- 39 Laetitia
Infobox Planet | discovery=yes | physical_characteristics = yes | bgcolour=#FFFFC0
name=39 Laetitia
discoverer=J. Chacornac
discovered=February 8 ,1856
alt_names="none"
mp_category=Main belt
epoch=December 31 ,2006 (JD 2454100.5)
semimajor=414.190 Gm (2.769 AU)
perihelion=366.877 Gm (2.452 AU)
aphelion=461.503 Gm (3.085 AU)
eccentricity=0.114
period=1682.713 d (4.61 a)
inclination=10.383°
asc_node=157.168°
arg_peri=209.560°
mean_anomaly=58.261°
avg_speed=17.84 km/s
dimensions=149.5 km
mass=~3.5e|18 kg
density=2.0? g/cm³
surface_grav=~0.0418 m/s²
escape_velocity=~0.0790 km/s
rotation=0.2141 d (5.138 h) [ [http://www.psi.edu/pds/archive/lc.html] Dead link|date=March 2008]
spectral_type=S
magnitude = 8.86 to 12.07
abs_magnitude=6.1
albedo=0.287 (geometric) [ [http://www.psi.edu/pds/archive/astdata04/simps04/diamalb.tab] Dead link|date=March 2008]
angular_size = 0.142" to 0.051"
single_temperature=~158 K39 Laetitia (IPAEng|lɨˈtiːʃiə) is a large, bright
main belt asteroid .It was discovered by J. Chacornac on
February 8 ,1856 and named afterLaetitia , a minor Roman goddess of gaiety.References
External links
* [http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=39;orb=1 Orbital simulation] from JPL (Java) / [http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=39 Ephemeris]
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