Leo Constellation
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Leo, the lion, is a zodiac constellation best known for its bright star Regulus and its distinctive backward question mark or sickle shape.
Array
Leo Rise and Set Timetable
| Time | Elevation | |
| Astrosession begin | 00:22 | -12° |
| Leo Rise | 01:27 | |
| Moon Rise, 15.1% illuminated | 01:37 | 2° |
| Astrosession end | 04:21 | 34° |
| Civil sunrise | 04:51 | 40° |
| Sunrise | 05:19 | 45° |
| Leo Transit | 08:13 | 68° |
| Moon Set | 14:46 | 3° |
Track Leo Position Throughout the Night
← Fri, 17 October 2025 →
| Time | |
| Altitude | |
| Azimuth |
Shift the map to change the time and observe Leo changing position in the night sky.
Annual motion of Leo
| Date | Sat, 18 October 2025 |
| Twighlight start | 17:50 |
| Twighlight end | 03:45 |
| Twighlight duration | 10h 56m |
| Rise | 01:23 |
| Set | 14:56 |
| Elevation at transit | 68° |
| Transit time | 08:09 |
| Equatorial coordinates | RA: 10h 51m 55s", Dec: 15° 09' 10s |
| Magnitude | - |
| Constellation |
The graph illustrates the annual visibility pattern of a Leo, providing a comprehensive overview of its daily appearances and transit times throughout the year.
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 Leo 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.
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 Leo 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.