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
2020-12-26 17:24:08 S 06 56 49.982 -47 46 57.36 – V C57
2020-12-26 17:24:08 s 1 -148943.78 8 +336870.30 9510.0 – C57
2020-12-26 17:34:08 S 06 56 49.438 -47 47 21.55 – V C57
2020-12-26 17:34:08 s 1 -149198.73 7 +336522.10 4910.0 – C57
2020-12-26 17:44:08 S 06 56 48.905 -47 47 44.23 – V C57
2020-12-26 17:44:08 s 1 -149453.25 2 +336172.94 9640.0 – C57
2020-12-26 17:54:08 S 06 56 48.485 -47 48 08.60 – V C57
2020-12-26 17:54:08 s 1 -149707.33 4 +335822.81 3700.0 – C57
2020-12-26 18:04:08 S 06 56 47.930 -47 48 32.15 – V C57
2020-12-26 18:04:08 s 1 -149960.97 9 +335471.72 7100.0 – C57
2020-12-26 18:14:08 S 06 56 47.393 -47 48 56.88 – V C57
2020-12-26 18:14:08 s 1 -150214.18 7 +335119.66 9830.0 – C57
2020-12-26 18:24:08 S 06 56 46.949 -47 49 19.52 – V C57
2020-12-26 18:24:08 s 1 -150466.95 7 +334766.64 1880.0 – C57
2020-12-26 18:34:08 S 06 56 46.567 -47 49 44.33 – V C57
2020-12-26 18:34:08 s 1 -150719.28 6 +334412.66 3260.0 – C57
2020-12-26 18:44:08 S 06 56 46.039 -47 50 08.63 – V C57
2020-12-26 18:44:08 s 1 -150971.17 3 +334057.70 3970.0 – C57
2020-12-26 18:54:08 S 06 56 45.540 -47 50 31.27 – V C57
2020-12-26 18:54:08 s 1 -151222.61 7 +333701.79 4000.0 – C57
2020-12-26 19:04:08 S 06 56 44.966 -47 50 55.32 – V C57
2020-12-26 19:04:08 s 1 -151473.61 6 +333344.90 3340.0 – C57
2020-12-26 19:14:08 S 06 56 44.650 -47 51 19.62 – V C57
2020-12-26 19:14:08 s 1 -151724.16 8 +332987.05 2000.0 – C57
2020-12-26 19:24:08 S 06 56 44.198 -47 51 43.24 – V C57
2020-12-26 19:24:08 s 1 -151974.27 2 +332628.23 9980.0 – C57
2020-12-26 19:34:08 S 06 56 43.514 -47 52 06.10 – V C57
2020-12-26 19:34:08 s 1 -152223.92 7 +332268.43 7270.0 – C57
2020-12-26 19:44:08 S 06 56 43.049 -47 52 30.72 – V C57
2020-12-26 19:44:08 s 1 -152473.13 1 +331907.67 3870.0 – C57
2020-12-26 19:54:08 S 06 56 42.667 -47 52 54.70 – V C57
2020-12-26 19:54:08 s 1 -152721.88 1 +331545.94 9770.0 – C57
2020-12-26 20:04:08 S 06 56 42.187 -47 53 18.42 – V C57
2020-12-26 20:04:08 s 1 -152970.17 8 +331183.23 4990.0 – C57
2020-12-26 20:14:08 S 06 56 41.681 -47 53 41.86 – V C57
2020-12-26 20:14:08 s 1 -153218.01 9 +330819.56 9500.0 – C57
2020-12-26 20:24:08 S 06 56 41.194 -47 54 05.87 – V C57
2020-12-26 20:24:08 s 1 -153465.40 2 +330454.91 3320.0 – C57
2020-12-26 20:34:08 S 06 56 40.766 -47 54 30.56 – V C57
2020-12-26 20:34:08 s 1 -153712.32 6 +330089.28 6440.0 – C57
2020-12-26 20:44:08 S 06 56 40.303 -47 54 53.42 – V C57
2020-12-26 20:44:08 s 1 -153958.79 0 +329722.69 8850.0 – C57
2020-12-26 20:54:08 S 06 56 39.768 -47 55 16.93 – V C57
2020-12-26 20:54:08 s 1 -154204.79 2 +329355.11 550.0 – C57
2020-12-26 21:04:08 S 06 56 39.252 -47 55 40.30 – V C57
2020-12-26 21:04:08 s 1 -154450.32 9 +328986.56 1550.0 – C57
2020-12-26 21:14:08 S 06 56 38.846 -47 56 04.13 – V C57
2020-12-26 21:14:08 s 1 -154695.40 2 +328617.04 1840.0 – C57
2020-12-26 21:34:08 S 06 56 37.706 -47 56 51.83 – V C57
2020-12-26 21:34:08 s 1 -155184.14 3 +327875.06 270.0 – 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)