207 Hedda

207 Hedda

Discovery
Discovered by	Johann Palisa
Discovery date	October 17, 1879
Designations
Alternative names	1932 CL1, 1934 XJ, 1953 BF
Minor planet category	Main belt
Orbital characteristics
Epoch 30 January 2005 (JD 2453400.5)
Aphelion	2.35 AU
Perihelion	2.218 AU
Semi-major axis	2.284 AU
Eccentricity	0.029
Orbital period	1260.619 d (3.45 yr)
Average orbital speed	19.71 km/s
Mean anomaly	275.242°
Inclination	3.804°
Longitude of ascending node	29.292°
Argument of perihelion	193.504°
Physical characteristics
Dimensions	59.0 km
Rotation period	19.489 h
Albedo	0.055
Spectral type	C
Absolute magnitude (H)	9.92

207 Hedda is a sizeable Main belt asteroid. It is a C-type asteroid, meaning it is primitive in composition and dark in colour. This asteroid was discovered by Johann Palisa on October 17, 1879 in Pola and was named after Hedwig, wife of astronomer Friedrich A. T. Winnecke.

Attempts to determine the rotation period for this asteroid have led to conflicting results. A study published in 2010 using photometric observations from Organ Mesa Observatory showed a rotation period of 19.489 ± 0.002 hours and a brightness variation of 0.18 ± 0.02 in magnitude.

External links

• The Asteroid Orbital Elements Database
• Minor Planet Discovery Circumstances
• Asteroid Albedo Compilation