- 21989 Werntz
Infobox Planet
minorplanet = yes
width = 25em
bgcolour = #FFFFC0
apsis =
name = Werntz
symbol =
caption =
discovery = yes
discovery_ref =
discoverer =Lincoln Laboratory Near-Earth Asteroid Research Team
discovery_site =Socorro
discovered =December 5 ,1999
designations = yes
mp_name = 21989
alt_names = 1999 XU20
mp_category =
orbit_ref =
epoch =May 14 ,2008
aphelion = 3.6840963
perihelion = 2.5516367
semimajor =
eccentricity = 0.1816081
period = 2010.8732385
avg_speed =
inclination = 3.81336
asc_node = 189.99102
mean_anomaly = 175.67365
arg_peri = 244.46944
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 = 14.321989 Werntz (1999 XU20) is a
Main-belt Asteroid discovered onDecember 5 ,1999 by theLincoln Laboratory Near-Earth Asteroid Research Team atSocorro .External links
* [http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=21989+Werntz JPL Small-Body Database Browser on 21989 Werntz]
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