| 494 Virtus |
Result | Rotation Period : 0.23208 +/- 0.00002 day Amplitude : 0.033 +/- 0.01 mag, |
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| Observational date: 2008-Mar, 15 21 22 27 Apr, 05( 5 nights) Zero time of the graph: 2008 Mar, 15.35000 day (UT) Observational site: Hamanowa Astronomical Observatory (fukushima-pref, Japan) Telescope : Pellow telescope (D=400mm fl=1800mm Newtonian F=4.5 CCD camera : SBIG ST-8 Filter system : Idas-R (UBVRI) Dark and Flat : Dark-frame and Flat-field were corrected. Light time : corrected. Remarks : | ||