- 20336 Gretamills
Infobox Planet
minorplanet = yes
width = 25em
bgcolour = #FFFFC0
apsis =
name = Gretamills
symbol =
caption =
discovery = yes
discovery_ref =
discoverer =Lincoln Laboratory Near-Earth Asteroid Research Team
discovery_site =Socorro
discovered =April 21 ,1998
designations = yes
mp_name = 20336
alt_names = 1998 HY61
mp_category =
orbit_ref =
epoch =May 14 ,2008
aphelion = 3.1121742
perihelion = 2.1580792
semimajor =
eccentricity = 0.1810340
period = 1562.4303552
avg_speed =
inclination = 2.14909
asc_node = 183.89455
mean_anomaly = 344.79713
arg_peri = 177.93780
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 = 15.120336 Gretamills (1998 HY61) is a
Main-belt Asteroid discovered onApril 21 ,1998 by theLincoln Laboratory Near-Earth Asteroid Research Team atSocorro .External links
* [http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=20336+Gretamills JPL Small-Body Database Browser on 20336 Gretamills]
Wikimedia Foundation. 2010.