Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a...104..296s&link_type=abstract
Astronomy and Astrophysics, vol. 104, no. 2, Dec. 1981, p. 296-299. Research supported by the Oesterreichischer Fonds zur Foerd
Astronomy and Astrophysics
Astrophysics
10
Asteroids, Astronomical Photometry, Electrophotometers, Planetary Rotation, Red Shift, Ubv Spectra, Color, Light (Visible Radiation), Periodic Variations, Surface Properties, Asteroids, Juno, Color, Surface, Photoelectric Methods, Photometry, Lightcurves, Earth-Based Observations, Rotation, Magnitude
Scientific paper
Observations were carried out on February 7-9 and March 12 and 13, 1980 at the European Southern Observatory in La Silla, Chile to find evidence of color variations on the surface of 3 Juno during a complete rotation cycle. Results show that Juno becomes redder just before the primary minimum of the lightcurve (B-V equals 0.845) and bluer before the primary maximum (B-V equals 0.820). The amplitude of the color variation during the rotation is approximately 0.025 m. The rotation period is found to be 7.209 h + or - 0.003 h, which is in agreement with earlier calculations. A new phase coefficient of 0.029 m/deg was computed with a mean absolute magnitude of V(1,0) equals 5.509 + or - 0.015.
Lagerkvist Claes-Ingvar
Schober Hans Josef
Schroll Alfred
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