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
2021-01-03 10:44:08 S 06 49 28.469 -54 54 40.82 – V C57
2021-01-03 10:44:08 s 1 +122558.64 2 +296274.79 3310.0 – C57
2021-01-03 10:54:08 S 06 49 27.835 -54 55 04.73 – V C57
2021-01-03 10:54:08 s 1 +122296.47 1 +296753.30 9140.0 – C57
2021-01-03 11:04:08 S 06 49 27.420 -54 55 28.99 – V C57
2021-01-03 11:04:08 s 1 +122033.77 1 +297230.54 4260.0 – C57
2021-01-03 11:14:08 S 06 49 26.825 -54 55 51.49 – V C57
2021-01-03 11:14:08 s 1 +121770.54 5 +297706.49 8670.0 – C57
2021-01-03 11:24:08 S 06 49 26.155 -54 56 15.65 – V C57
2021-01-03 11:24:08 s 1 +121506.79 8 +298181.15 2370.0 – C57
2021-01-03 11:34:08 S 06 49 25.486 -54 56 39.12 – V C57
2021-01-03 11:34:08 s 1 +121242.53 0 +298654.54 5360.0 – C57
2021-01-03 13:24:08 S 06 49 18.770 -55 00 59.54 – V C57
2021-01-03 13:24:08 s 1 +118301.86 5 +303778.34 2430.0 – C57
2021-01-03 13:34:08 S 06 49 18.149 -55 01 22.69 – V C57
2021-01-03 13:34:08 s 1 +118031.57 1 +304236.54 7240.0 – C57
2021-01-03 13:44:08 S 06 49 17.429 -55 01 47.35 – V C57
2021-01-03 13:44:08 s 1 +117760.79 3 +304693.48 1400.0 – C57
2021-01-03 13:54:08 S 06 49 16.867 -55 02 10.36 – V C57
2021-01-03 13:54:08 s 1 +117489.53 2 +305149.18 4900.0 – C57
2021-01-03 14:04:08 S 06 49 16.272 -55 02 33.61 – V C57
2021-01-03 14:04:08 s 1 +117217.79 2 +305603.62 7750.0 – C57
2021-01-03 14:14:08 S 06 49 15.574 -55 02 57.62 – V C57
2021-01-03 14:14:08 s 1 +116945.57 4 +306056.81 9960.0 – C57
2021-01-03 14:24:08 S 06 49 15.041 -55 03 20.88 – V C57
2021-01-03 14:24:08 s 1 +116672.88 2 +306508.76 1520.0 – C57
2021-01-03 14:34:08 S 06 49 14.424 -55 03 44.03 – V C57
2021-01-03 14:34:08 s 1 +116399.71 7 +306959.47 2440.0 – C57
2021-01-03 14:44:08 S 06 49 13.682 -55 04 08.47 – V C57
2021-01-03 14:44:08 s 1 +116126.08 3 +307408.93 2730.0 – C57
2021-01-03 14:54:08 S 06 49 13.061 -55 04 32.05 – V C57
2021-01-03 14:54:08 s 1 +115851.98 1 +307857.15 2380.0 – C57
2021-01-03 15:04:08 S 06 49 12.490 -55 04 54.73 – V C57
2021-01-03 15:04:08 s 1 +115577.41 5 +308304.14 1410.0 – C57
2021-01-03 15:14:08 S 06 49 11.813 -55 05 19.79 – V C57
2021-01-03 15:14:08 s 1 +115302.38 7 +308749.88 9810.0 – C57
2021-01-03 15:24:08 S 06 49 11.198 -55 05 43.04 – V C57
2021-01-03 15:24:08 s 1 +115026.89 9 +309194.39 7580.0 – C57
2021-01-03 15:34:08 S 06 49 10.663 -55 06 05.62 – V C57
2021-01-03 15:34:08 s 1 +114750.95 3 +309637.67 4740.0 – C57
2021-01-03 15:44:08 S 06 49 09.895 -55 06 28.98 – V C57
2021-01-03 15:44:08 s 1 +114474.55 3 +310079.72 1280.0 – C57
2021-01-03 15:54:08 S 06 49 09.151 -55 06 51.98 – V C57
2021-01-03 15:54:08 s 1 +114197.70 1 +310520.54 7210.0 – C57
2021-01-03 16:04:08 S 06 49 08.834 -55 07 16.54 – V C57
2021-01-03 16:04:08 s 1 +113920.39 8 +310960.13 2530.0 – C57
2021-01-03 16:14:08 S 06 49 08.110 -55 07 38.64 – V C57
2021-01-03 16:14:08 s 1 +113642.64 8 +311398.49 7240.0 – C57
2021-01-03 16:24:08 S 06 49 07.260 -55 08 02.62 – V C57
2021-01-03 16:24:08 s 1 +113364.45 2 +311835.63 1350.0 – 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)