290 Bruna

290 Bruna
	A three-dimensional model of 290 Bruna based on its light curve
Discovery
Discovered by	Johann Palisa
Discovery date	20 March 1890
Designations
MPC designation	(290) Bruna
Pronunciation	/ˈbruːnə/
Named after	Brno
Alternative designations	A890 FA
Minor planet category	main belt
Orbital characteristics
	Epoch 31 July 2016 (JD 2457600.5)
	Uncertainty parameter 0
Observation arc	100.87 yr (36843 d)
Aphelion	2.93884 AU (439.644 Gm)
Perihelion	1.73612 AU (259.720 Gm)
Semi-major axis	2.33748 AU (349.682 Gm)
Eccentricity	0.25727
Orbital period (sidereal)	3.57 yr (1305.3 d)
Mean anomaly	171.767°
Mean motion	0° 16m 32.851s / day
Inclination	22.3321°
Longitude of ascending node	10.4972°
Argument of perihelion	105.068°
Physical characteristics
Dimensions	9.822 km
Synodic rotation period	13.807 h (0.5753 d)
Geometric albedo	0.314
Absolute magnitude (H)	11.9

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

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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]

It was named by Hofrath August Bielsa for Brünn, now Brno, Czech Republic, Bielsa's home town.^[4]

[1]
"Numbered Minor Planets 1–5000", Discovery Circumstances, IAU Minor Planet center, retrieved 7 April 2013.
[2]
Yeomans, Donald K., "290 Bruna", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 11 May 2016.
[3]
Pilcher, Frederick (January 2009), "Period Determinations for 33 Polyhymnia, 38 Leda, 50 Virginia, 189 Phthia, and 290 Bruna", The Minor Planet Bulletin, vol. 36, no. 1, pp. 25–27, Bibcode:2009MPBu...36...25P.
[4]
Schmadel, Lutz D (2007). Dictionary of Minor Planet Names (5th ed.). Berlin Heidelberg New York: Springer. p. 40. ISBN 3-540-00238-3.