Cujam
Cujam (ω Herculis) is a blue-white star in the constellation Hercules. With an apparent magnitude of 4.57 it is the 973rd-brightest star in the night sky, and it is about 249 light-years from Earth.
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Facts
| Constellation | Hercules |
|---|---|
| Designation | ω Herculis (Omega Herculis), HR 6117 |
| Apparent magnitude | 4.57 (973rd brightest) |
| Spectral type | B9pCr |
| Color | blue-white (B−V 0.00) |
| Distance | about 249 light-years |
| Right ascension | 16 h 25.4 min |
| Declination | +14.03° |
| Best month | July (at about 9 pm) |
How to find Cujam
Cujam is in Hercules. From 40° N it is highest in the south in July evenings, about 64° above the horizon. From 35° S it reaches about 41° in the north. Nearby bright stars: Rasalhague (17° away), Alphecca (17° away) and Arcturus (31° away).
Where on Earth can you see Cujam?
Cujam is best seen in the evening in July. The table shows, for different latitudes, whether it ever rises and how high it climbs when it crosses the meridian.
| Latitude | Visibility | Highest point |
|---|---|---|
| 60° N (Oslo, Helsinki) | Rises and sets | 44° (south) |
| 50° N (Frankfurt, Prague) | Rises and sets | 54° (south) |
| 40° N (New York, Madrid, Beijing) | Rises and sets | 64° (south) |
| 30° N (Cairo, New Orleans) | Rises and sets | 74° (south) |
| 20° N (Mexico City, Mumbai) | Rises and sets | 84° (south) |
| 0° (Quito, Nairobi) | Rises and sets | 76° (north) |
| 20° S (Rio de Janeiro area) | Rises and sets | 56° (north) |
| 35° S (Sydney, Buenos Aires) | Rises and sets | 41° (north) |
| 45° S (Dunedin, southern Patagonia) | Rises and sets | 31° (north) |
How far away is Cujam?
Cujam is about 249 light-years from Earth. The light you see tonight left the star around the year 1780. That is about 57 times farther than Alpha Centauri, the nearest star system to the Sun.
What kind of star is Cujam?
Cujam has the spectral type B9pCr. Stars of class B have surface temperatures of about 10,000 to 30,000 kelvin, which makes them look blue-white.
Questions about Cujam
How far away is Cujam?
About 249 light-years. The light we see today left it around the year 1780.
What color is Cujam?
Cujam looks blue-white. Its spectral type is B9pCr, which means a surface temperature of about 10,000 to 30,000 kelvin.
Can you see Cujam from the Northern Hemisphere?
Yes. From 40° N it rises and sets; at its highest it stands 64° high in the south.
Can you see Cujam from the Southern Hemisphere?
Yes. From 35° S it rises and sets; at its highest it stands 41° high in the north.
When is the best time to see Cujam?
In the evening in July, when it is highest at about 9 pm. It is 4.57 magnitude, the 973rd-brightest star in the night sky.