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
2021-02-03 22:14:07 s 1 -106929.56 7 +368222.83 2540.0 – C57
2021-02-03 22:24:07 S 05 01 10.409 -77 57 08.86 – V C57
2021-02-03 22:24:07 s 1 -107238.96 9 +368022.92 6310.0 – C57
2021-02-03 22:34:07 S 05 01 06.370 -77 57 23.11 – V C57
2021-02-03 22:34:07 s 1 -107548.09 8 +367822.07 9660.0 – C57
2021-02-03 22:44:07 S 05 01 02.326 -77 57 36.29 – V C57
2021-02-03 22:44:07 s 1 -107856.95 3 +367620.30 2590.0 – C57
2021-02-03 22:54:07 S 05 00 58.486 -77 57 51.12 – V C57
2021-02-03 22:54:07 s 1 -108165.53 4 +367417.60 5080.0 – C57
2021-02-03 23:04:07 S 05 00 54.518 -77 58 04.22 – V C57
2021-02-03 23:04:07 s 1 -108473.83 8 +367213.97 7150.0 – C57
2021-02-03 23:14:07 S 05 00 50.962 -77 58 18.77 – V C57
2021-02-03 23:14:07 s 1 -108781.86 6 +367009.41 8790.0 – C57
2021-02-03 23:24:07 S 05 00 47.002 -77 58 32.92 – V C57
2021-02-03 23:24:07 s 1 -109089.61 6 +366803.92 0.0 – C57
2021-02-03 23:34:07 S 05 00 42.922 -77 58 46.31 – V C57
2021-02-03 23:34:07 s 1 -109397.08 8 +366597.51 770.0 – C57
2021-02-03 23:44:07 S 05 00 39.444 -77 58 59.81 – V C57
2021-02-03 23:44:07 s 1 -109704.27 9 +366390.16 1110.0 – C57
2021-02-03 23:54:07 S 05 00 35.506 -77 59 14.68 – V C57
2021-02-03 23:54:07 s 1 -110011.19 0 +366181.88 1010.0 – C57
2021-02-04 00:04:07 S 05 00 31.721 -77 59 27.20 – V C57
2021-02-04 00:04:07 s 1 -110317.81 9 +365972.68 460.0 – C57
2021-02-04 00:14:07 S 05 00 28.080 -77 59 42.90 – V C57
2021-02-04 00:14:07 s 1 -110624.16 5 +365762.54 9480.0 – C57
2021-02-04 00:24:07 S 05 00 24.317 -77 59 55.61 – V C57
2021-02-04 00:24:07 s 1 -110930.22 7 +365551.48 8050.0 – C57
2021-02-04 00:44:07 S 05 00 16.346 -78 00 23.83 – V C57
2021-02-04 00:44:07 s 1 -111541.49 6 +365126.55 3860.0 – C57
2021-02-04 00:54:07 S 05 00 12.545 -78 00 37.51 – V C57
2021-02-04 00:54:07 s 1 -111846.70 0 +364912.69 1090.0 – C57
2021-02-04 01:04:07 S 05 00 09.103 -78 00 50.90 – V C57
2021-02-04 01:04:07 s 1 -112151.61 7 +364697.90 7870.0 – C57
2021-02-04 01:14:07 S 05 00 04.810 -78 01 05.99 – V C57
2021-02-04 01:14:07 s 1 -112456.24 4 +364482.18 4200.0 – C57
2021-02-04 01:24:07 S 05 00 00.691 -78 01 19.52 – V C57
2021-02-04 01:24:07 s 1 -112760.58 1 +364265.52 70.0 – C57
2021-02-04 01:34:07 S 04 59 56.990 -78 01 32.52 – V C57
2021-02-04 01:34:07 s 1 -113064.62 8 +364047.94 5490.0 – C57
2021-02-04 01:44:07 S 04 59 52.846 -78 01 47.75 – V C57
2021-02-04 01:44:07 s 1 -113368.38 2 +363829.42 450.0 – C57
2021-02-04 01:54:07 S 04 59 49.483 -78 02 01.61 – V C57
2021-02-04 01:54:07 s 1 -113671.84 3 +363609.97 4950.0 – C57
2021-02-04 02:04:07 S 04 59 45.065 -78 02 15.25 – V C57
2021-02-04 02:04:07 s 1 -113975.00 9 +363389.58 8980.0 – C57
2021-02-04 02:14:07 S 04 59 41.398 -78 02 29.11 – V C57
2021-02-04 02:14:07 s 1 -114277.88 1 +363168.26 2550.0 – C57
2021-02-04 02:24:07 S 04 59 37.267 -78 02 42.00 – V C57
2021-02-04 02:24:07 s 1 -114580.45 6 +362946.01 5660.0 – C57
2021-02-04 02:34:07 S 04 59 33.631 -78 02 55.82 – 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)