839 Valborg is a mid-sized S-type Eunomian asteroid. Its diameter is about 20km, its albedo of 0.353 is very high for an asteroid. Its rotation period is 10.366 hourshttp://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2006MPBu...33...39W.

References

External links

• , Palmer Divide Observatory, B. D. Warner (2005)

• Asteroid Lightcurve Database (LCDB), query form (info )

• Dictionary of Minor Planet Names, Google books

• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend

• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center