Libra Constellation
Libra (The Scales)
Libra is one of the 13 ecliptic constellations, symbolizing a set of scales and representing balance, justice, and harmony. It is unique as the only zodiac constellation representing an inanimate object. Though not particularly bright, Libra is an important constellation with deep mythological and historical connections.
Key Features
- Bright Stars: Libra contains a few notable stars:
- Zubenelgenubi (Alpha Librae): A binary star system and the brightest star in Libra, representing one of the balance's pans.
- Zubeneschamali (Beta Librae): The second brightest star, which some observers describe as having a greenish hue.
- Zubenelhakrabi (Gamma Librae): A giant star located in the central region of the constellation.
- Deep-Sky Objects: While Libra is relatively sparse in deep-sky objects, it includes:
- NGC 5897: A faint globular cluster located approximately 40,000 light-years away.
Mythological Background
Libra is often associated with the scales of justice held by Astraea, the goddess of justice, who is represented by the neighboring constellation Virgo. This association emphasizes Libra’s symbolic connection to fairness and balance. In Roman mythology, Libra was linked to the goddess Dike, another representation of justice.
In Babylonian astronomy, Libra was associated with balance and fairness, and its stars were sometimes considered part of the claws of the scorpion (Scorpius). The scales were later recognized as a distinct constellation, embodying the concept of equilibrium.
Cultural Significance
Libra’s association with balance and justice has made it a symbol in various cultures and philosophies. Its name, meaning "scales" in Latin, reflects its importance in marking the balance of day and night during the autumnal equinox in the Northern Hemisphere. Although the equinox has shifted due to precession, Libra’s symbolism endures in astrology and cultural references.
Libra Rise and Set Timetable
Time | Elevation | |
Moon Rise, 0.4% illuminated | 08:02 | 34° |
Libra Transit | 09:05 | 36° |
Libra Set | 14:16 | |
Moon Set | 16:49 | -29° |
Astrosession begin | 18:20 | -46° |
Libra Rise | 03:51 | |
Astrosession end | 06:49 | 28° |
Civil sunrise | 07:23 | 31° |
Sunrise | 07:55 | 34° |
Track Libra Position Throughout the Night
← Mon, 30 December 2024 →
Time | |
Altitude | |
Azimuth |
Annual motion of Libra
Date | Tue, 31 December 2024 |
Twighlight start | 18:49 |
Twighlight end | 06:10 |
Twighlight duration | 11h 21m |
Rise | 03:51 |
Set | 14:12 |
Elevation at transit | 36° |
Transit time | 09:02 |
Equatorial coordinate | RA: 15h 11m 56s", Dec: -13° 59' 11s |
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 Libra 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.