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
2020-12-27 10:34:08 S 06 55 59.683 -48 27 30.24 – V C57
2020-12-27 10:34:08 s 1 -172638.21 4 +295821.19 5770.0 – C57
2020-12-27 10:44:08 S 06 55 59.083 -48 27 54.00 – V C57
2020-12-27 10:44:08 s 1 -172839.60 3 +295369.87 9740.0 – C57
2020-12-27 10:54:08 S 06 55 58.666 -48 28 17.29 – V C57
2020-12-27 10:54:08 s 1 -173040.36 9 +294917.50 2780.0 – C57
2020-12-27 11:04:08 S 06 55 58.044 -48 28 40.66 – V C57
2020-12-27 11:04:08 s 1 -173240.51 1 +294464.09 4870.0 – C57
2020-12-27 11:14:08 S 06 55 57.701 -48 29 03.88 – V C57
2020-12-27 11:14:08 s 1 -173440.02 7 +294009.63 6010.0 – C57
2020-12-27 11:24:08 S 06 55 57.192 -48 29 27.42 – V C57
2020-12-27 11:24:08 s 1 -173638.91 3 +293554.12 6200.0 – C57
2020-12-27 11:34:08 S 06 55 56.522 -48 29 51.58 – V C57
2020-12-27 11:34:08 s 1 -173837.16 8 +293097.56 5440.0 – C57
2020-12-27 11:44:08 S 06 55 56.153 -48 30 12.28 – V C57
2020-12-27 11:44:08 s 1 -174034.78 9 +292639.95 3730.0 – C57
2020-12-27 11:54:08 S 06 55 55.745 -48 30 36.18 – V C57
2020-12-27 11:54:08 s 1 -174231.77 4 +292181.28 1050.0 – C57
2020-12-27 12:04:08 S 06 55 55.164 -48 31 00.05 – V C57
2020-12-27 12:04:08 s 1 -174428.12 1 +291721.56 7410.0 – C57
2020-12-27 12:14:08 S 06 55 54.708 -48 31 23.38 – V C57
2020-12-27 12:14:08 s 1 -174623.82 7 +291260.79 2800.0 – C57
2020-12-27 12:24:08 S 06 55 54.094 -48 31 48.11 – V C57
2020-12-27 12:24:08 s 1 -174818.89 1 +290798.96 7220.0 – C57
2020-12-27 12:34:08 S 06 55 53.606 -48 32 10.18 – V C57
2020-12-27 12:34:08 s 1 -175013.30 9 +290336.07 660.0 – C57
2020-12-27 12:44:08 S 06 55 53.244 -48 32 34.01 – V C57
2020-12-27 12:44:08 s 1 -175207.07 9 +289872.13 3130.0 – C57
2020-12-27 12:54:08 S 06 55 52.620 -48 32 57.55 – V C57
2020-12-27 12:54:08 s 1 -175400.19 9 +289407.12 4620.0 – C57
2020-12-27 13:04:08 S 06 55 52.128 -48 33 21.49 – V C57
2020-12-27 13:04:08 s 1 -175592.66 6 +288941.06 5120.0 – C57
2020-12-27 13:14:08 S 06 55 51.732 -48 33 43.88 – V C57
2020-12-27 13:14:08 s 1 -175784.47 9 +288473.94 4630.0 – C57
2020-12-27 13:24:08 S 06 55 51.137 -48 34 07.64 – V C57
2020-12-27 13:24:08 s 1 -175975.63 4 +288005.75 3160.0 – C57
2020-12-27 13:34:08 S 06 55 50.683 -48 34 30.76 – V C57
2020-12-27 13:34:08 s 1 -176166.12 9 +287536.50 680.0 – C57
2020-12-27 13:44:08 S 06 55 50.160 -48 34 53.69 – V C57
2020-12-27 13:44:08 s 1 -176355.96 2 +287066.18 7210.0 – C57
2020-12-27 13:54:08 S 06 55 49.711 -48 35 17.20 – V C57
2020-12-27 13:54:08 s 1 -176545.13 0 +286594.80 2730.0 – C57
2020-12-27 14:04:08 S 06 55 49.234 -48 35 40.74 – V C57
2020-12-27 14:04:08 s 1 -176733.63 1 +286122.36 7250.0 – C57
2020-12-27 14:14:08 S 06 55 48.797 -48 36 03.24 – V C57
2020-12-27 14:14:08 s 1 -176921.46 2 +285648.84 750.0 – C57
2020-12-27 14:24:08 S 06 55 48.204 -48 36 26.71 – V C57
2020-12-27 14:24:08 s 1 -177108.62 1 +285174.26 3250.0 – C57
2020-12-27 14:34:08 S 06 55 47.822 -48 36 51.08 – V C57
2020-12-27 14:34:08 s 1 -177295.10 5 +284698.61 4720.0 – 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)