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 18:54:08 S 06 55 34.747 -48 46 53.72 – V C57
2020-12-27 18:54:08 s 1 -181898.36 2 +271952.60 3360.0 – C57
2020-12-27 19:04:08 S 06 55 34.248 -48 47 17.23 – V C57
2020-12-27 19:04:08 s 1 -182065.63 5 +271447.65 5890.0 – C57
2020-12-27 19:14:08 S 06 55 33.818 -48 47 39.77 – V C57
2020-12-27 19:14:08 s 1 -182232.15 8 +270941.60 7290.0 – C57
2020-12-27 19:24:08 S 06 55 33.391 -48 48 02.45 – V C57
2020-12-27 19:24:08 s 1 -182397.92 8 +270434.44 7560.0 – C57
2020-12-27 19:34:08 S 06 55 32.842 -48 48 25.60 – V C57
2020-12-27 19:34:08 s 1 -182562.94 1 +269926.18 6700.0 – C57
2020-12-27 19:44:08 S 06 55 32.227 -48 48 49.10 – V C57
2020-12-27 19:44:08 s 1 -182727.19 6 +269416.81 4690.0 – C57
2020-12-27 19:54:08 S 06 55 31.894 -48 49 12.90 – V C57
2020-12-27 19:54:08 s 1 -182890.68 9 +268906.34 1530.0 – C57
2020-12-27 20:04:08 S 06 55 31.447 -48 49 36.34 – V C57
2020-12-27 20:04:08 s 1 -183053.41 7 +268394.76 7220.0 – C57
2020-12-27 20:14:08 S 06 55 30.842 -48 49 58.30 – V C57
2020-12-27 20:14:08 s 1 -183215.37 7 +267882.07 1760.0 – C57
2020-12-27 20:24:08 S 06 55 30.346 -48 50 22.13 – V C57
2020-12-27 20:24:08 s 1 -183376.56 7 +267368.27 5140.0 – C57
2020-12-27 20:34:08 S 06 55 29.868 -48 50 45.42 – V C57
2020-12-27 20:34:08 s 1 -183536.98 3 +266853.36 7360.0 – C57
2020-12-27 20:44:08 S 06 55 29.407 -48 51 07.09 – V C57
2020-12-27 20:44:08 s 1 -183696.62 2 +266337.34 8400.0 – C57
2020-12-27 20:54:08 S 06 55 28.896 -48 51 30.42 – V C57
2020-12-27 20:54:08 s 1 -183855.48 1 +265820.20 8280.0 – C57
2020-12-27 21:04:08 S 06 55 28.294 -48 51 55.12 – V C57
2020-12-27 21:04:08 s 1 -184013.55 7 +265301.95 6970.0 – C57
2020-12-27 21:14:08 S 06 55 27.888 -48 52 17.69 – V C57
2020-12-27 21:14:08 s 1 -184170.84 7 +264782.59 4480.0 – C57
2020-12-27 21:24:08 S 06 55 27.370 -48 52 40.87 – V C57
2020-12-27 21:24:08 s 1 -184327.34 8 +264262.10 810.0 – C57
2020-12-27 21:34:08 S 06 55 26.887 -48 53 02.83 – V C57
2020-12-27 21:34:08 s 1 -184483.05 7 +263740.50 5950.0 – C57
2020-12-27 21:44:08 S 06 55 26.328 -48 53 25.48 – V C57
2020-12-27 21:44:08 s 1 -184637.97 1 +263217.78 9890.0 – C57
2020-12-27 21:54:08 S 06 55 25.783 -48 53 48.55 – V C57
2020-12-27 21:54:08 s 1 -184792.08 7 +262693.93 2630.0 – C57
2020-12-27 22:04:08 S 06 55 25.502 -48 54 11.84 – V C57
2020-12-27 22:04:08 s 1 -184945.40 0 +262168.97 4160.0 – C57
2020-12-27 22:14:08 S 06 55 24.900 -48 54 35.06 – V C57
2020-12-27 22:14:08 s 1 -185097.91 0 +261642.88 4480.0 – C57
2020-12-27 22:24:08 S 06 55 24.288 -48 54 57.96 – V C57
2020-12-27 22:24:08 s 1 -185249.61 1 +261115.66 3590.0 – C57
2020-12-27 22:34:08 S 06 55 23.866 -48 55 20.96 – V C57
2020-12-27 22:34:08 s 1 -185400.50 1 +260587.32 1480.0 – C57
2020-12-27 22:44:08 S 06 55 23.426 -48 55 44.22 – V C57
2020-12-27 22:44:08 s 1 -185550.57 7 +260057.85 8150.0 – C57
2020-12-27 22:54:08 S 06 55 22.961 -48 56 07.84 – V C57
2020-12-27 22:54:08 s 1 -185699.83 5 +259527.26 3590.0 – 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)