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
2021-07-21 13:23:59 S 18 50 45.300 +34 14 56.15 – V C57
2021-07-21 13:23:59 s 1 -200362.15 5 +123028.93 1450.0 – C57
2021-07-21 13:34:00 S 18 50 44.971 +34 14 48.37 – V C57
2021-07-21 13:34:00 s 1 -200269.91 9 +122261.78 3130.0 – C57
2021-07-21 13:43:59 S 18 50 44.431 +34 14 45.38 – V C57
2021-07-21 13:43:59 s 1 -200175.68 5 +121493.42 8460.0 – C57
2021-07-21 13:54:00 S 18 50 43.786 +34 14 39.59 – V C57
2021-07-21 13:54:00 s 1 -200079.44 3 +120723.86 7410.0 – C57
2021-07-21 14:03:59 S 18 50 43.250 +34 14 30.88 – V C57
2021-07-21 14:03:59 s 1 -199981.18 0 +119953.09 9940.0 – C57
2021-07-21 14:14:00 S 18 50 42.893 +34 14 25.94 – V C57
2021-07-21 14:14:00 s 1 -199880.88 7 +119181.12 6030.0 – C57
2021-07-21 14:24:00 S 18 50 42.566 +34 14 19.25 – V C57
2021-07-21 14:24:00 s 1 -199778.55 3 +118407.94 5630.0 – C57
2021-07-21 14:33:59 S 18 50 41.914 +34 14 13.63 – V C57
2021-07-21 14:33:59 s 1 -199674.16 5 +117633.56 8710.0 – C57
2021-07-21 14:44:00 S 18 50 41.549 +34 14 03.26 – V C57
2021-07-21 14:44:00 s 1 -199567.71 4 +116857.98 5240.0 – C57
2021-07-21 15:04:00 S 18 50 40.553 +34 13 55.67 – V C57
2021-07-21 15:04:00 s 1 -199348.57 5 +115303.20 8490.0 – C57
2021-07-21 15:13:59 S 18 50 40.164 +34 13 48.07 – V C57
2021-07-21 15:13:59 s 1 -199235.86 4 +114524.01 5150.0 – C57
2021-07-21 15:24:00 S 18 50 39.646 +34 13 41.38 – V C57
2021-07-21 15:24:00 s 1 -199121.04 4 +113743.63 5110.0 – C57
2021-07-21 15:33:59 S 18 50 39.079 +34 13 36.80 – V C57
2021-07-21 15:33:59 s 1 -199004.10 3 +112962.04 8330.0 – C57
2021-07-21 15:43:59 S 18 50 38.554 +34 13 27.77 – V C57
2021-07-21 15:43:59 s 1 -198885.02 9 +112179.26 4790.0 – C57
2021-07-21 15:54:00 S 18 50 38.184 +34 13 24.02 – V C57
2021-07-21 15:54:00 s 1 -198763.81 1 +111395.28 4440.0 – C57
2021-07-21 16:03:59 S 18 50 37.706 +34 13 16.32 – V C57
2021-07-21 16:03:59 s 1 -198640.43 6 +110610.10 7240.0 – C57
2021-07-21 16:14:00 S 18 50 37.121 +34 13 10.92 – V C57
2021-07-21 16:14:00 s 1 -198514.89 3 +109823.73 3170.0 – C57
2021-07-21 16:23:59 S 18 50 36.593 +34 13 06.38 – V C57
2021-07-21 16:23:59 s 1 -198387.16 9 +109036.16 2180.0 – C57
2021-07-21 16:34:00 S 18 50 36.331 +34 12 59.22 – V C57
2021-07-21 16:34:00 s 1 -198257.25 2 +108247.40 4230.0 – C57
2021-07-21 16:43:59 S 18 50 35.681 +34 12 57.71 – V C57
2021-07-21 16:43:59 s 1 -198125.13 1 +107457.46 9280.0 – C57
2021-07-21 17:03:59 S 18 50 34.738 +34 12 41.22 – V C57
2021-07-21 17:03:59 s 1 -197854.22 4 +105873.99 8250.0 – C57
2021-07-21 17:13:59 S 18 50 34.385 +34 12 39.74 – V C57
2021-07-21 17:13:59 s 1 -197715.41 4 +105080.48 2090.0 – C57
2021-07-21 17:24:00 S 18 50 33.816 +34 12 29.05 – V C57
2021-07-21 17:24:00 s 1 -197574.34 8 +104285.78 8780.0 – C57
2021-07-21 17:33:59 S 18 50 33.365 +34 12 22.93 – V C57
2021-07-21 17:33:59 s 1 -197431.01 5 +103489.89 8270.0 – C57
2021-07-21 17:44:00 S 18 50 32.947 +34 12 19.76 – V C57
2021-07-21 17:44:00 s 1 -197285.40 1 +102692.82 530.0 – 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)