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
2021-01-25 05:34:07 S 05 55 55.229 -71 35 20.65 – V C57
2021-01-25 05:34:07 s 1 -196409.39 0 +134246.58 1380.0 – C57
2021-01-25 05:44:07 S 05 55 53.803 -71 35 35.48 – V C57
2021-01-25 05:44:07 s 1 -196307.72 3 +133484.27 2160.0 – C57
2021-01-25 05:54:07 S 05 55 52.109 -71 35 50.60 – V C57
2021-01-25 05:54:07 s 1 -196204.01 2 +132720.58 9300.0 – C57
2021-01-25 06:04:07 S 05 55 50.496 -71 36 03.35 – V C57
2021-01-25 06:04:07 s 1 -196098.24 7 +131955.51 2790.0 – C57
2021-01-25 06:14:07 S 05 55 49.003 -71 36 16.78 – V C57
2021-01-25 06:14:07 s 1 -195990.41 4 +131189.06 2610.0 – C57
2021-01-25 06:24:07 S 05 55 47.350 -71 36 32.69 – V C57
2021-01-25 06:24:07 s 1 -195880.50 2 +130421.22 8730.0 – C57
2021-01-25 06:34:07 S 05 55 45.929 -71 36 48.53 – V C57
2021-01-25 06:34:07 s 1 -195768.49 8 +129652.00 1130.0 – C57
2021-01-25 06:44:07 S 05 55 44.575 -71 37 01.81 – V C57
2021-01-25 06:44:07 s 1 -195654.39 0 +128881.39 9800.0 – C57
2021-01-25 06:54:07 S 05 55 43.207 -71 37 16.79 – V C57
2021-01-25 06:54:07 s 1 -195538.16 5 +128109.39 4700.0 – C57
2021-01-25 07:04:07 S 05 55 41.395 -71 37 30.22 – V C57
2021-01-25 07:04:07 s 1 -195419.81 1 +127336.01 5810.0 – C57
2021-01-25 07:14:07 S 05 55 39.864 -71 37 45.08 – V C57
2021-01-25 07:14:07 s 1 -195299.31 5 +126561.24 3110.0 – C57
2021-01-25 07:24:07 S 05 55 38.177 -71 37 58.58 – V C57
2021-01-25 07:24:07 s 1 -195176.66 3 +125785.08 6580.0 – C57
2021-01-25 07:34:07 S 05 55 36.881 -71 38 12.77 – V C57
2021-01-25 07:34:07 s 1 -195051.84 4 +125007.53 6200.0 – C57
2021-01-25 07:44:07 S 05 55 35.186 -71 38 26.66 – V C57
2021-01-25 07:44:07 s 1 -194924.84 3 +124228.59 1930.0 – C57
2021-01-25 07:54:07 S 05 55 33.806 -71 38 42.76 – V C57
2021-01-25 07:54:07 s 1 -194795.64 8 +123448.26 3760.0 – C57
2021-01-25 08:04:07 S 05 55 32.102 -71 38 56.87 – V C57
2021-01-25 08:04:07 s 1 -194664.24 5 +122666.54 1660.0 – C57
2021-01-25 08:14:07 S 05 55 30.643 -71 39 10.62 – V C57
2021-01-25 08:14:07 s 1 -194530.62 1 +121883.43 5610.0 – C57
2021-01-25 08:24:07 S 05 55 29.059 -71 39 24.26 – V C57
2021-01-25 08:24:07 s 1 -194394.76 3 +121098.92 5580.0 – C57
2021-01-25 08:34:07 S 05 55 27.326 -71 39 39.17 – V C57
2021-01-25 08:34:07 s 1 -194256.65 6 +120313.02 1540.0 – C57
2021-01-25 08:54:07 S 05 55 24.658 -71 40 07.32 – V C57
2021-01-25 08:54:07 s 1 -193973.64 0 +118737.05 1360.0 – C57
2021-01-25 09:04:07 S 05 55 23.196 -71 40 22.37 – V C57
2021-01-25 09:04:07 s 1 -193828.70 4 +117946.97 5170.0 – C57
2021-01-25 09:14:07 S 05 55 21.595 -71 40 35.51 – V C57
2021-01-25 09:14:07 s 1 -193681.46 4 +117155.49 4870.0 – C57
2021-01-25 09:24:07 S 05 55 20.098 -71 40 51.02 – V C57
2021-01-25 09:24:07 s 1 -193531.90 4 +116362.62 440.0 – C57
2021-01-25 09:34:07 S 05 55 18.142 -71 41 04.49 – V C57
2021-01-25 09:34:07 s 1 -193380.01 1 +115568.36 1850.0 – C57
2021-01-25 09:44:07 S 05 55 16.752 -71 41 18.24 – V C57
2021-01-25 09:44:07 s 1 -193225.76 9 +114772.70 9080.0 – 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)