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
2018-12-07 01:44:39 s 1 -135420.76 3 +338266.44 8050.0 – C57
2018-12-07 02:14:39 S 03 56 23.647 -10 26 15.43 – V C57
2018-12-07 02:14:39 s 1 -136154.79 5 +337382.34 4790.0 – C57
2018-12-07 02:44:39 S 03 56 21.230 -10 26 54.60 – V C57
2018-12-07 02:44:39 s 1 -136885.15 9 +336489.44 620.0 – C57
2018-12-07 03:14:39 S 03 56 18.804 -10 27 34.27 – V C57
2018-12-07 03:14:39 s 1 -137611.82 3 +335587.74 5350.0 – C57
2018-12-07 03:44:39 S 03 56 16.370 -10 28 12.90 – V C57
2018-12-07 03:44:39 s 1 -138334.75 3 +334677.22 8790.0 – C57
2018-12-07 04:14:39 S 03 56 13.994 -10 28 52.00 – V C57
2018-12-07 04:14:39 s 1 -139053.91 4 +333757.86 770.0 – C57
2018-12-07 04:44:39 S 03 56 11.592 -10 29 30.80 – V C57
2018-12-07 04:44:39 s 1 -139769.27 2 +332829.66 1090.0 – C57
2018-12-07 05:14:39 S 03 56 09.096 -10 30 10.55 – V C57
2018-12-07 05:14:39 s 1 -140480.79 2 +331892.60 9550.0 – C57
2018-12-07 05:44:39 S 03 56 06.701 -10 30 48.85 – V C57
2018-12-07 05:44:39 s 1 -141188.43 9 +330946.67 5980.0 – C57
2018-12-07 06:14:39 S 03 56 04.274 -10 31 29.24 – V C57
2018-12-07 06:14:39 s 1 -141892.17 8 +329991.85 180.0 – C57
2018-12-07 06:44:39 S 03 56 01.908 -10 32 07.73 – V C57
2018-12-07 06:44:39 s 1 -142591.97 3 +329028.13 1940.0 – C57
2018-12-07 07:14:39 S 03 55 59.438 -10 32 47.65 – V C57
2018-12-07 07:14:39 s 1 -143287.78 8 +328055.49 1080.0 – C57
2018-12-07 07:44:39 S 03 55 57.022 -10 33 26.21 – V C57
2018-12-07 07:44:39 s 1 -143979.58 6 +327073.93 7400.0 – C57
2018-12-07 08:14:39 S 03 55 54.691 -10 34 05.20 – V C57
2018-12-07 08:14:39 s 1 -144667.33 0 +326083.42 690.0 – C57
2018-12-07 08:44:39 S 03 55 52.243 -10 34 43.54 – V C57
2018-12-07 08:44:39 s 1 -145350.98 3 +325083.95 750.0 – C57
2018-12-07 09:14:39 S 03 55 49.874 -10 35 21.98 – V C57
2018-12-07 09:14:39 s 1 -146030.50 8 +324075.51 7380.0 – C57
2018-12-07 09:44:39 S 03 55 47.431 -10 36 02.23 – V C57
2018-12-07 09:44:39 s 1 -146705.86 6 +323058.08 370.0 – C57
2018-12-07 10:14:39 S 03 55 45.067 -10 36 40.82 – V C57
2018-12-07 10:14:39 s 1 -147377.01 9 +322031.65 9520.0 – C57
2018-12-07 10:44:39 S 03 55 42.636 -10 37 19.38 – V C57
2018-12-07 10:44:39 s 1 -148043.92 8 +320996.19 4600.0 – C57
2018-12-07 11:14:39 S 03 55 40.265 -10 37 58.58 – V C57
2018-12-07 11:14:39 s 1 -148706.55 3 +319951.70 5410.0 – C57
2018-12-07 11:44:39 S 03 55 37.865 -10 38 37.97 – V C57
2018-12-07 11:44:39 s 1 -149364.85 7 +318898.15 1740.0 – C57
2018-12-07 12:14:39 S 03 55 35.503 -10 39 16.99 – V C57
2018-12-07 12:14:39 s 1 -150018.79 7 +317835.53 3360.0 – C57
2018-12-07 12:44:39 S 03 55 33.005 -10 39 55.98 – V C57
2018-12-07 12:44:39 s 1 -150668.33 4 +316763.83 60.0 – C57
2018-12-07 13:14:39 S 03 55 30.751 -10 40 33.53 – V C57
2018-12-07 13:14:39 s 1 -151313.42 6 +315683.03 1620.0 – C57
2018-12-07 13:44:39 S 03 55 28.260 -10 41 14.17 – V C57
2018-12-07 13:44:39 s 1 -151954.03 3 +314593.11 7800.0 – C57
2018-12-07 14:14:39 S 03 55 25.915 -10 41 51.86 – 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)