Star · G3V
HD 199509
HD 199509 is a main-sequence star of spectral type G3V in the constellation Octans, 79.4 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | HIP 104436 |
|---|---|
| Constellation | Octans |
| Distance | 79.4 light-years (24.4 pc) |
| Apparent magnitude | magnitude 6.98 |
| Absolute magnitude | magnitude 5.05 |
| Spectral type | G3V |
| Surface temperature | 5,800 K |
| Luminosity | 0.824 L☉ |
| Radius | 0.92 R☉ |
| Mass | 1.04 M☉ |
| Age | 1.6 billion years |
| Metallicity [Fe/H] | -0.31 |
| Right ascension (J2000) | 21h 09m 20.9s |
| Declination (J2000) | −82° 01′ 38″ |
| Space velocity (relative to the Sun) | 38.3 km/s |
In the sky
Too faint for the naked eye (magnitude 6.98); binoculars will find it. Visible from the whole Southern Hemisphere and north to latitude 8° N. South of latitude 8° S it never sets.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1947. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.4 million years.
The Sun seen from there
From a planet around HD 199509, the Sun would look like a star of magnitude 6.76, in the direction where our sky has the constellation Camelopardalis. It would be invisible to the naked eye.
Planets
- HD 199509 b 99.6-day orbit · 7.43 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HD 207496 7.33 light-years
- WISE J235447.80-814044.9 8.34 light-years
- GJ 4317 9.36 light-years
- SIPS J2150-7520B 9.62 light-years
- HIP 110719 11.1 light-years
- HIP 110712 11.1 light-years
- HIP 107022 12.8 light-years
- HIP 64690 13.1 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.