IAA RAS IAA SBSS Data Base

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
2021-01-18 06:34:08 s 1 +54418.332 0 +359376.04 7560.0 – C57
2021-01-18 06:44:08 S 06 20 38.047 -66 54 48.89 – V C57
2021-01-18 06:44:08 s 1 +54084.669 0 +359636.48 7680.0 – C57
2021-01-18 06:54:08 S 06 20 37.207 -66 55 08.22 – V C57
2021-01-18 06:54:08 s 1 +53750.833 0 +359895.86 7470.0 – C57
2021-01-18 07:04:08 S 06 20 35.926 -66 55 28.42 – V C57
2021-01-18 07:04:08 s 1 +53416.824 0 +360154.16 6950.0 – C57
2021-01-18 07:14:08 S 06 20 34.483 -66 55 46.60 – V C57
2021-01-18 07:14:08 s 1 +53082.645 0 +360411.38 6120.0 – C57
2021-01-18 07:24:08 S 06 20 33.026 -66 56 04.27 – V C57
2021-01-18 07:24:08 s 1 +52748.295 0 +360667.54 4970.0 – C57
2021-01-18 07:34:08 S 06 20 31.711 -66 56 23.82 – V C57
2021-01-18 07:34:08 s 1 +52413.778 0 +360922.63 3520.0 – C57
2021-01-18 07:44:08 S 06 20 30.665 -66 56 43.19 – V C57
2021-01-18 07:44:08 s 1 +52079.093 0 +361176.65 1760.0 – C57
2021-01-18 07:54:08 S 06 20 29.594 -66 57 02.12 – V C57
2021-01-18 07:54:08 s 1 +51744.242 0 +361429.61 9700.0 – C57
2021-01-18 08:04:08 S 06 20 28.126 -66 57 21.89 – V C57
2021-01-18 08:04:08 s 1 +51409.226 0 +361681.50 7330.0 – C57
2021-01-18 08:14:08 S 06 20 26.892 -66 57 41.08 – V C57
2021-01-18 08:14:08 s 1 +51074.047 0 +361932.32 4670.0 – C57
2021-01-18 08:24:08 S 06 20 25.433 -66 57 59.04 – V C57
2021-01-18 08:24:08 s 1 +50738.706 0 +362182.08 1700.0 – C57
2021-01-18 08:34:08 S 06 20 24.319 -66 58 18.41 – V C57
2021-01-18 08:34:08 s 1 +50403.204 0 +362430.77 8440.0 – C57
2021-01-18 08:44:08 S 06 20 23.242 -66 58 37.99 – V C57
2021-01-18 08:44:08 s 1 +50067.541 0 +362678.41 4890.0 – C57
2021-01-18 08:54:08 S 06 20 21.926 -66 58 57.36 – V C57
2021-01-18 08:54:08 s 1 +49731.721 0 +362924.98 1050.0 – C57
2021-01-18 09:04:08 S 06 20 20.534 -66 59 16.55 – V C57
2021-01-18 09:04:08 s 1 +49395.742 0 +363170.49 6910.0 – C57
2021-01-18 09:14:08 S 06 20 19.207 -66 59 33.00 – V C57
2021-01-18 09:14:08 s 1 +49059.608 0 +363414.95 2490.0 – C57
2021-01-18 09:24:08 S 06 20 17.976 -66 59 52.62 – V C57
2021-01-18 09:24:08 s 1 +48723.319 0 +363658.34 7780.0 – C57
2021-01-18 09:34:08 S 06 20 16.817 -67 00 12.10 – V C57
2021-01-18 09:34:08 s 1 +48386.876 0 +363900.68 2790.0 – C57
2021-01-18 09:44:08 S 06 20 15.691 -67 00 31.50 – V C57
2021-01-18 09:44:08 s 1 +48050.280 0 +364141.97 7520.0 – C57
2021-01-18 09:54:08 S 06 20 14.357 -67 00 50.08 – V C57
2021-01-18 09:54:08 s 1 +47713.534 0 +364382.19 1970.0 – C57
2021-01-18 10:04:08 S 06 20 12.742 -67 01 09.34 – V C57
2021-01-18 10:04:08 s 1 +47376.637 0 +364621.37 6140.0 – C57
2021-01-18 10:14:08 S 06 20 11.417 -67 01 27.66 – V C57
2021-01-18 10:14:08 s 1 +47039.591 0 +364859.49 40.0 – C57
2021-01-18 10:24:08 S 06 20 10.404 -67 01 47.42 – V C57
2021-01-18 10:24:08 s 1 +46702.397 0 +365096.55 3670.0 – C57
2021-01-18 10:34:08 S 06 20 09.173 -67 02 06.72 – V C57
2021-01-18 10:34:08 s 1 +46365.057 0 +365332.57 7020.0 – C57
2021-01-18 10:44:08 S 06 20 07.800 -67 02 25.73 – 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)