Ophiuchus
the Serpent Bearer
the Serpent Bearer
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.
The coordinate file includes two boundary consistency corrections. The reference chart retains its original printed outline.
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 16 22 24.6306 | -0.2963768 | OPH 16 22 14.0628 | 3.7033811 | OPH 16 51 13.4183 | 3.7852108 | OPH 16 50 48.3558 | 12.6179380 | OPH 17 20 47.0033 | 12.7061481 | OPH
The 0h / 24h meridian is continuous. A coordinate jump there should not be treated as a straight line across a flat map.