- 18840 Yoshioba
Infobox Planet
minorplanet = yes
width = 25em
bgcolour = #FFFFC0
apsis =
name = Yoshioba
symbol =
caption =
discovery = yes
discovery_ref =
discoverer =T. Okuni
discovery_site =Nanyo
discovered =August 8 ,1999
designations = yes
mp_name = 18840
alt_names = 1999 PT4
mp_category =
orbit_ref =
epoch =May 14 ,2008
aphelion = 2.4139584
perihelion = 2.3641178
semimajor =
eccentricity = 0.0104311
period = 1348.7548969
avg_speed =
inclination = 2.63377
asc_node = 263.79292
mean_anomaly = 357.46114
arg_peri = 215.66434
satellites =
physical_characteristics = yes
dimensions =
mass =
density =
surface_grav =
escape_velocity =
sidereal_day =
axial_tilt =
pole_ecliptic_lat =
pole_ecliptic_lon =
albedo =
temperatures=
temp_name1 =
mean_temp_1 =
max_temp_1 =
temp_name2 =
max_temp_2 =
spectral_type =
abs_magnitude = 14.018840 Yoshioba (1999 PT4) is a
Main-belt Asteroid discovered onAugust 8 ,1999 byT. Okuni atNanyo .External links
* [http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=18840+Yoshioba JPL Small-Body Database Browser on 18840 Yoshioba]
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