The asteroids 36 Atalante and 48 DORIS - Rotation, UBV-photometry, and lightcurves

Details The asteroids 36 Atalante and 48 DORIS - Rotation, UBV-photometry, and lightcurves The asteroids 36 Atalante and 48 DORIS - Rotation, UBV-photometry, and lightcurves

Mar 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...107..402s&link_type=abstract

Astronomy and Astrophysics, vol. 107, no. 2, Mar. 1982, p. 402-405. Research supported by the Oesterreichischer Fonds zur Foerd

Astronomy and Astrophysics

Astronomy

3

Asteroids, Astronomical Photometry, Light Curve, Planet Ephemerides, Ubv Spectra, Electrophotometry, Planetary Rotation, Asteroids, 36 Atalante Asteroid, 48 Doris Asteroid, Rotation, Astronomy, Ultraviolet, Photometry, Light Curves, Photoelectric Observations, Data, Physical Properties, Amplitude, Absolute Magnitude, Observations, Colors, Wavelengths

Scientific paper

The asteroids 36 Atalante and 48 Doris were observed during their opposition in 1978, using the ESO-0.5 m telescope at the European Southern Observatory, Chile. Both asteroids were investigated in the same season by Harris and Young (1980).
For 36 Atalante a period of rotation was derived with P = 9h.93±0h.01 (0d.4137±0d.0005) The maximum amplitude of the double mode lightcurve was found to be 0m.15. Frequent color measurements in UBV did not show any variation during the rotation, exceeding the scatter; mean colors are B-V 0.70±0.01 and U-B = 0.37±0.01.
48 Doris shows a rotation rate of P =11h.900±0h.005 (0d.4958±0h.0002) Considering observations by Harris and Young (1980) we state a double mode lightcurve, too, with a maximum amplitude of at least 0m.30. The lightcurve is not completely covered by observation. For 48 Doris a color variation on its surface is indicated in B-V, the side causing the secondary extrema being at about 0m.02 redder than that causing the primary ones; mean colors are B-V=0.71±0.01 and U-B=0.45±0.02.
Absolute magnitudes were computed for both asteroids using the mean phase coefficient φ = 0.039 mag/deg and considering that 48 Doris was observed at small phase angles.

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