21648 Gravanschaik

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


caption =
discovery = yes
discovery_ref =
discoverer = Lincoln Laboratory Near-Earth Asteroid Research Team
discovery_site = Socorro
discovered = July 12, 1999
designations = yes
mp_name = 21648
alt_names = 1999 NB57
mp_category =
orbit_ref =
epoch = May 14, 2008
aphelion = 3.1990659
perihelion = 1.9989547
semimajor =
eccentricity = 0.2308785
period = 1530.4193158
avg_speed =
inclination = 11.54302
asc_node = 260.94686
mean_anomaly = 315.72655
arg_peri = 177.95894
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 = 14.4

21648 Gravanschaik (1999 NB57) is a Main-belt Asteroid discovered on July 12, 1999 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.

External links

* [http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=21648+Gravanschaik JPL Small-Body Database Browser on 21648 Gravanschaik]