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
2018-12-04 03:14:39 S 04 02 19.150 -08 50 22.09 – V C57
2018-12-04 03:44:39 S 04 02 16.510 -08 51 05.15 – V C57
2018-12-04 04:14:39 S 04 02 13.987 -08 51 46.55 – V C57
2018-12-04 04:44:39 S 04 02 11.436 -08 52 28.56 – V C57
2018-12-04 04:44:39 s 1 -10865.121 0 +378718.33 6770.0 – C57
2018-12-04 05:14:39 S 04 02 08.959 -08 53 08.45 – V C57
2018-12-04 05:14:39 s 1 -11861.734 0 +379006.66 8430.0 – C57
2018-12-04 05:44:39 S 04 02 06.288 -08 53 50.39 – V C57
2018-12-04 05:44:39 s 1 -12857.954 0 +379286.25 1480.0 – C57
2018-12-04 06:14:39 S 04 02 03.804 -08 54 32.72 – V C57
2018-12-04 06:14:39 s 1 -13853.758 0 +379557.12 6080.0 – C57
2018-12-04 06:44:39 S 04 02 01.200 -08 55 15.46 – V C57
2018-12-04 06:44:39 s 1 -14849.124 0 +379819.27 2370.0 – C57
2018-12-04 07:14:39 S 04 01 58.687 -08 55 56.75 – V C57
2018-12-04 07:14:39 s 1 -15844.029 0 +380072.72 500.0 – C57
2018-12-04 07:44:39 S 04 01 56.093 -08 56 37.86 – V C57
2018-12-04 07:44:39 s 1 -16838.452 0 +380317.48 620.0 – C57
2018-12-04 08:14:39 S 04 01 53.537 -08 57 20.63 – V C57
2018-12-04 08:14:39 s 1 -17832.370 0 +380553.56 2860.0 – C57
2018-12-04 08:44:39 S 04 01 51.055 -08 58 01.13 – V C57
2018-12-04 08:44:39 s 1 -18825.761 0 +380780.97 7380.0 – C57
2018-12-04 09:14:39 S 04 01 48.406 -08 58 43.14 – V C57
2018-12-04 09:14:39 s 1 -19818.603 0 +380999.72 4320.0 – C57
2018-12-04 09:44:39 S 04 01 45.907 -08 59 25.48 – V C57
2018-12-04 09:44:39 s 1 -20810.874 0 +381209.82 3820.0 – C57
2018-12-04 09:56:37 C 04 02 15.89 -08 56 40.3 – U T08
2018-12-04 10:08:21 C 04 02 14.91 -08 56 57.0 – U T08
2018-12-04 10:13:09 C 04 02 14.49 -08 57 03.7 – U T08
2018-12-04 10:14:39 S 04 01 43.342 -09 00 05.44 – V C57
2018-12-04 10:14:39 s 1 -21802.552 0 +381411.27 6030.0 – C57
2018-12-04 10:19:59 C 04 02 13.93 -08 57 13.7 – U T08
2018-12-04 10:24:48 C 04 02 13.52 -08 57 20.5 – U T08
2018-12-04 10:31:37 C 04 02 12.95 -08 57 30.3 – U T08
2018-12-04 10:44:39 S 04 01 40.709 -09 00 47.34 – V C57
2018-12-04 10:44:39 s 1 -22793.616 0 +381604.10 1080.0 – C57
2018-12-04 11:14:39 S 04 01 38.146 -09 01 29.28 – V C57
2018-12-04 11:14:39 s 1 -23784.043 0 +381788.31 9130.0 – C57
2018-12-04 11:44:39 S 04 01 35.683 -09 02 11.11 – V C57
2018-12-04 11:44:39 s 1 -24773.813 0 +381963.90 300.0 – C57
2018-12-04 12:14:39 S 04 01 33.101 -09 02 53.59 – V C57
2018-12-04 12:14:39 s 1 -25762.903 0 +382130.89 4750.0 – C57
2018-12-04 12:44:39 S 04 01 30.530 -09 03 33.91 – V C57
2018-12-04 12:44:39 s 1 -26751.292 0 +382289.29 2600.0 – C57
2018-12-04 13:14:39 S 04 01 27.967 -09 04 15.67 – V C57
2018-12-04 13:14:39 s 1 -27738.959 0 +382439.10 4010.0 – C57
2018-12-04 13:44:39 S 04 01 25.483 -09 04 56.03 – V C57
2018-12-04 13:44:39 s 1 -28725.882 0 +382580.33 9110.0 – C57
2018-12-04 14:14:39 S 04 01 22.903 -09 05 37.32 – V C57
2018-12-04 14:14:39 s 1 -29712.040 0 +382713.00 8030.0 – C57
2018-12-04 14:44:39 S 04 01 20.302 -09 06 19.48 – 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)