Star · M2.5 V
HD 180617
HD 180617 is a main-sequence star of spectral type M2.5 V in the constellation Aquila, 19.3 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | Gl 752A · HIP 94761 |
|---|---|
| Constellation | Aquila |
| Distance | 19.3 light-years (5.92 pc) |
| Apparent magnitude | magnitude 9.12 |
| Absolute magnitude | magnitude 10.26 |
| Spectral type | M2.5 V |
| Surface temperature | 3,530 K |
| Luminosity | 0.0324 L☉ |
| Radius | 0.481 R☉ |
| Mass | 0.484 M☉ |
| Metallicity [Fe/H] | -0.04 |
| Right ascension (J2000) | 19h 16m 55.3s |
| Declination (J2000) | +5° 10′ 08″ |
| Space velocity (relative to the Sun) | 53.9 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 9.12. Visible from the whole Northern Hemisphere and south to latitude 85° 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 2007. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 342 thousand years.
The Sun seen from there
From a planet around HD 180617, the Sun would look like a star of magnitude 3.69, in the direction where our sky has the constellation Monoceros. It would be visible to the naked eye.
Planets
- HD 180617 b 106-day orbit · 3.53 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Gl 752B 0.01 light-years
- Altair 3.85 light-years
- 70 Oph 6.20 light-years
- Gl 702B 6.20 light-years
- WISE J192841.35+235604.9 7.46 light-years
- Gl 791.2 8.66 light-years
- Gl 701 9.62 light-years
- WISENF J193656.08+040801.2 9.64 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.