Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000jrasc..94..241s&link_type=abstract
Journal of the Royal Astronomical Society of Canada, Vol. 94, p.241
Astronomy and Astrophysics
Astronomy
1
Scientific paper
An intense photoelectric magnitude study of Mars was carried out between 1998 and 2000. The selected normalized magnitudes for Mars in 1999 are: B(1,0) = -0.30 +/- 0.02, V(1,0) = -1.60 +/- 0.02, R(1,0) = -2.68 +/- 0.03 and I(1,0) = -3.17 +/- 0.03. The selected solar phase angle coefficients for Mars are: cB = 0.0185 +/- 0.0010, cV = 0.0152 +/- 0.0010, cR = 0.0110 +/- 0.0010 and cI = 0.0109 +/- 0.0010. In late 1998 and early 1999, Mars was 0.04 magnitude brighter than was predicted in the Astronomical Almanac. The brightness and colour measurements of Mars are consistent with mid-summer being cloudier than mid-spring.
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