HD 33564
F-type star with a dubious planet detection.
HD 33564 is a single star in Camelopardalis that hosts an exoplanetary companion. With an apparent visual magnitude of 5.08, it is faintly visible to the naked eye. The system lies 68 light years from the Sun and is a candidate member of the Ursa Major Moving Group.
Quick Facts
- Apparent visual magnitude
- 5.08
- Distance
- 68 light years
- Radial velocity
- −11 km/s
- Stellar classification
- F7V
- Age
- about two billion years
- Projected rotational velocity
- 14.3 km/s
- Radius
- 1.5 times the Sun
- Mass
- 1.3 times the Sun
Facts from the source article.
Did You Know?
- HD 33564 is chromospherically quiet.
- The star is drifting closer to the Sun at −11 km/s.
Possible planetary system
In September 2005, radial velocity measurements from the ELODIE spectrograph indicated a massive planet on an eccentric orbit around HD 33564. An infrared excess at 60 μm was initially thought to suggest a circumstellar disk, but that emission is now attributed to a background galaxy. No subsequent study has confirmed the planet, and a 2025 assessment classified it as a dubious detection.
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