Star · M1V
WISE J203042.79+074934.7
WISE J203042.79+074934.7 is a main-sequence star of spectral type M1V in the constellation Delphinus, 31.7 light-years from the Sun.
| Constellation | Delphinus |
|---|---|
| Distance | 31.7 light-years (9.73 pc) |
| Apparent magnitude | magnitude 21.90 |
| Absolute magnitude | magnitude 21.96 |
| Spectral type | M1V |
| Surface temperature | 3,360 K |
| Luminosity | 1.04 × 10⁻⁶ L☉ |
| Radius | 0.003 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 20h 30m 43.0s |
| Declination (J2000) | +7° 49′ 34″ |
| Space velocity (relative to the Sun) | 31.1 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 21.90. Visible from the whole Northern Hemisphere and south to latitude 82° S. 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 1994. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 563 thousand years.
The Sun seen from there
From a planet around WISE J203042.79+074934.7, the Sun would look like a star of magnitude 4.77, in the direction where our sky has the constellation Hydra. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- GJ 1256 4.45 light-years
- Gl 791.2 7.40 light-years
- WISENF J193656.08+040801.2 7.89 light-years
- Gl 772 9.54 light-years
- GJ 1236 10.2 light-years
- WISEPC J205628.90+145953.3 10.4 light-years
- 2MASS J21392676+0220226 10.4 light-years
- 2MASS J19251275+0700362 10.8 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.