Star · M4V
CFBDS J212243.69+042941.9
CFBDS J212243.69+042941.9 is a main-sequence star of spectral type M4V in the constellation Equuleus, 179.4 light-years from the Sun.
| Constellation | Equuleus |
|---|---|
| Distance | 179.4 light-years (55.0 pc) |
| Apparent magnitude | magnitude 25.33 |
| Absolute magnitude | magnitude 21.63 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 3.51 × 10⁻⁶ L☉ |
| Radius | 0.00705 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 21h 22m 43.7s |
| Declination (J2000) | +4° 29′ 42″ |
| Space velocity (relative to the Sun) | 31.4 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 25.33. Visible from the whole Northern Hemisphere and south to latitude 86° S. It stands highest at midnight in August, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1847. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.2 million years.
The Sun seen from there
From a planet around CFBDS J212243.69+042941.9, the Sun would look like a star of magnitude 8.53, in the direction where our sky has the constellation Hydra. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 105639 9.09 light-years
- Kitalpha 11.9 light-years
- HIP 106707 12.9 light-years
- 4 Peg 15.1 light-years
- HIP 104047 15.4 light-years
- HIP 104138 15.7 light-years
- ULAS J211317.05+001840.7 16.1 light-years
- HIP 107181 16.7 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.