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
2020-12-25 11:54:08 S 06 58 13.090 -46 35 32.35 – V C57
2020-12-25 11:54:08 s 1 -98222.919 0 +383862.47 4330.0 – C57
2020-12-25 12:04:08 S 06 58 12.542 -46 35 56.26 – V C57
2020-12-25 12:04:08 s 1 -98534.796 0 +383676.47 8720.0 – C57
2020-12-25 12:14:08 S 06 58 11.945 -46 36 20.66 – V C57
2020-12-25 12:14:08 s 1 -98846.444 0 +383489.59 2740.0 – C57
2020-12-25 12:24:08 S 06 58 11.544 -46 36 44.89 – V C57
2020-12-25 12:24:08 s 1 -99157.863 0 +383301.82 6390.0 – C57
2020-12-25 12:34:08 S 06 58 11.095 -46 37 09.30 – V C57
2020-12-25 12:34:08 s 1 -99469.052 0 +383113.17 9670.0 – C57
2020-12-25 12:44:08 S 06 58 10.646 -46 37 33.85 – V C57
2020-12-25 12:44:08 s 1 -99780.010 0 +382923.64 2580.0 – C57
2020-12-25 12:54:08 S 06 58 10.171 -46 37 58.51 – V C57
2020-12-25 12:54:08 s 1 -100090.73 5 +382733.22 5110.0 – C57
2020-12-25 13:04:08 S 06 58 09.686 -46 38 22.74 – V C57
2020-12-25 13:04:08 s 1 -100401.22 8 +382541.91 7270.0 – C57
2020-12-25 13:14:08 S 06 58 09.408 -46 38 48.12 – V C57
2020-12-25 13:14:08 s 1 -100711.48 7 +382349.72 9050.0 – C57
2020-12-25 13:24:08 S 06 58 08.983 -46 39 12.49 – V C57
2020-12-25 13:24:08 s 1 -101021.51 1 +382156.65 450.0 – C57
2020-12-25 13:34:08 S 06 58 08.328 -46 39 36.61 – V C57
2020-12-25 13:34:08 s 1 -101331.29 9 +381962.69 1470.0 – C57
2020-12-25 13:44:08 S 06 58 07.982 -46 40 00.62 – V C57
2020-12-25 13:44:08 s 1 -101640.85 1 +381767.85 2110.0 – C57
2020-12-25 13:54:08 S 06 58 07.474 -46 40 25.61 – V C57
2020-12-25 13:54:08 s 1 -101950.16 5 +381572.12 2370.0 – C57
2020-12-25 14:04:08 S 06 58 06.967 -46 40 50.45 – V C57
2020-12-25 14:04:08 s 1 -102259.24 0 +381375.50 2240.0 – C57
2020-12-25 14:14:08 S 06 58 06.497 -46 41 14.86 – V C57
2020-12-25 14:14:08 s 1 -102568.07 6 +381178.00 1730.0 – C57
2020-12-25 14:24:08 S 06 58 06.096 -46 41 39.08 – V C57
2020-12-25 14:24:08 s 1 -102876.67 1 +380979.61 830.0 – C57
2020-12-25 14:34:08 S 06 58 05.676 -46 42 03.78 – V C57
2020-12-25 14:34:08 s 1 -103185.02 5 +380780.33 9550.0 – C57
2020-12-25 14:44:08 S 06 58 05.270 -46 42 27.61 – V C57
2020-12-25 14:44:08 s 1 -103493.13 7 +380580.17 7870.0 – C57
2020-12-25 14:54:08 S 06 58 04.622 -46 42 52.67 – V C57
2020-12-25 14:54:08 s 1 -103801.00 6 +380379.11 5810.0 – C57
2020-12-25 15:04:08 S 06 58 04.183 -46 43 18.05 – V C57
2020-12-25 15:04:08 s 1 -104108.63 0 +380177.17 3350.0 – C57
2020-12-25 15:14:08 S 06 58 03.715 -46 43 41.48 – V C57
2020-12-25 15:14:08 s 1 -104416.00 9 +379974.34 500.0 – C57
2020-12-25 15:24:08 S 06 58 03.377 -46 44 06.61 – V C57
2020-12-25 15:24:08 s 1 -104723.14 2 +379770.63 7260.0 – C57
2020-12-25 15:34:08 S 06 58 02.882 -46 44 31.42 – V C57
2020-12-25 15:34:08 s 1 -105030.02 8 +379566.02 3620.0 – C57
2020-12-25 15:44:08 S 06 58 02.443 -46 44 54.89 – V C57
2020-12-25 15:44:08 s 1 -105336.66 6 +379360.53 9580.0 – C57
2020-12-25 15:54:08 S 06 58 01.987 -46 45 19.58 – V C57
2020-12-25 15:54:08 s 1 -105643.05 4 +379154.14 5140.0 – 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)