147 Protogeneia

Infobox Planet | minorplanet = yes | width = 25em | bgcolour = #FFFFC0
name=147 Protogeneia
discovery=yes
discovery_ref= [http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html]
discoverer=Lipót Schulhof
discovered=July 10, 1875
alt_names=
mp_category=Main belt
orbit_ref= [ftp://ftp.lowell.edu/pub/elgb/astorb.html]
epoch=December 31, 2006 (JD 2454100.5)
semimajor=468.891 Gm (3.134 AU)
perihelion=452.926 Gm (3.028 AU)
aphelion=484.856 Gm (3.241 AU)
eccentricity=0.034
period=2026.831 d (5.55 a)
inclination=1.935°
asc_node=248.729°
arg_peri=106.744°
mean_anomaly=185.625°
avg_speed=16.82 km/s
physical_characteristics=yes
dimensions=132.93 kmcite web
title=JPL Small-Body Database Browser: 147 Protogeneia
url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=147
date=1997-07-17
accessdate=2008-05-21]
mass=2.5e|18 kg
density=2.0 g/cm³
surface_grav=0.0371 m/s²
escape_velocity=0.0703 km/s
sidereal_day=7.853 hr
axial_tilt=?° | pole_ecliptic_lat=? | pole_ecliptic_lon=?
spectral_type=C
magnitude = 12.4 to 14.5
abs_magnitude=8.27
albedo=0.0492
single_temperature=~157 K

147 Protogeneia is a large main belt asteroid with a low eccentricity and low inclination . It has a dark surface and probably a primitive composition of carbonaceous material.

It was discovered by Lipót Schulhof on July 10, 1875, his only asteroid discovery. It is named after Protogeneia, one of the daughters of Deucalion and Pyrra in Greek mythology.

There is one reported stellar occultation by Protogeneia, on May 28, 2002 from Texas.

References

External links

* [http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=147;orb=1 Orbital simulation] from JPL (Java) / [http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=147 Horizons Ephemeris]