207 Hedda

Infobox Planet | discovery=yes | physical_characteristics = yes | bgcolour=#FFFFC0 | name=207 Hedda
discoverer=Johann Palisa
discovered=October 17, 1879
alt_names=1932 CL₁, 1934 XJ,
1953 BF
mp_category=Main belt
epoch=30 January, 2005 (JD 2453400.5)
semimajor=341.655 Gm (2.284 AU)
perihelion=331.773 Gm (2.218 AU)
aphelion=351.538 Gm (2.35 AU)
eccentricity=0.029
period=1260.619 d (3.45 a)
inclination=3.804°
asc_node=29.292°
arg_peri=193.504°
mean_anomaly=275.242°
avg_speed=19.71 km/s
dimensions=59.0 km
mass="unknown"
density="unknown"
surface_grav="unknown"
escape_velocity="unknown"
rotation="unknown"
spectral_type=C
abs_magnitude=9.92
albedo=0.055
single_temperature="unknown"

207 Hedda is a sizeable Main belt asteroid. It is a C-type asteroid, meaning it is primitive in composition and dark in colour.

It was discovered by Johann Palisa on October 17, 1879 in Pola and was named after Hedwig, wife of astronomer Friedrich A. T. Winnecke.

References

* [ftp://ftp.lowell.edu/pub/elgb/astorb.html The Asteroid Orbital Elements Database]
* [http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html Minor Planet Discovery Circumstances]
* [http://www.psi.edu/pds/archive/albedo.html Asteroid Albedo Compilation]