Star · M4V
WISEA J193054.55-205949.4
WISEA J193054.55-205949.4 is a main-sequence star of spectral type M4V in the constellation Sagittarius, 30.7 light-years from the Sun.
| Constellation | Sagittarius |
|---|---|
| Distance | 30.7 light-years (9.40 pc) |
| Apparent magnitude | magnitude 27.30 |
| Absolute magnitude | magnitude 27.43 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 1.67 × 10⁻⁸ L☉ |
| Radius | 4.86 × 10⁻⁴ R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 19h 30m 55.3s |
| Declination (J2000) | −20° 59′ 40″ |
| Space velocity (relative to the Sun) | 66.9 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 27.30. Visible from the whole Southern Hemisphere and north to latitude 69° N. South of latitude 69° S it never sets. It stands highest at midnight in July, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1995. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 544 thousand years.
The Sun seen from there
From a planet around WISEA J193054.55-205949.4, the Sun would look like a star of magnitude 4.70, in the direction where our sky has the constellation Gemini. It would be visible 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.