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Table 1

Comparison of the COCD and MWSC surveys.


Basic catalogue Hipparcos+Tycho PPMXL
The tool catalogue ASCC-2.5 2MAst
Number of stars 2.5 mln. 470 mln.
Limiting magnitude V = 12.5 Ks = 15.3
Basic stellar data α,δ,μ,BV α,δ,μ,JH K s
Additional stellar data JHKs, Sp, RV BV, Sp, RV
Limiting distance 8 kpc >20 kpc
Completeness 0.85 kpc 1.8 kpc

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