75446.679 0 +357658.98 1430.0 – 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)