Star · M4V
ULAS J102305.44+044739.2
ULAS J102305.44+044739.2 is a main-sequence star of spectral type M4V in the constellation Sextans, 140.2 light-years from the Sun.
| Constellation | Sextans |
|---|---|
| Distance | 140.2 light-years (43.0 pc) |
| Apparent magnitude | magnitude 25.89 |
| Absolute magnitude | magnitude 22.72 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 1.28 × 10⁻⁶ L☉ |
| Radius | 0.00426 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 10h 23m 05.6s |
| Declination (J2000) | +4° 47′ 40″ |
| Space velocity (relative to the Sun) | 16.9 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 25.89. Visible from the whole Northern Hemisphere and south to latitude 85° S. It stands highest at midnight in February, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1886. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.5 million years.
The Sun seen from there
From a planet around ULAS J102305.44+044739.2, the Sun would look like a star of magnitude 8.00, in the direction where our sky has the constellation Aquarius. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- SDSS J103405.67+035016.3 9.27 light-years
- WISEA J103602.80+030615.6 11.2 light-years
- ULAS J101821.78+072547.1 11.9 light-years
- HIP 51280 14.1 light-years
- SDSS J104625.76+042441.0 14.5 light-years
- GJ 3605 15.3 light-years
- HIP 52774 16.0 light-years
- HIP 49104 16.3 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.