.png) 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° 16 32.851 / 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, 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.
It was named by Hofrath August Bielsa for Brünn, now Brno, Czech Republic, Bielsa's home town.
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
- 290 Bruna at the JPL Small-Body Database
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