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HIP 2689

Proper NameNone
Bayer DesignationNone
Flamsteed NumberNone
HR (BSC)None
Other DesignationsHIP 2689, BD +46 110
Right Ascension0h 34m 9s
Declination+47° 43' 17"
Distancec.1,800 light years
c.600 parsecs
MagnitudeApparent: +9.30
Absolute: +1.13
Spectral ClassK2III orange giant
Optimum VisibilityOctober (Usually visible from northern latitudes)
NotesA faint and distant orange giant star near the southern borders of Cassiopeia, HIP 2689 lies in the same general area of the sky as two dwarf elliptical galaxies designated C17 and C18. At an estimated distance of some 1,400 light years, this star shines at a apparent magnitude of just +9.30 (that is, it is some 20,000 times fainter than Sirius, the brightest star in the sky).

An faint orange star in the southern regions of Cassiopeia, near that constellation's border with Andromeda. It was catalogued by the Hipparcos mission, whose parallax measurements suggested that it lay some 1,400 light years from the Sun. The more recent Gaia measurement suggests that it lies even further than this from the Solar System, at a distance approacing 1,800 light years (though measuring parallax at such distances is extremely difficult, and these figures each incorporate a substantial margin of error).

Imagery provided by Aladin sky atlas

The star itself is some thirty times more luminous than the Sun, but its huge distance gives it an apparent magnitude of +9.3: far, far too faint to see with the naked eye. Physically the star is a K-type orange giant, comparable with (for example) Pollux in Gemini. If it lay at a similar distance to Pollux, HIP 2689 would shine just as brightly in Earth's sky.