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
2021-01-31 02:34:07 s 1 +80001.803 0 +335174.84 8810.0 – C57
2021-01-31 02:44:07 S 05 31 16.853 -75 35 44.23 – V C57
2021-01-31 02:44:07 s 1 +79678.592 0 +335515.50 2820.0 – C57
2021-01-31 02:54:07 S 05 31 14.206 -75 36 01.04 – V C57
2021-01-31 02:54:07 s 1 +79355.104 0 +335854.98 6270.0 – C57
2021-01-31 03:04:07 S 05 31 11.441 -75 36 17.82 – V C57
2021-01-31 03:04:07 s 1 +79031.338 0 +336193.29 9180.0 – C57
2021-01-31 03:14:07 S 05 31 08.657 -75 36 34.92 – V C57
2021-01-31 03:14:07 s 1 +78707.297 0 +336530.43 1540.0 – C57
2021-01-31 03:24:07 S 05 31 05.854 -75 36 51.95 – V C57
2021-01-31 03:24:07 s 1 +78382.983 0 +336866.39 3360.0 – C57
2021-01-31 03:34:07 S 05 31 03.161 -75 37 08.69 – V C57
2021-01-31 03:34:07 s 1 +78058.398 0 +337201.18 4650.0 – C57
2021-01-31 03:44:07 S 05 31 00.468 -75 37 25.57 – V C57
2021-01-31 03:44:07 s 1 +77733.542 0 +337534.81 5400.0 – C57
2021-01-31 03:54:07 S 05 30 57.588 -75 37 41.38 – V C57
2021-01-31 03:54:07 s 1 +77408.418 0 +337867.26 5620.0 – C57
2021-01-31 04:04:07 S 05 30 54.622 -75 37 58.15 – V C57
2021-01-31 04:04:07 s 1 +77083.028 0 +338198.55 5300.0 – C57
2021-01-31 04:14:07 S 05 30 51.857 -75 38 14.10 – V C57
2021-01-31 04:14:07 s 1 +76757.373 0 +338528.67 4470.0 – C57
2021-01-31 04:24:07 S 05 30 49.471 -75 38 31.88 – V C57
2021-01-31 04:24:07 s 1 +76431.455 0 +338857.62 3110.0 – C57
2021-01-31 04:34:07 S 05 30 46.303 -75 38 49.02 – V C57
2021-01-31 04:34:07 s 1 +76105.275 0 +339185.42 1230.0 – C57
2021-01-31 04:44:07 S 05 30 43.769 -75 39 05.69 – V C57
2021-01-31 04:44:07 s 1 +75778.836 0 +339512.05 8840.0 – C57
2021-01-31 04:54:07 S 05 30 40.697 -75 39 22.10 – V C57
2021-01-31 04:54:07 s 1 +75452.138 0 +339837.52 5930.0 – C57
2021-01-31 05:04:07 S 05 30 38.062 -75 39 39.67 – V C57
2021-01-31 05:04:07 s 1 +75125.185 0 +340161.83 2510.0 – C57
2021-01-31 05:14:07 S 05 30 34.666 -75 39 57.10 – V C57
2021-01-31 05:14:07 s 1 +74797.976 0 +340484.99 8580.0 – C57
2021-01-31 05:24:07 S 05 30 32.369 -75 40 12.32 – V C57
2021-01-31 05:24:07 s 1 +74470.514 0 +340806.99 4150.0 – C57
2021-01-31 05:34:07 S 05 30 29.911 -75 40 29.06 – V C57
2021-01-31 05:34:07 s 1 +74142.801 0 +341127.83 9220.0 – C57
2021-01-31 05:44:07 S 05 30 27.014 -75 40 47.10 – V C57
2021-01-31 05:44:07 s 1 +73814.838 0 +341447.52 3780.0 – C57
2021-01-31 05:54:07 S 05 30 24.247 -75 41 02.76 – V C57
2021-01-31 05:54:07 s 1 +73486.626 0 +341766.06 7860.0 – C57
2021-01-31 06:04:07 S 05 30 21.473 -75 41 20.40 – V C57
2021-01-31 06:04:07 s 1 +73158.168 0 +342083.45 1430.0 – C57
2021-01-31 06:14:07 S 05 30 18.734 -75 41 36.28 – V C57
2021-01-31 06:14:07 s 1 +72829.465 0 +342399.68 4520.0 – C57
2021-01-31 06:24:07 S 05 30 15.545 -75 41 53.52 – V C57
2021-01-31 06:24:07 s 1 +72500.519 0 +342714.77 7120.0 – C57
2021-01-31 06:34:07 S 05 30 13.094 -75 42 09.79 – V C57
2021-01-31 06:34:07 s 1 +72171.331 0 +343028.71 9240.0 – C57
2021-01-31 06:44:07 S 05 30 10.454 -75 42 26.96 – 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)