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 15:04:08 S 06 59 08.222 -45 43 52.39 – V C57
2020-12-24 15:04:08 s 1 -57729.101 0 +400218.71 5290.0 – C57
2020-12-24 15:14:08 S 06 59 07.694 -45 44 17.48 – V C57
2020-12-24 15:14:08 s 1 -58062.797 0 +400141.80 6380.0 – C57
2020-12-24 15:24:08 S 06 59 07.212 -45 44 43.26 – V C57
2020-12-24 15:24:08 s 1 -58396.368 0 +400064.03 7240.0 – C57
2020-12-24 15:34:08 S 06 59 06.965 -45 45 06.44 – V C57
2020-12-24 15:34:08 s 1 -58729.814 0 +399985.39 7870.0 – C57
2020-12-24 15:44:08 S 06 59 06.569 -45 45 33.59 – V C57
2020-12-24 15:44:08 s 1 -59063.134 0 +399905.88 8280.0 – C57
2020-12-24 15:54:08 S 06 59 06.019 -45 45 56.95 – V C57
2020-12-24 15:54:08 s 1 -59396.327 0 +399825.50 8460.0 – C57
2020-12-24 16:04:08 S 06 59 05.494 -45 46 23.05 – V C57
2020-12-24 16:04:08 s 1 -59729.392 0 +399744.25 8410.0 – C57
2020-12-24 16:14:08 S 06 59 05.179 -45 46 47.03 – V C57
2020-12-24 16:14:08 s 1 -60062.328 0 +399662.14 8130.0 – C57
2020-12-24 16:24:08 S 06 59 04.747 -45 47 12.16 – V C57
2020-12-24 16:24:08 s 1 -60395.136 0 +399579.16 7630.0 – C57
2020-12-24 16:34:08 S 06 59 04.286 -45 47 37.00 – V C57
2020-12-24 16:34:08 s 1 -60727.813 0 +399495.32 6890.0 – C57
2020-12-24 16:44:08 S 06 59 03.946 -45 48 02.59 – V C57
2020-12-24 16:44:08 s 1 -61060.360 0 +399410.61 5920.0 – C57
2020-12-24 16:54:08 S 06 59 03.386 -45 48 27.40 – V C57
2020-12-24 16:54:08 s 1 -61392.775 0 +399325.03 4710.0 – C57
2020-12-24 17:04:08 S 06 59 03.019 -45 48 52.20 – V C57
2020-12-24 17:04:08 s 1 -61725.058 0 +399238.58 3270.0 – C57
2020-12-24 17:14:08 S 06 59 02.518 -45 49 16.86 – V C57
2020-12-24 17:14:08 s 1 -62057.208 0 +399151.26 1600.0 – C57
2020-12-24 17:24:08 S 06 59 02.179 -45 49 42.82 – V C57
2020-12-24 17:24:08 s 1 -62389.223 0 +399063.08 9690.0 – C57
2020-12-24 17:34:08 S 06 59 01.742 -45 50 07.15 – V C57
2020-12-24 17:34:08 s 1 -62721.105 0 +398974.03 7540.0 – C57
2020-12-24 17:44:08 S 06 59 01.260 -45 50 31.74 – V C57
2020-12-24 17:44:08 s 1 -63052.850 0 +398884.11 5150.0 – C57
2020-12-24 17:54:08 S 06 59 00.802 -45 50 56.54 – V C57
2020-12-24 17:54:08 s 1 -63384.460 0 +398793.33 2530.0 – C57
2020-12-24 18:04:08 S 06 59 00.403 -45 51 22.03 – V C57
2020-12-24 18:04:08 s 1 -63715.933 0 +398701.67 9660.0 – C57
2020-12-24 18:14:08 S 06 58 59.928 -45 51 46.33 – V C57
2020-12-24 18:14:08 s 1 -64047.267 0 +398609.15 6550.0 – C57
2020-12-24 18:24:08 S 06 58 59.590 -45 52 12.00 – V C57
2020-12-24 18:24:08 s 1 -64378.464 0 +398515.77 3190.0 – C57
2020-12-24 18:34:08 S 06 58 59.038 -45 52 36.52 – V C57
2020-12-24 18:34:08 s 1 -64709.521 0 +398421.51 9590.0 – C57
2020-12-24 18:44:08 S 06 58 58.663 -45 53 02.26 – V C57
2020-12-24 18:44:08 s 1 -65040.437 0 +398326.39 5750.0 – C57
2020-12-24 18:54:08 S 06 58 58.234 -45 53 26.70 – V C57
2020-12-24 18:54:08 s 1 -65371.213 0 +398230.40 1660.0 – C57
2020-12-24 19:04:08 S 06 58 57.886 -45 53 52.01 – V C57
2020-12-24 19:04:08 s 1 -65701.847 0 +398133.54 7320.0 – 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)