Star · F5
GJ 3491
GJ 3491 is a main-sequence star of spectral type F5 in the constellation Cancer, 899.3 light-years from the Sun.
| Other names | HIP 40665 |
|---|---|
| Constellation | Cancer |
| Distance | 899.3 light-years (275.7 pc) |
| Apparent magnitude | magnitude 10.10 |
| Absolute magnitude | magnitude 2.90 |
| Spectral type | F5 |
| Surface temperature | 6,750 K |
| Luminosity | 5.89 L☉ |
| Radius | 1.77 R☉ |
| Mass | 1.56 M☉ (estimated) |
| Right ascension (J2000) | 8h 18m 03.6s |
| Declination (J2000) | +31° 16′ 41″ |
| Space velocity (relative to the Sun) | 76.6 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.10. Visible from the whole Northern Hemisphere and south to latitude 59° S. North of latitude 59° N it never sets. It stands highest at midnight in January, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1127. 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 GJ 3491, the Sun would look like a star of magnitude 12.03, in the direction where our sky has the constellation Sagittarius. It would be invisible to the naked eye.
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.