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
2021-02-04 02:34:07 s 1 -114882.73 4 +362722.82 8300.0 – C57
2021-02-04 02:44:07 S 04 59 30.146 -78 03 09.94 – V C57
2021-02-04 02:44:07 s 1 -115184.71 3 +362498.70 460.0 – C57
2021-02-04 02:54:07 S 04 59 25.968 -78 03 24.19 – V C57
2021-02-04 02:54:07 s 1 -115486.39 3 +362273.65 2160.0 – C57
2021-02-04 03:04:07 S 04 59 22.430 -78 03 38.38 – V C57
2021-02-04 03:04:07 s 1 -115787.77 3 +362047.66 3380.0 – C57
2021-02-04 03:14:07 S 04 59 18.307 -78 03 51.80 – V C57
2021-02-04 03:14:07 s 1 -116088.85 0 +361820.74 4130.0 – C57
2021-02-04 03:24:07 S 04 59 14.467 -78 04 04.66 – V C57
2021-02-04 03:24:07 s 1 -116389.62 5 +361592.88 4400.0 – C57
2021-02-04 03:44:07 S 04 59 06.938 -78 04 34.14 – V C57
2021-02-04 03:44:07 s 1 -116990.26 3 +361134.35 3490.0 – C57
2021-02-04 03:54:07 S 04 59 02.453 -78 04 47.24 – V C57
2021-02-04 03:54:07 s 1 -117290.12 4 +360903.68 2320.0 – C57
2021-02-04 04:04:07 S 04 58 58.409 -78 05 01.36 – V C57
2021-02-04 04:04:07 s 1 -117589.67 8 +360672.08 650.0 – C57
2021-02-04 04:14:07 S 04 58 55.008 -78 05 15.90 – V C57
2021-02-04 04:14:07 s 1 -117888.92 4 +360439.54 8510.0 – C57
2021-02-04 04:24:07 S 04 58 50.719 -78 05 28.50 – V C57
2021-02-04 04:24:07 s 1 -118187.86 0 +360206.06 5870.0 – C57
2021-02-04 04:34:07 S 04 58 47.201 -78 05 42.22 – V C57
2021-02-04 04:34:07 s 1 -118486.48 7 +359971.64 2740.0 – C57
2021-02-04 04:44:07 S 04 58 43.282 -78 05 57.08 – V C57
2021-02-04 04:44:07 s 1 -118784.80 2 +359736.29 9120.0 – C57
2021-02-04 04:54:07 S 04 58 39.782 -78 06 10.40 – V C57
2021-02-04 04:54:07 s 1 -119082.80 5 +359500.00 5000.0 – C57
2021-02-04 05:04:07 S 04 58 35.270 -78 06 23.15 – V C57
2021-02-04 05:04:07 s 1 -119380.49 4 +359262.77 380.0 – C57
2021-02-04 05:14:07 S 04 58 31.322 -78 06 36.79 – V C57
2021-02-04 05:14:07 s 1 -119677.86 9 +359024.60 5270.0 – C57
2021-02-04 05:24:07 S 04 58 27.610 -78 06 51.23 – V C57
2021-02-04 05:24:07 s 1 -119974.92 8 +358785.50 9650.0 – C57
2021-02-04 05:34:07 S 04 58 23.242 -78 07 04.76 – V C57
2021-02-04 05:34:07 s 1 -120271.67 0 +358545.45 3540.0 – C57
2021-02-04 05:44:07 S 04 58 19.656 -78 07 19.52 – V C57
2021-02-04 05:44:07 s 1 -120568.09 5 +358304.46 6910.0 – C57
2021-02-04 05:54:07 S 04 58 15.631 -78 07 33.13 – V C57
2021-02-04 05:54:07 s 1 -120864.20 0 +358062.54 9780.0 – C57
2021-02-04 06:04:07 S 04 58 11.892 -78 07 46.02 – V C57
2021-02-04 06:04:07 s 1 -121159.98 6 +357819.67 2140.0 – C57
2021-02-04 06:14:07 S 04 58 07.918 -78 07 59.63 – V C57
2021-02-04 06:14:07 s 1 -121455.45 0 +357575.87 3990.0 – C57
2021-02-04 06:24:07 S 04 58 03.641 -78 08 13.74 – V C57
2021-02-04 06:24:07 s 1 -121750.59 2 +357331.12 5320.0 – C57
2021-02-04 06:34:07 S 04 58 00.067 -78 08 28.18 – V C57
2021-02-04 06:34:07 s 1 -122045.41 0 +357085.43 6140.0 – C57
2021-02-04 06:44:07 S 04 57 56.160 -78 08 42.00 – V C57
2021-02-04 06:44:07 s 1 -122339.90 4 +356838.80 6440.0 – C57
2021-02-04 06:54:07 S 04 57 52.238 -78 08 54.53 – 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)