Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011asuai...4...20c&link_type=abstract
Astronomia. La rivista dell' Unione Astrofili Italiani (ISSN 0392-2308), N. 4, p. 20-23 (luglio - agosto 2011)
Astronomy and Astrophysics
Astronomy
Cepheids, M31, M31_V1
Scientific paper
The first Cepheid discovered in M31 by E. P. Hubble around the end of 1923, has been re-observed with the 0.8 m Akiuz Mattei Telescope of Celado Observatory in order to update its photometric elements. They resulted: Max = JD 2455461.3 + 31.4d E, R max = 18.1, R min = 19.6, (B-V) = 0.7 (mean), (V-R) = 0.4 (mean). Based on a small sample of galactic Cepheids having known R magnitudes and parallaxes, the distance of M31 was estimated 780 kpc, or 2.5 Mly, accounting for the reddening.
Campestrin M.
Ceriani S.
Colombo Maria
Ercole L.
Favero Giancarlo
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