WEBDA page for open cluster Berkeley 21

Basic Parameters			DSS Image: 10 x 10 arcminutes
Right Ascension (2000)	05 51 42
Declination (2000)	+21 47 00
Galactic longitude	186.840
Galactic latitude	-2.509
Distance [pc]	5000
Reddening [mag]	0.76
Distance modulus [mag]	15.85
Log Age	9.34
Metallicity	-0.83
Notes

Numbering system:

Query

• The database for data on any star
• The database for all data on any star
• Make selections on data
• The database for data on Am, Ap, Be, gK, BS, SB, WR stars
• From cluster map (scanned)
• From cluster chart (plotted)
• The cross-reference table
• The Budapest bibliography (Alter et al.)
• The bibliography of the last three | five | ten years

WEBDA content

• Available data
• Data collection and references
• General menu for photometric plots
• General menu for Isochrone plots (basic)
• General menu for Isochrone plots (advanced)
• UBV colour magnitude diagram
• VIc colour magnitude diagram

Archives

Other links

• Deep Sky Browser
• SIMBAD at CDS

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