21640 Petekirkland

Infobox Planet
minorplanet = yes
width = 25em
bgcolour = #FFFFC0
apsis =
name = Petekirkland
symbol =


caption =
discovery = yes
discovery_ref =
discoverer = Lincoln Laboratory Near-Earth Asteroid Research Team
discovery_site = Socorro
discovered = July 14, 1999
designations = yes
mp_name = 21640
alt_names = 1999 NX39
mp_category =
orbit_ref =
epoch = May 14, 2008
aphelion = 2.6887413
perihelion = 1.8658451
semimajor =
eccentricity = 0.1806742
period = 1255.2402357
avg_speed =
inclination = 5.81793
asc_node = 356.44959
mean_anomaly = 124.59423
arg_peri = 51.27701
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 = 14.6

21640 Petekirkland (1999 NX39) is a Main-belt Asteroid discovered on July 14, 1999 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.

External links

* [http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=21640+Petekirkland JPL Small-Body Database Browser on 21640 Petekirkland]