290 Bruna

290 Bruna

A three-dimensional model of 290 Bruna based on its light curve.
Discovery[1]
Discovered by	Johann Palisa
Discovery date	March 20, 1890
Designations
Named after	Brno
Minor planet category	main belt
Orbital characteristics[2]
Epoch 30 January 2005 (JD 2453400.5)
Aphelion	440.159 Gm (2.942 AU)
Perihelion	259.103 Gm (1.732 AU)
Semi-major axis	349.631 Gm (2.337 AU)
Eccentricity	0.259
Orbital period	1,305.02 d (3.57 a)
Average orbital speed	19.48 km/s
Mean anomaly	93.824°
Inclination	22.308°
Longitude of ascending node	10.64°
Argument of perihelion	104.792°
Physical characteristics
Dimensions	11 - 24 km
Rotation period	13.807[3] h
Absolute magnitude (H)	11.5

290 Bruna is a main belt asteroid that was discovered on March 20, 1890 by Johann Palisa,^[1] an Austrian astronomer at the Vienna Observatory.

Photometric observations of this asteroid at the Organ Mesa Observatory in Las Cruces, New Mexico during 2008 gave a light curve with a period of 13.807 ± 0.001 hours and a brightness variation of 0.54 ± 0.04 in magnitude. Changes in the brightness of the minimum with phase angle is attributed to changes in the shadows across surface features.^[3]

References

1. "Numbered Minor Planets 1–5000", Discovery Circumstances (IAU Minor Planet center), retrieved 2013-04-07.
2. Yeomans, Donald K., "290 Bruna", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), retrieved 2013-04-07.
3. Pilcher, Frederick (January 2009), "Period Determinations for 33 Polyhymnia, 38 Leda, 50 Virginia, 189 Phthia, and 290 Bruna", The Minor Planet Bulletin 36 (1), pp. 25–27, Bibcode:2009MPBu...36...25P.

External links

• 290 Bruna at the JPL Small-Body Database

• Discovery · Orbit diagram · Orbital elements · Physical parameters