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
2020-12-27 14:44:08 S 06 55 47.299 -48 37 12.61 – V C57
2020-12-27 14:44:08 s 1 -177480.91 3 +284221.89 5180.0 – C57
2020-12-27 14:54:08 S 06 55 46.726 -48 37 35.94 – V C57
2020-12-27 14:54:08 s 1 -177666.04 0 +283744.09 4610.0 – C57
2020-12-27 15:04:08 S 06 55 46.174 -48 38 00.49 – V C57
2020-12-27 15:04:08 s 1 -177850.48 5 +283265.23 3010.0 – C57
2020-12-27 15:14:08 S 06 55 45.739 -48 38 23.21 – V C57
2020-12-27 15:14:08 s 1 -178034.24 5 +282785.29 380.0 – C57
2020-12-27 15:24:08 S 06 55 45.187 -48 38 45.89 – V C57
2020-12-27 15:24:08 s 1 -178217.31 8 +282304.27 6710.0 – C57
2020-12-27 15:34:08 S 06 55 44.736 -48 39 10.58 – V C57
2020-12-27 15:34:08 s 1 -178399.70 1 +281822.18 2000.0 – C57
2020-12-27 15:44:08 S 06 55 44.278 -48 39 33.12 – V C57
2020-12-27 15:44:08 s 1 -178581.39 1 +281339.01 6250.0 – C57
2020-12-27 15:54:08 S 06 55 43.738 -48 39 56.70 – V C57
2020-12-27 15:54:08 s 1 -178762.38 6 +280854.76 9450.0 – C57
2020-12-27 16:04:08 S 06 55 43.330 -48 40 19.67 – V C57
2020-12-27 16:04:08 s 1 -178942.68 3 +280369.43 1590.0 – C57
2020-12-27 16:14:08 S 06 55 42.780 -48 40 42.49 – V C57
2020-12-27 16:14:08 s 1 -179122.28 0 +279883.02 2690.0 – C57
2020-12-27 16:24:08 S 06 55 42.247 -48 41 06.72 – V C57
2020-12-27 16:24:08 s 1 -179301.17 3 +279395.53 2720.0 – C57
2020-12-27 16:34:08 S 06 55 41.719 -48 41 29.18 – V C57
2020-12-27 16:34:08 s 1 -179479.36 1 +278906.96 1690.0 – C57
2020-12-27 16:44:08 S 06 55 41.369 -48 41 52.80 – V C57
2020-12-27 16:44:08 s 1 -179656.84 0 +278417.31 9590.0 – C57
2020-12-27 16:54:08 S 06 55 40.870 -48 42 15.59 – V C57
2020-12-27 16:54:08 s 1 -179833.60 8 +277926.56 6420.0 – C57
2020-12-27 17:04:08 S 06 55 40.349 -48 42 38.45 – V C57
2020-12-27 17:04:08 s 1 -180009.66 3 +277434.74 2180.0 – C57
2020-12-27 17:14:08 S 06 55 39.888 -48 43 01.16 – V C57
2020-12-27 17:14:08 s 1 -180185.00 0 +276941.82 6850.0 – C57
2020-12-27 17:24:08 S 06 55 39.403 -48 43 25.21 – V C57
2020-12-27 17:24:08 s 1 -180359.61 9 +276447.82 450.0 – C57
2020-12-27 17:34:08 S 06 55 38.839 -48 43 47.78 – V C57
2020-12-27 17:34:08 s 1 -180533.51 6 +275952.72 2950.0 – C57
2020-12-27 17:44:08 S 06 55 38.220 -48 44 10.14 – V C57
2020-12-27 17:44:08 s 1 -180706.68 7 +275456.54 4370.0 – C57
2020-12-27 17:54:08 S 06 55 37.994 -48 44 35.16 – V C57
2020-12-27 17:54:08 s 1 -180879.13 2 +274959.26 4680.0 – C57
2020-12-27 18:04:08 S 06 55 37.286 -48 44 58.52 – V C57
2020-12-27 18:04:08 s 1 -181050.84 6 +274460.89 3900.0 – C57
2020-12-27 18:14:08 S 06 55 36.890 -48 45 20.99 – V C57
2020-12-27 18:14:08 s 1 -181221.82 6 +273961.43 2020.0 – C57
2020-12-27 18:24:08 S 06 55 36.259 -48 45 44.17 – V C57
2020-12-27 18:24:08 s 1 -181392.07 1 +273460.87 9020.0 – C57
2020-12-27 18:34:08 S 06 55 35.866 -48 46 07.68 – V C57
2020-12-27 18:34:08 s 1 -181561.57 8 +272959.21 4920.0 – C57
2020-12-27 18:44:08 S 06 55 35.366 -48 46 30.50 – V C57
2020-12-27 18:44:08 s 1 -181730.34 2 +272456.46 9700.0 – 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)