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
2020-12-24 06:04:08 s 1 -39545.639 0 +403083.73 3350.0 – C57
2020-12-24 06:54:08 S 06 59 28.978 -45 23 22.45 – V C57
2020-12-24 06:54:08 s 1 -41241.268 0 +402924.78 9780.0 – C57
2020-12-24 07:04:08 S 06 59 28.550 -45 23 46.97 – V C57
2020-12-24 07:04:08 s 1 -41580.136 0 +402890.38 560.0 – C57
2020-12-24 07:14:08 S 06 59 28.193 -45 24 13.43 – V C57
2020-12-24 07:14:08 s 1 -41918.917 0 +402855.11 1160.0 – C57
2020-12-24 07:24:08 S 06 59 27.694 -45 24 39.74 – V C57
2020-12-24 07:24:08 s 1 -42257.610 0 +402818.98 1590.0 – C57
2020-12-24 07:34:08 S 06 59 27.305 -45 25 03.68 – V C57
2020-12-24 07:34:08 s 1 -42596.214 0 +402781.98 1840.0 – C57
2020-12-24 07:44:08 S 06 59 26.842 -45 25 28.49 – V C57
2020-12-24 07:44:08 s 1 -42934.728 0 +402744.10 1920.0 – C57
2020-12-24 07:54:08 S 06 59 26.659 -45 25 54.88 – V C57
2020-12-24 07:54:08 s 1 -43273.152 0 +402705.36 1810.0 – C57
2020-12-24 08:04:08 S 06 59 26.426 -45 26 16.58 – V C57
2020-12-24 08:04:08 s 1 -43611.485 0 +402665.75 1540.0 – C57
2020-12-24 08:14:08 S 06 59 25.630 -45 26 44.09 – V C57
2020-12-24 08:14:08 s 1 -43949.725 0 +402625.28 1080.0 – C57
2020-12-24 08:24:08 S 06 59 25.073 -45 27 09.40 – V C57
2020-12-24 08:24:08 s 1 -44287.873 0 +402583.93 440.0 – C57
2020-12-24 08:34:08 S 06 59 24.710 -45 27 35.32 – V C57
2020-12-24 08:34:08 s 1 -44625.928 0 +402541.72 9620.0 – C57
2020-12-24 08:44:08 S 06 59 24.458 -45 27 58.61 – V C57
2020-12-24 08:44:08 s 1 -44963.888 0 +402498.64 8620.0 – C57
2020-12-24 08:54:08 S 06 59 23.904 -45 28 24.31 – V C57
2020-12-24 08:54:08 s 1 -45301.753 0 +402454.69 7430.0 – C57
2020-12-24 09:04:08 S 06 59 23.390 -45 28 49.19 – V C57
2020-12-24 09:04:08 s 1 -45639.522 0 +402409.87 6060.0 – C57
2020-12-24 09:14:08 S 06 59 23.102 -45 29 14.35 – V C57
2020-12-24 09:14:08 s 1 -45977.195 0 +402364.18 4510.0 – C57
2020-12-24 09:24:08 S 06 59 22.634 -45 29 40.02 – V C57
2020-12-24 09:24:08 s 1 -46314.771 0 +402317.63 2770.0 – C57
2020-12-24 09:24:47 C 06 59 07.23 -45 15 37.1 – V T08
2020-12-24 09:30:05 C 06 59 07.03 -45 15 50.4 – V T08
2020-12-24 09:34:08 S 06 59 22.358 -45 30 05.26 – V C57
2020-12-24 09:34:08 s 1 -46652.249 0 +402270.21 840.0 – C57
2020-12-24 09:38:44 C 06 59 06.68 -45 16 12.1 – V T08
2020-12-24 09:44:08 S 06 59 21.706 -45 30 30.53 – V C57
2020-12-24 09:44:08 s 1 -46989.628 0 +402221.92 8720.0 – C57
2020-12-24 09:54:08 S 06 59 21.346 -45 30 55.40 – V C57
2020-12-24 09:54:08 s 1 -47326.908 0 +402172.76 6410.0 – C57
2020-12-24 10:04:08 S 06 59 20.950 -45 31 19.70 – V C57
2020-12-24 10:04:08 s 1 -47664.087 0 +402122.74 3920.0 – C57
2020-12-24 10:14:08 S 06 59 20.592 -45 31 45.37 – V C57
2020-12-24 10:14:08 s 1 -48001.165 0 +402071.85 1230.0 – C57
2020-12-24 10:24:08 S 06 59 20.026 -45 32 10.54 – V C57
2020-12-24 10:24:08 s 1 -48338.142 0 +402020.09 8350.0 – C57
2020-12-24 10:34:08 S 06 59 19.644 -45 32 35.63 – V C57
2020-12-24 10:34:08 s 1 -48675.016 0 +401967.46 5270.0 – 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)