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619 Triberga is a main belt asteroid discovered on 22 October 1906 by August Kopff at Heidelberg-Königstuhl State Observatory. Since it has an orbit that repeats itself almost exactly every four years with respect to the position of the Sun and Earth, it has been suggested as a way to calculate the mass of the Moon. Triberga was named for the German town of Triberg.

Since it has an absolute magnitude of 9.9, it is roughly 43 km in diameter. It has an opposition apparent magnitude of 13.5.

References

1. ^ "Discovery Circumstances: Numbered Minor Planets (1)–(5000)". IAU: Minor Planet Center. Archived from the original on 2 February 2009. Retrieved 21 December 2008.
2. ^ "619 Triberga (1906 WC)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 5 May 2016.
3. "(619) Triberga". AstDyS. Italy: University of Pisa. Archived from the original on 26 May 2011. Retrieved 21 December 2008.
4. Oliver; Shipley, Heath; Ditteon, Richard; et al. (2008). "Asteroid Lightcurve Analysis at the Oakley Southern Sky Observatory: 2008 March". The Minor Planet Bulletin. 35 (4): 149–150. Bibcode:2008MPBu...35..149O.
5. Pray (2006). "Lightcurve analysis of asteroids 326, 329, 426, 619, 1829, 1967, 2453, 10518 and 42267". The Minor Planet Bulletin. 33 (1): 4–5. Bibcode:2006MPBu...33....4P.
6. Neese (2005). "Asteroid Taxonomy". EAR-A-5-DDR-TAXONOMY-V5.0. Planetary Data System. Archived from the original on 10 March 2007. Retrieved 26 December 2008.
7. Tholen (2007). "Asteroid Absolute Magnitudes". EAR-A-5-DDR-ASTERMAG-V11.0. Planetary Data System. Archived from the original on 11 June 2008. Retrieved 26 December 2008.
8. Brouwer, Dirk & Ashbrook, Joseph (1951). "The minor planet 619 Triberga and the mass of the moon". The Astronomical Journal. 56 (3): 57–58. Bibcode:1951AJ.....56...57B. doi:10.1086/106513.
9. Schmadel, Lutz (2003). Dictionary of minor planet names (fifth ed.). Germany: Springer. p. 62. ISBN 3-540-00238-3. Retrieved 26 December 2008.

External links

• 619 Triberga at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 619 Triberga at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

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• Discoveries by August Kopff
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