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
2021-01-15 21:34:08 s 1 +145110.03 6 +196700.65 3940.0 – C57
2021-01-15 21:44:08 S 06 27 07.582 -65 01 18.62 – V C57
2021-01-15 21:44:08 s 1 +144976.16 7 +197435.67 2200.0 – C57
2021-01-15 21:54:08 S 06 27 06.586 -65 01 39.94 – V C57
2021-01-15 21:54:08 s 1 +144840.89 4 +198168.79 8040.0 – C57
2021-01-15 22:04:08 S 06 27 05.842 -65 02 00.06 – V C57
2021-01-15 22:04:08 s 1 +144704.22 7 +198900.01 1490.0 – C57
2021-01-15 22:14:08 S 06 27 04.702 -65 02 20.33 – V C57
2021-01-15 22:14:08 s 1 +144566.17 6 +199629.34 2560.0 – C57
2021-01-15 22:24:08 S 06 27 03.559 -65 02 41.86 – V C57
2021-01-15 22:24:08 s 1 +144426.75 1 +200356.78 1270.0 – C57
2021-01-15 22:34:08 S 06 27 02.611 -65 03 01.84 – V C57
2021-01-15 22:34:08 s 1 +144285.96 1 +201082.33 7630.0 – C57
2021-01-15 22:44:08 S 06 27 01.702 -65 03 23.40 – V C57
2021-01-15 22:44:08 s 1 +144143.81 5 +201806.01 1660.0 – C57
2021-01-15 22:54:08 S 06 27 00.672 -65 03 44.93 – V C57
2021-01-15 22:54:08 s 1 +144000.32 4 +202527.81 3370.0 – C57
2021-01-15 23:04:08 S 06 26 59.731 -65 04 04.98 – V C57
2021-01-15 23:04:08 s 1 +143855.49 5 +203247.75 2790.0 – C57
2021-01-15 23:14:08 S 06 26 58.459 -65 04 24.96 – V C57
2021-01-15 23:14:08 s 1 +143709.33 9 +203965.82 9920.0 – C57
2021-01-15 23:24:08 S 06 26 57.583 -65 04 46.27 – V C57
2021-01-15 23:24:08 s 1 +143561.86 5 +204682.03 4790.0 – C57
2021-01-15 23:34:08 S 06 26 56.681 -65 05 07.69 – V C57
2021-01-15 23:34:08 s 1 +143413.08 2 +205396.38 7400.0 – C57
2021-01-15 23:44:08 S 06 26 55.445 -65 05 28.21 – V C57
2021-01-15 23:44:08 s 1 +143262.99 8 +206108.88 7780.0 – C57
2021-01-15 23:54:08 S 06 26 54.367 -65 05 48.41 – V C57
2021-01-15 23:54:08 s 1 +143111.62 3 +206819.54 5940.0 – C57
2021-01-16 00:04:08 S 06 26 53.748 -65 06 09.72 – V C57
2021-01-16 00:04:08 s 1 +142958.96 6 +207528.35 1890.0 – C57
2021-01-16 00:14:08 S 06 26 52.718 -65 06 31.57 – V C57
2021-01-16 00:14:08 s 1 +142805.03 4 +208235.32 5640.0 – C57
2021-01-16 00:24:08 S 06 26 51.590 -65 06 51.26 – V C57
2021-01-16 00:24:08 s 1 +142649.83 7 +208940.47 7220.0 – C57
2021-01-16 00:34:08 S 06 26 50.570 -65 07 11.39 – V C57
2021-01-16 00:34:08 s 1 +142493.38 4 +209643.78 6640.0 – C57
2021-01-16 00:44:08 S 06 26 49.711 -65 07 32.84 – V C57
2021-01-16 00:44:08 s 1 +142335.68 3 +210345.26 3910.0 – C57
2021-01-16 00:54:08 S 06 26 48.374 -65 07 54.59 – V C57
2021-01-16 00:54:08 s 1 +142176.74 1 +211044.93 9050.0 – C57
2021-01-16 01:04:08 S 06 26 47.453 -65 08 13.88 – V C57
2021-01-16 01:04:08 s 1 +142016.56 9 +211742.78 2060.0 – C57
2021-01-16 01:14:08 S 06 26 46.476 -65 08 34.62 – V C57
2021-01-16 01:14:08 s 1 +141855.17 3 +212438.82 2970.0 – C57
2021-01-16 01:24:08 S 06 26 45.602 -65 08 56.00 – V C57
2021-01-16 01:24:08 s 1 +141692.56 2 +213133.05 1790.0 – C57
2021-01-16 01:34:08 S 06 26 44.498 -65 09 16.34 – V C57
2021-01-16 01:34:08 s 1 +141528.74 5 +213825.48 8530.0 – C57
2021-01-16 01:44:08 S 06 26 43.524 -65 09 36.36 – 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)