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
2020-12-28 11:34:08 S 06 54 45.120 -49 25 01.34 – V C57
2020-12-28 11:34:08 s 1 -194375.09 4 +215794.94 9590.0 – C57
2020-12-28 11:44:08 S 06 54 44.702 -49 25 24.02 – V C57
2020-12-28 11:44:08 s 1 -194450.04 7 +215173.23 3470.0 – C57
2020-12-28 11:54:08 S 06 54 44.126 -49 25 46.45 – V C57
2020-12-28 11:54:08 s 1 -194523.86 1 +214550.28 5660.0 – C57
2020-12-28 12:04:08 S 06 54 43.601 -49 26 08.81 – V C57
2020-12-28 12:04:08 s 1 -194596.53 4 +213926.08 6120.0 – C57
2020-12-28 12:14:08 S 06 54 43.097 -49 26 33.00 – V C57
2020-12-28 12:14:08 s 1 -194668.05 8 +213300.63 4870.0 – C57
2020-12-28 12:24:08 S 06 54 42.614 -49 26 52.73 – V C57
2020-12-28 12:24:08 s 1 -194738.42 8 +212673.94 1890.0 – C57
2020-12-28 12:34:08 S 06 54 42.118 -49 27 16.42 – V C57
2020-12-28 12:34:08 s 1 -194807.64 1 +212046.00 7160.0 – C57
2020-12-28 12:44:08 S 06 54 41.597 -49 27 38.77 – V C57
2020-12-28 12:44:08 s 1 -194875.68 9 +211416.81 700.0 – C57
2020-12-28 12:54:08 S 06 54 41.071 -49 28 02.32 – V C57
2020-12-28 12:54:08 s 1 -194942.59 9 +210786.48 2500.0 – C57
2020-12-28 13:04:08 S 06 54 40.711 -49 28 23.70 – V C57
2020-12-28 13:04:08 s 1 -195009.60 5 +210159.19 3550.0 – C57
2020-12-28 13:14:08 S 06 54 40.198 -49 28 45.95 – V C57
2020-12-28 13:14:08 s 1 -195074.07 4 +209526.03 1730.0 – C57
2020-12-28 13:24:08 S 06 54 39.694 -49 29 09.31 – V C57
2020-12-28 13:24:08 s 1 -195137.42 1 +208891.84 8180.0 – C57
2020-12-28 13:34:08 S 06 54 39.166 -49 29 30.66 – V C57
2020-12-28 13:34:08 s 1 -195199.57 6 +208256.38 2850.0 – C57
2020-12-28 13:44:08 S 06 54 38.702 -49 29 54.02 – V C57
2020-12-28 13:44:08 s 1 -195260.53 5 +207619.67 5720.0 – C57
2020-12-28 13:54:08 S 06 54 38.234 -49 30 17.17 – V C57
2020-12-28 13:54:08 s 1 -195320.29 2 +206981.69 6780.0 – C57
2020-12-28 14:04:08 S 06 54 37.699 -49 30 38.88 – V C57
2020-12-28 14:04:08 s 1 -195378.84 1 +206342.45 6040.0 – C57
2020-12-28 14:14:08 S 06 54 37.138 -49 31 01.49 – V C57
2020-12-28 14:14:08 s 1 -195436.17 6 +205701.94 3470.0 – C57
2020-12-28 14:24:08 S 06 54 36.780 -49 31 24.78 – V C57
2020-12-28 14:24:08 s 1 -195492.29 3 +205060.17 9080.0 – C57
2020-12-28 14:34:08 S 06 54 36.151 -49 31 46.38 – V C57
2020-12-28 14:34:08 s 1 -195547.18 4 +204417.13 2850.0 – C57
2020-12-28 14:44:08 S 06 54 35.777 -49 32 09.46 – V C57
2020-12-28 14:44:08 s 1 -195600.84 5 +203772.82 4770.0 – C57
2020-12-28 14:54:08 S 06 54 35.237 -49 32 32.39 – V C57
2020-12-28 14:54:08 s 1 -195653.26 9 +203127.23 4840.0 – C57
2020-12-28 15:04:08 S 06 54 34.798 -49 32 54.74 – V C57
2020-12-28 15:04:08 s 1 -195704.45 1 +202480.38 3040.0 – C57
2020-12-28 15:14:08 S 06 54 34.380 -49 33 16.38 – V C57
2020-12-28 15:14:08 s 1 -195754.38 5 +201832.24 9380.0 – C57
2020-12-28 15:24:08 S 06 54 33.854 -49 33 38.52 – V C57
2020-12-28 15:24:08 s 1 -195803.06 5 +201182.83 3830.0 – C57
2020-12-28 15:34:08 S 06 54 33.199 -49 34 01.81 – V C57
2020-12-28 15:34:08 s 1 -195850.48 4 +200532.15 6390.0 – 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)