290 Bruna

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.

DiscoveredbyJohann Palisa

Discoverydate20 March 1890

MPCdesignation

(290) Bruna

Pronunciation/ˈbruːnə/

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290 Bruna

A three-dimensional model of 290 Bruna based on its light curve
Discovery[1]
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[2]
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)[2][3]
Geometric albedo	0.314
Absolute magnitude (H)	11.9

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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]