Cassiopeia
the Seated Queen
the Seated Queen
Fixed J2000 coordinates
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How to read this chart
Dots mark stars, and their sizes indicate brightness. Stars appear dark on light charts and light on dark charts. Green lines show a constellation pattern. The surrounding grid gives right ascension and declination.
This is a fixed reference map, rather than a view of tonight’s sky.
Read the full chart guide →Boundary coordinates
The boundary marks a sky region; it is separate from the green star pattern. These files preserve ordered coordinate points in the J2000 reference system.
View coordinate format & sample
Right ascension uses hours, minutes and seconds. Declination is in degrees. Convert right ascension to degrees with 15 × (hours + minutes/60 + seconds/3600).
RA (h m s) | Dec (degrees) | Abbreviation 22 57 22.2843 | 53.1680298 | CAS 22 57 12.9665 | 56.9179611 | CAS 22 57 04.5897 | 59.7512321 | CAS 23 15 26.3193 | 59.7646751 | CAS 23 15 15.9577 | 63.6812897 | CAS
The 0h / 24h meridian is continuous. A coordinate jump there should not be treated as a straight line across a flat map.