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 14:04:07 S 05 54 37.999 -71 47 27.13 – V C57
2021-01-25 14:04:07 s 1 -188339.94 6 +93595.820 4840.0 – C57
2021-01-25 14:14:07 S 05 54 36.588 -71 47 41.89 – V C57
2021-01-25 14:14:07 s 1 -188116.23 6 +92762.543 8040.0 – C57
2021-01-25 14:24:07 S 05 54 34.997 -71 47 56.76 – V C57
2021-01-25 14:24:07 s 1 -187889.70 6 +91927.883 6200.0 – C57
2021-01-25 14:34:07 S 05 54 33.466 -71 48 11.02 – V C57
2021-01-25 14:34:07 s 1 -187660.33 7 +91091.840 9280.0 – C57
2021-01-25 14:44:07 S 05 54 32.026 -71 48 24.16 – V C57
2021-01-25 14:44:07 s 1 -187428.10 9 +90254.417 7250.0 – C57
2021-01-25 14:54:07 S 05 54 30.350 -71 48 37.66 – V C57
2021-01-25 14:54:07 s 1 -187193.00 3 +89415.615 70.0 – C57
2021-01-25 15:04:07 S 05 54 28.836 -71 48 52.67 – V C57
2021-01-25 15:04:07 s 1 -186954.99 8 +88575.436 7710.0 – C57
2021-01-25 15:14:07 S 05 54 27.552 -71 49 06.74 – V C57
2021-01-25 15:14:07 s 1 -186714.07 5 +87733.881 120.0 – C57
2021-01-25 15:24:07 S 05 54 26.150 -71 49 20.39 – V C57
2021-01-25 15:24:07 s 1 -186470.21 2 +86890.952 7270.0 – C57
2021-01-25 15:34:07 S 05 54 24.554 -71 49 34.28 – V C57
2021-01-25 15:34:07 s 1 -186223.39 1 +86046.651 9120.0 – C57
2021-01-25 15:44:07 S 05 54 22.968 -71 49 48.68 – V C57
2021-01-25 15:44:07 s 1 -185973.58 9 +85200.980 5630.0 – C57
2021-01-25 15:54:07 S 05 54 21.480 -71 50 01.75 – V C57
2021-01-25 15:54:07 s 1 -185720.78 5 +84353.941 6780.0 – C57
2021-01-25 16:04:07 S 05 54 19.992 -71 50 15.94 – V C57
2021-01-25 16:04:07 s 1 -185464.96 0 +83505.537 2510.0 – C57
2021-01-25 16:14:07 S 05 54 18.667 -71 50 31.06 – V C57
2021-01-25 16:14:07 s 1 -185206.09 0 +82655.768 2790.0 – C57
2021-01-25 16:24:07 S 05 54 17.407 -71 50 45.82 – V C57
2021-01-25 16:24:07 s 1 -184944.15 4 +81804.638 7580.0 – C57
2021-01-25 16:34:07 S 05 54 15.674 -71 50 59.14 – V C57
2021-01-25 16:34:07 s 1 -184679.13 1 +80952.150 6830.0 – C57
2021-01-25 16:44:07 S 05 54 14.266 -71 51 13.00 – V C57
2021-01-25 16:44:07 s 1 -184410.99 9 +80098.305 520.0 – C57
2021-01-25 16:54:07 S 05 54 12.689 -71 51 26.96 – V C57
2021-01-25 16:54:07 s 1 -184139.73 4 +79243.107 8590.0 – C57
2021-01-25 17:24:07 S 05 54 08.539 -71 52 09.41 – V C57
2021-01-25 17:24:07 s 1 -183306.92 1 +76669.419 8730.0 – C57
2021-01-25 17:34:07 S 05 54 06.934 -71 52 22.62 – V C57
2021-01-25 17:34:07 s 1 -183022.90 1 +75808.836 3940.0 – C57
2021-01-25 17:44:07 S 05 54 05.630 -71 52 37.31 – V C57
2021-01-25 17:44:07 s 1 -182735.63 3 +74946.914 3330.0 – C57
2021-01-25 17:54:07 S 05 54 04.034 -71 52 50.45 – V C57
2021-01-25 17:54:07 s 1 -182445.09 3 +74083.658 6850.0 – C57
2021-01-25 18:04:07 S 05 54 02.491 -71 53 04.70 – V C57
2021-01-25 18:04:07 s 1 -182151.25 9 +73219.070 4470.0 – C57
2021-01-25 18:14:07 S 05 54 01.082 -71 53 18.89 – V C57
2021-01-25 18:14:07 s 1 -181854.10 5 +72353.154 6120.0 – C57
2021-01-25 18:24:07 S 05 53 59.782 -71 53 32.93 – V C57
2021-01-25 18:24:07 s 1 -181553.60 7 +71485.914 1790.0 – 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)