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
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.

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

References

"Numbered Minor Planets 1–5000", Discovery Circumstances, IAU Minor Planet center, retrieved 7 April 2013.
Yeomans, Donald K., "290 Bruna", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 11 May 2016.
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.
Schmadel, Lutz D (2007). Dictionary of Minor Planet Names (5th ed.). Berlin Heidelberg New York: Springer. p. 40. ISBN 3-540-00238-3.

External links

290 Bruna at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
290 Bruna at the JPL Small-Body Database

[IAU_MPC-1] "Numbered Minor Planets 1–5000", Discovery Circumstances, IAU Minor Planet center, retrieved 7 April 2013.

[JPL-2] Yeomans, Donald K., "290 Bruna", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 11 May 2016.

[Pilcher2009-3] 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.

1

2

3

4