5 citations · 5 across the 4 of their papers we have counts for
Showing 2003Show all
2 papers · 1 filter
astro-ph2003★ 5 cited
Magnitude systems in old star catalogues
Tomoko Fujiwara, Hitoshi Yamaoka
The current system of stellar magnitudes first introduced by Hipparchus was strictly defined by Norman Robert Pogson in 1856. He based his system on Ptolemy's star catalogue `Almag…
astro-ph2003
Photometrical Review of Open Cluster M25
A. L. Tadross, A. I. Osman, M. A. Marie +2
The young open star cluster M25 (IC 4725) is located in the direction of the galactic center in a crowded region, near much irregular absorption features on Sagittarius arm. This c…