Star · K0V
GJ 3872
GJ 3872 is a main-sequence star of spectral type K0V in the constellation Boötes, 251.9 light-years from the Sun.
| Other names | HIP 72830 |
|---|---|
| Constellation | Boötes |
| Distance | 251.9 light-years (77.2 pc) |
| Apparent magnitude | magnitude 7.96 |
| Absolute magnitude | magnitude 3.52 |
| Spectral type | K0V |
| Surface temperature | 5,010 K |
| Luminosity | 4.58 L☉ |
| Radius | 2.84 R☉ |
| Mass | 1.46 M☉ (estimated) |
| Right ascension (J2000) | 14h 53m 11.9s |
| Declination (J2000) | +28° 30′ 30″ |
| Space velocity (relative to the Sun) | 64.8 km/s |
In the sky
Too faint for the naked eye (magnitude 7.96); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 61° S. North of latitude 61° N it never sets. It stands highest at midnight in May, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1774. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.5 million years.
The Sun seen from there
From a planet around GJ 3872, the Sun would look like a star of magnitude 9.27, in the direction where our sky has the constellation Fornax. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.