- 21447 Yungchieh
Infobox Planet
minorplanet = yes
width = 25em
bgcolour = #FFFFC0
apsis =
name = Yungchieh
symbol =
caption =
discovery = yes
discovery_ref =
discoverer =Lincoln Laboratory Near-Earth Asteroid Research Team
discovery_site =Socorro
discovered =April 18 ,1998
designations = yes
mp_name = 21447
alt_names = 1998 HZ18
mp_category =
orbit_ref =
epoch =May 14 ,2008
aphelion = 2.8669164
perihelion = 1.8600332
semimajor =
eccentricity = 0.2130091
period = 1327.1649166
avg_speed =
inclination = 1.35545
asc_node = 294.35815
mean_anomaly = 107.25304
arg_peri = 77.03338
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 = 14.821447 Yungchieh (1998 HZ18) is a
Main-belt Asteroid discovered onApril 18 ,1998 by theLincoln Laboratory Near-Earth Asteroid Research Team atSocorro .External links
* [http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=21447+Yungchieh JPL Small-Body Database Browser on 21447 Yungchieh]
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