Ursa Major
the Great Bear
the Great Bear
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 09 42 50.2171 | 41.4316750 | UMA 09 18 02.9977 | 41.4785957 | UMA 09 18 21.7707 | 46.4782791 | UMA 08 33 45.6249 | 46.5777283 | UMA 08 35 11.7921 | 59.5759888 | UMA
The 0h / 24h meridian is continuous. A coordinate jump there should not be treated as a straight line across a flat map.