Star · M4V
SDSS J143945.86+304220.6
SDSS J143945.86+304220.6 is a main-sequence star of spectral type M4V in the constellation Boötes, 104.4 light-years from the Sun.
| Constellation | Boötes |
|---|---|
| Distance | 104.4 light-years (32.0 pc) |
| Apparent magnitude | magnitude 24.72 |
| Absolute magnitude | magnitude 22.19 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 2.08 × 10⁻⁶ L☉ |
| Radius | 0.00543 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 14h 39m 46.0s |
| Declination (J2000) | +30° 42′ 21″ |
| Space velocity (relative to the Sun) | 45.9 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 24.72. Visible from the whole Northern Hemisphere and south to latitude 59° S. North of latitude 59° N it never sets. It stands highest at midnight in April, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1922. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.9 million years.
The Sun seen from there
From a planet around SDSS J143945.86+304220.6, the Sun would look like a star of magnitude 7.36, 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):
- 2MASSI J1430435+291540 6.22 light-years
- IRAC J142950.8+333011 6.37 light-years
- WISEA J143211.17+324433.8 7.97 light-years
- HIP 70500 8.94 light-years
- GJ 3844 9.56 light-years
- Gl 575.1 11.7 light-years
- SDSS J145502.93+261919.6 13.6 light-years
- HIP 74331 15.2 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.