Star · ?
Gl 784.2B
Gl 784.2B is a white dwarf of spectral type ? in the constellation Aquila, 74.9 light-years from the Sun.
| Constellation | Aquila |
|---|---|
| Distance | 74.9 light-years (22.9 pc) |
| Apparent magnitude | magnitude 15.72 |
| Absolute magnitude | magnitude 13.92 |
| Spectral type | ? |
| Surface temperature | 8,000 K |
| Luminosity | 2.45 × 10⁻⁴ L☉ |
| Radius | 0.012 R☉ |
| Mass | 0.6 M☉ (estimated) |
| Right ascension (J2000) | 20h 13m 55.4s |
| Declination (J2000) | +6° 42′ 35″ |
| Space velocity (relative to the Sun) | 69.1 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 15.72. Visible from the whole Northern Hemisphere and south to latitude 83° S. It stands highest at midnight in July, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1951. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.3 million years.
The Sun seen from there
From a planet around Gl 784.2B, the Sun would look like a star of magnitude 6.63, 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):
- Gl 784.2A 0.04 light-years
- GJ 4144 3.43 light-years
- WISE J201404.13+042408.5 4.28 light-years
- GJ 4149 9.83 light-years
- 2MASS J20360316+1051295 10.4 light-years
- GJ 1242 11.4 light-years
- GJ 4136 12.0 light-years
- GJ 4160A 12.1 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.