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
2021-01-22 13:54:07 S 06 05 59.508 -69 57 17.93 – V C57
2021-01-22 13:54:07 s 1 -147964.22 3 +336487.65 2040.0 – C57
2021-01-22 14:04:08 S 06 05 57.814 -69 57 33.88 – V C57
2021-01-22 14:04:08 s 1 -148226.26 7 +336162.53 7930.0 – C57
2021-01-22 14:14:07 S 06 05 56.486 -69 57 50.83 – V C57
2021-01-22 14:14:07 s 1 -148487.88 8 +335836.44 3100.0 – C57
2021-01-22 14:24:08 S 06 05 55.025 -69 58 08.00 – V C57
2021-01-22 14:24:08 s 1 -148749.08 6 +335509.38 7540.0 – C57
2021-01-22 14:34:07 S 06 05 53.376 -69 58 22.73 – V C57
2021-01-22 14:34:07 s 1 -149009.85 7 +335181.35 1260.0 – C57
2021-01-22 14:44:08 S 06 05 51.934 -69 58 40.44 – V C57
2021-01-22 14:44:08 s 1 -149270.20 2 +334852.36 4250.0 – C57
2021-01-22 14:54:08 S 06 05 50.153 -69 58 55.70 – V C57
2021-01-22 14:54:08 s 1 -149530.11 8 +334522.39 6510.0 – C57
2021-01-22 15:04:07 S 06 05 48.542 -69 59 11.83 – V C57
2021-01-22 15:04:07 s 1 -149789.60 4 +334191.46 8040.0 – C57
2021-01-22 15:14:08 S 06 05 47.047 -69 59 27.20 – V C57
2021-01-22 15:14:08 s 1 -150048.65 9 +333859.55 8840.0 – C57
2021-01-22 15:24:07 S 06 05 45.502 -69 59 45.85 – V C57
2021-01-22 15:24:07 s 1 -150307.28 0 +333526.67 8890.0 – C57
2021-01-22 15:34:08 S 06 05 44.081 -70 00 02.45 – V C57
2021-01-22 15:34:08 s 1 -150565.46 8 +333192.83 8210.0 – C57
2021-01-22 15:44:07 S 06 05 42.442 -70 00 17.96 – V C57
2021-01-22 15:44:07 s 1 -150823.22 0 +332858.01 6780.0 – C57
2021-01-22 15:54:08 S 06 05 40.901 -70 00 33.48 – V C57
2021-01-22 15:54:08 s 1 -151080.53 4 +332522.21 4600.0 – C57
2021-01-22 16:04:07 S 06 05 39.319 -70 00 50.04 – V C57
2021-01-22 16:04:07 s 1 -151337.41 0 +332185.45 1680.0 – C57
2021-01-22 16:14:08 S 06 05 37.745 -70 01 05.92 – V C57
2021-01-22 16:14:08 s 1 -151593.84 5 +331847.71 8010.0 – C57
2021-01-22 16:24:08 S 06 05 35.959 -70 01 21.11 – V C57
2021-01-22 16:24:08 s 1 -151849.83 9 +331508.99 3580.0 – C57
2021-01-22 16:34:07 S 06 05 34.610 -70 01 39.07 – V C57
2021-01-22 16:34:07 s 1 -152105.38 9 +331169.30 8400.0 – C57
2021-01-22 16:44:08 S 06 05 32.998 -70 01 56.64 – V C57
2021-01-22 16:44:08 s 1 -152360.49 5 +330828.64 2460.0 – C57
2021-01-22 16:54:07 S 06 05 31.627 -70 02 11.83 – V C57
2021-01-22 16:54:07 s 1 -152615.15 5 +330487.00 5750.0 – C57
2021-01-22 17:04:08 S 06 05 29.995 -70 02 27.96 – V C57
2021-01-22 17:04:08 s 1 -152869.36 6 +330144.38 8280.0 – C57
2021-01-22 17:14:07 S 06 05 28.231 -70 02 44.12 – V C57
2021-01-22 17:14:07 s 1 -153123.12 8 +329800.79 50.0 – C57
2021-01-22 17:24:08 S 06 05 26.714 -70 03 00.83 – V C57
2021-01-22 17:24:08 s 1 -153376.44 0 +329456.21 1050.0 – C57
2021-01-22 17:34:07 S 06 05 25.154 -70 03 15.95 – V C57
2021-01-22 17:34:07 s 1 -153629.29 9 +329110.66 1270.0 – C57
2021-01-22 17:44:08 S 06 05 23.803 -70 03 32.62 – V C57
2021-01-22 17:44:08 s 1 -153881.70 4 +328764.13 720.0 – C57
2021-01-22 17:54:08 S 06 05 22.404 -70 03 49.75 – V C57
2021-01-22 17:54:08 s 1 -154133.65 4 +328416.63 9390.0 – 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)