Star · G2V
SWEEPS-4
SWEEPS-4 is a main-sequence star of spectral type G2V in the constellation Sagittarius, 27,700 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Sagittarius |
|---|---|
| Distance | 27,700 light-years (8,500 pc) |
| Apparent magnitude | magnitude 18.80 |
| Absolute magnitude | magnitude 4.15 |
| Spectral type | G2V |
| Surface temperature | 5,780 K |
| Luminosity | 2.02 L☉ |
| Radius | 1.18 R☉ |
| Mass | 1.24 M☉ (estimated) |
| Right ascension (J2000) | 17h 58m 53.9s |
| Declination (J2000) | −29° 11′ 21″ |
In the sky
A telescope is needed to see it: its apparent magnitude is 18.80. Visible from the whole Southern Hemisphere and north to latitude 61° N. South of latitude 61° S it never sets. It stands highest at midnight in June, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out 28 thousand years ago. At that time Homo sapiens was spreading out of Africa; there was no farming yet. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 492 million years.
The Sun seen from there
From a planet around SWEEPS-4, the Sun would look like a star of magnitude 19.48, in the direction where our sky has the constellation Auriga. It would be invisible to the naked eye.
Planets
- SWEEPS-4 b 4.2-day orbit · 9.08 R⊕
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.