Star · ?
GJ 3087B
GJ 3087B is a main-sequence star of spectral type ? in the constellation Andromeda, 135.9 light-years from the Sun.
| Constellation | Andromeda |
|---|---|
| Distance | 135.9 light-years (41.7 pc) |
| Apparent magnitude | magnitude 14.35 |
| Absolute magnitude | magnitude 11.25 |
| Spectral type | ? |
| Surface temperature | 3,650 K |
| Luminosity | 0.0122 L☉ |
| Radius | 0.276 R☉ |
| Mass | 0.279 M☉ (estimated) |
| Right ascension (J2000) | 1h 20m 03.4s |
| Declination (J2000) | +38° 59′ 37″ |
| Space velocity (relative to the Sun) | 71.1 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 14.35. Visible from the whole Northern Hemisphere and south to latitude 51° S. North of latitude 51° N it never sets. It stands highest at midnight in October, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1890. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.4 million years.
The Sun seen from there
From a planet around GJ 3087B, the Sun would look like a star of magnitude 7.93, in the direction where our sky has the constellation Centaurus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- GJ 3086A 5.61 light-years
- HIP 5313 6.40 light-years
- HIP 6711 11.5 light-years
- HIP 6776 11.6 light-years
- 2MASS J01165802+4333081 12.0 light-years
- 2MASSW J0129122+351758 12.8 light-years
- GJ 3080 13.1 light-years
- HIP 4127 13.6 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.