(9928) 1981 WE9

Infobox Planet
minorplanet = yes
width = 25em
bgcolour = #FFFFC0
apsis =
name = mp|(9928) 1981 WE|9
symbol =


caption = Orbit of mp|(9928) 1981 WE|9 (blue), planets (red) and the Sun (black). The outermost planet visible is Jupiter.
discovery = yes
discovery_ref =
discoverer = Perth Observatory
discovered = November 16, 1981
designations = yes
mp_name = mp|(9928) 1981 WE|9
alt_names = mp|1971 TJ|1, mp|1993 FC|43
mp_category =
orbit_ref =
epoch = October 27, 2007
aphelion = 2.6091584 AU
perihelion = 1.8256226 AU
semimajor = 2.2173905 AU
eccentricity = 0.1766797
period = 1206.0400092 d
avg_speed =
inclination = 2.84296°
asc_node = 179.49922°
mean_anomaly = 346.22065°
arg_peri = 175.65482°
satellites =
physical_characteristics = yes
dimensions = ~12.9 km [cite web|url = http://www.iop.org/EJ/article/1538-3881/123/2/1056/FP206.txt?request-id=ZkkEm1jA3BGTV3i82wi7Kg|title = The supplemental IRAS minor planet survey (SIMPS)|author = Tedesco E.F., Noah P.V., Noah M., Price S.D.]
mass =
density =
surface_grav =
escape_velocity =
sidereal_day = 5.547 h [cite web|url = http://www.montgomerycollege.edu/faculty/~mclark/public_html/a9928.htm|title = Asteroid 9928 1981 WE9|author = Maurice Clark|publisher = Montgomery College]
axial_tilt =
pole_ecliptic_lat =
pole_ecliptic_lon =
albedo = ~0.01
temperatures=yes
temp_name1 = Kelvin
mean_temp_1 =
max_temp_1 =
temp_name2 = Celsius
max_temp_2 =
spectral_type =
abs_magnitude = 14.4

mp|(9928) 1981 WE|9 is a main belt asteroid. It orbits the Sun once every 3.30 years. [cite web|url = http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=9928|title = 9928 (1981 WE9)|work = JPL Small-Body Database Browser | publisher = NASA/JPL | accessdate = 2008-02-18] It is associated with the Flora family of asteroids. [cite web|url = http://www.psi.edu/pds/resource/family.html|author = Zappala, V., Ph. Bendjoya, A. Cellino, P. Farinella, and C. Froeschle|title = Asteroid Dynamical Families.|work = EAR-A-5-DDR-FAMILY-V4.1|publisher = NASA Planetary Data System|date = 1997]

Discovered on November 16, 1981 by the Perth Observatory in Bickley, it was given the provisional designation "mp|1981 WE|9". [MPO 65995 "Minor Planet Center"]

References