Star · G3
Mazaalai
Mazaalai is a giant star of spectral type G3 in the constellation Ursa Major, 926.8 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | HAT-P-21 |
|---|---|
| Constellation | Ursa Major |
| Distance | 926.8 light-years (284.2 pc) |
| Apparent magnitude | magnitude 11.58 |
| Absolute magnitude | magnitude 4.31 |
| Spectral type | G3 |
| Surface temperature | 5,590 K |
| Luminosity | 1.52 L☉ |
| Radius | 1.21 R☉ |
| Mass | 1.24 M☉ |
| Age | 10.2 billion years |
| Metallicity [Fe/H] | 0.01 |
| Right ascension (J2000) | 11h 25m 06.0s |
| Declination (J2000) | +41° 01′ 41″ |
| Space velocity (relative to the Sun) | 55.0 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.58. Visible from the whole Northern Hemisphere and south to latitude 49° S. North of latitude 49° N it never sets. It stands highest at midnight in March, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1099. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 16 million years.
The Sun seen from there
From a planet around Mazaalai, the Sun would look like a star of magnitude 12.10, in the direction where our sky has the constellation Grus. It would be invisible to the naked eye.
Planets
- HAT-P-21 b 4.12-day orbit · 12.4 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.