Ophiuchus Constellation
Ophiuchus (The Serpent Bearer)
Ophiuchus is a unique and intriguing constellation, often referred to as "The Serpent Bearer." It represents a man holding a serpent, symbolizing the mythological figure Asclepius, the Greek god of healing. Though it is one of the largest constellations, Ophiuchus is often overlooked due to its location between the more prominent zodiac signs.
Key Features
- Bright Stars: Ophiuchus contains several notable stars:
- Alpha Ophiuchi (Rasalhague): A double star system marking the hand of the figure.
- Beta Ophiuchi (Cebalrai): A blue giant star marking the opposite shoulder of the figure.
- Deep-Sky Objects: Ophiuchus contains several interesting deep-sky objects:
- Messier 12 (M12): A globular cluster located approximately 24,000 light-years away, rich in stars.
- Messier 10 (M10): Another globular cluster that lies close to M12.
- NGC 6366: A star cluster with a faint, irregular shape, located about 3,600 light-years away.
Mythological Background
In Greek mythology, Ophiuchus is associated with Asclepius, the god of medicine and healing, who was said to have the ability to bring the dead back to life. According to myth, Asclepius learned the secret of resurrection from a serpent and was able to heal others. However, his power angered Zeus, who struck him down with a thunderbolt. In recognition of his great knowledge, Zeus placed Asclepius among the stars as Ophiuchus.
The serpent held by Asclepius is also symbolized in the caduceus, a staff entwined with two serpents, which is still used today as a symbol of medicine.
Cultural Significance
Though not traditionally considered part of the zodiac, Ophiuchus plays an important role in astrology, as it is located along the ecliptic, the apparent path of the Sun. Some modern astrologers have debated whether to include Ophiuchus as a 13th sign of the zodiac, although this is not widely adopted in traditional astrology.
Ophiuchus has also been significant in the study of celestial mechanics and the history of astronomy. Its position between the constellations of Scorpius and Sagittarius, along with its association with healing and medicine, continues to captivate astronomers and sky watchers alike.
Ophiuchus Rise and Set Timetable
| Time | Elevation | |
| Moon Rise, 0.3% illuminated | 06:03 | 24° |
| Ophiuchus Rise | 20:50 | |
| Civil sunset | 21:23 | 6° |
| Astrosession begin | 22:02 | 14° |
| Moon Set | 22:12 | 15° |
| Ophiuchus Transit | 02:32 | 45° |
| Astrosession end | 04:55 | 34° |
| Civil sunrise | 05:35 | 28° |
| Sunrise | 06:08 | 23° |
| Ophiuchus Set | 08:14 |
Track Ophiuchus Position Throughout the Night
← Wed, 28 May 2025 →
| Time | |
| Altitude | |
| Azimuth |
Annual motion of Ophiuchus
| Date | Wed, 28 May 2025 |
| Twighlight start | 22:43 |
| Twighlight end | 04:05 |
| Twighlight duration | 5h 21m |
| Rise | 20:50 |
| Set | 08:14 |
| Elevation at transit | 45° |
| Transit time | 02:32 |
| Equatorial coordinates | RA: 17h 24m 22s", Dec: -5° 07' 16s |
| Magnitude | - |
| Constellation |
The graph is structured with the vertical axis showing the hours of the day, ranging from 12 AM to 12 AM the next day, while the horizontal axis spans each day of the year.
The reddish shaded area indicates the periods when the Ophiuchus is above the horizon, visible to observers. The white line marks the times when the celestial object reaches its highest point in the sky each day, known as the transit.
Acknowledgements
We gratefully acknowledge the International Astronomical Union (IAU) for defining and standardizing the official constellation boundaries, which provide a consistent framework for celestial mapping.
Special thanks to Sky & Telescope Magazine and contributors Roger Sinnott and Rick Fienberg for their collaboration in producing the charts and tables. The constellation patterns, drawn by Alan MacRobert, were influenced by the work of H. A. Rey and thoughtfully adjusted to align with earlier traditions.