261 Prymno

261 Prymno

Discovery
Discovered by	C. H. F. Peters
Discovery date	October 31, 1886
Designations
Alternative names	n/a
Minor planet category	Main belt
Orbital characteristics
Epoch 30 January 2005 (JD 2453400.5)
Aphelion	380.063 Gm (2.541 AU)
Perihelion	317.429 Gm (2.122 AU)
Semi-major axis	348.746 Gm (2.331 AU)
Eccentricity	0.09
Orbital period	1300.07 d (3.56 a)
Average orbital speed	19.51 km/s
Mean anomaly	313.525°
Inclination	3.635°
Longitude of ascending node	96.779°
Argument of perihelion	65.502°
Physical characteristics
Dimensions	51.0 km
Mass	unknown
Mean density	unknown
Surface gravity	unknown
Escape velocity	unknown
Rotation period	8.002 h
Albedo	0.114
Temperature	unknown
Spectral type	B
Absolute magnitude (H)	9.44

261 Prymno is a somewhat large Main belt asteroid. It is classified as a B-type asteroid and probably has a primitive composition not unlike common C-type carbonaceous asteroids.

It was discovered by C. H. F. Peters on October 31, 1886 in Clinton, New York and was named after the Greek Oceanid Prymno.

References

• The Asteroid Orbital Elements Database
• Minor Planet Discovery Circumstances
• Asteroid Lightcurve Data File

External links

• 261 Prymno at the JPL Small-Body Database

• Discovery · Orbit diagram · Orbital elements · Physical parameters