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
2020-12-29 04:14:08 S 06 53 56.429 -50 02 08.52 – V C57
2020-12-29 04:14:08 s 1 -195238.49 5 +147208.15 7180.0 – C57
2020-12-29 04:24:08 S 06 53 55.788 -50 02 31.63 – V C57
2020-12-29 04:24:08 s 1 -195166.87 1 +146453.87 1170.0 – C57
2020-12-29 04:34:08 S 06 53 55.301 -50 02 53.66 – V C57
2020-12-29 04:34:08 s 1 -195093.35 0 +145698.19 2320.0 – C57
2020-12-29 04:44:08 S 06 53 54.905 -50 03 14.83 – V C57
2020-12-29 04:44:08 s 1 -195017.92 1 +144941.09 600.0 – C57
2020-12-29 04:54:08 S 06 53 54.444 -50 03 37.19 – V C57
2020-12-29 04:54:08 s 1 -194940.57 4 +144182.58 6000.0 – C57
2020-12-29 05:04:08 S 06 53 53.880 -50 04 00.26 – V C57
2020-12-29 05:04:08 s 1 -194861.29 6 +143422.65 8510.0 – C57
2020-12-29 05:14:08 S 06 53 53.443 -50 04 22.15 – V C57
2020-12-29 05:14:08 s 1 -194780.07 7 +142661.31 8110.0 – C57
2020-12-29 05:24:08 S 06 53 52.891 -50 04 43.36 – V C57
2020-12-29 05:24:08 s 1 -194696.90 4 +141898.55 4780.0 – C57
2020-12-29 05:34:08 S 06 53 52.351 -50 05 05.24 – V C57
2020-12-29 05:34:08 s 1 -194611.76 7 +141134.38 8500.0 – C57
2020-12-29 05:44:08 S 06 53 52.085 -50 05 27.20 – V C57
2020-12-29 05:44:08 s 1 -194524.65 4 +140368.78 9250.0 – C57
2020-12-29 05:54:08 S 06 53 51.396 -50 05 49.09 – V C57
2020-12-29 05:54:08 s 1 -194435.55 3 +139601.76 7030.0 – C57
2020-12-29 06:04:08 S 06 53 51.012 -50 06 11.48 – V C57
2020-12-29 06:04:08 s 1 -194344.45 3 +138833.32 1800.0 – C57
2020-12-29 06:14:08 S 06 53 50.582 -50 06 32.80 – V C57
2020-12-29 06:14:08 s 1 -194251.34 0 +138063.46 3560.0 – C57
2020-12-29 06:24:08 S 06 53 50.136 -50 06 54.32 – V C57
2020-12-29 06:24:08 s 1 -194156.20 4 +137292.17 2280.0 – C57
2020-12-29 06:34:08 S 06 53 49.582 -50 07 16.43 – V C57
2020-12-29 06:34:08 s 1 -194059.03 2 +136519.45 7950.0 – C57
2020-12-29 06:44:08 S 06 53 49.114 -50 07 38.64 – V C57
2020-12-29 06:44:08 s 1 -193959.81 2 +135745.31 550.0 – C57
2020-12-29 06:54:08 S 06 53 48.694 -50 08 00.53 – V C57
2020-12-29 06:54:08 s 1 -193858.53 1 +134969.73 50.0 – C57
2020-12-29 07:04:08 S 06 53 48.269 -50 08 21.26 – V C57
2020-12-29 07:04:08 s 1 -193755.17 7 +134192.73 6450.0 – C57
2020-12-29 07:14:08 S 06 53 47.700 -50 08 44.63 – V C57
2020-12-29 07:14:08 s 1 -193649.73 7 +133414.29 9720.0 – C57
2020-12-29 07:24:08 S 06 53 47.227 -50 09 05.83 – V C57
2020-12-29 07:24:08 s 1 -193542.19 9 +132634.43 9840.0 – C57
2020-12-29 07:34:08 S 06 53 46.774 -50 09 27.54 – V C57
2020-12-29 07:34:08 s 1 -193432.54 9 +131853.12 6800.0 – C57
2020-12-29 07:44:08 S 06 53 46.301 -50 09 49.54 – V C57
2020-12-29 07:44:08 s 1 -193320.77 6 +131070.38 570.0 – C57
2020-12-29 07:54:08 S 06 53 45.854 -50 10 10.60 – V C57
2020-12-29 07:54:08 s 1 -193206.86 5 +130286.21 1130.0 – C57
2020-12-29 08:14:08 S 06 53 44.755 -50 10 55.24 – V C57
2020-12-29 08:14:08 s 1 -192972.57 8 +128713.54 2560.0 – C57
2020-12-29 08:24:08 S 06 53 44.304 -50 11 16.19 – V C57
2020-12-29 08:24:08 s 1 -192852.17 5 +127925.05 3390.0 – 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)