Horologium Constellation
Double-click to unlock the map.
Horologium, the clock, is a faint southern constellation named by Nicolas-Louis de Lacaille to honor timekeeping.
Horologium Rise and Set Timetable
| Time | Elevation | |
| Horologium is always below the horizon | - | |
| Moon Set | 12:27 | -61° |
| Astrosession begin | 18:15 | -13° |
| Horologium Transit | 21:52 | -1° |
| Moon Rise, 57% illuminated | 23:50 | -5° |
| Astrosession end | 06:46 | -56° |
Track Horologium Position Throughout the Night
← Sat, 21 December 2024 →
| Time | |
| Altitude | |
| Azimuth |
Shift the map to change the time and observe Horologium changing position in the night sky.
Annual motion of Horologium
| Date | Sun, 22 December 2024 |
| Twighlight start | 18:44 |
| Twighlight end | 06:07 |
| Twighlight duration | 11h 23m |
| Rise | Horologium is always down |
| Set | Horologium is always down |
| Elevation at transit | -1° |
| Transit time | 21:48 |
| Equatorial coordinate | RA: 03h 25m 31s", Dec: -50° 57' 42s |
| Magnitude | - |
| Constellation |
The graph illustrates the annual visibility pattern of a Horologium, 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 Horologium 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 Horologium 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.