Star · M4V
SDSS J154502.87+061807.8
SDSS J154502.87+061807.8 is a main-sequence star of spectral type M4V in the constellation Serpens, 172.9 light-years from the Sun.
| Constellation | Serpens |
|---|---|
| Distance | 172.9 light-years (53.0 pc) |
| Apparent magnitude | magnitude 21.87 |
| Absolute magnitude | magnitude 18.25 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 7.88 × 10⁻⁵ L☉ |
| Radius | 0.0334 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 15h 45m 02.9s |
| Declination (J2000) | +6° 18′ 08″ |
| Space velocity (relative to the Sun) | 37.0 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 21.87. Visible from the whole Northern Hemisphere and south to latitude 84° S. It stands highest at midnight in May, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1853. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.1 million years.
The Sun seen from there
From a planet around SDSS J154502.87+061807.8, the Sun would look like a star of magnitude 8.45, in the direction where our sky has the constellation Eridanus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- ULAS J154427.34+081926.6 8.86 light-years
- HIP 75964 11.6 light-years
- HIP 76058 12.7 light-years
- HIP 75971 13.6 light-years
- ULAS J152912.23+092228.5 15.0 light-years
- ULAS J153653.80+015540.6 15.7 light-years
- HIP 76963 16.4 light-years
- HIP 77226 17.3 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.