Delta Pavonis (δ Pav, δ Pavonis) is a star in the southern circumpolar constellation of Pavo. It has an apparent visual magnitude of 3.56, making it a fourth-magnitude star that is visible to the naked eye from the southern hemisphere. Parallax measurements from the Hipparcos satellite yield an estimated distance of 19.92 light-years (6.11 parsecs) from Earth. This makes it one of the nearest bright stars to the Solar System.
It is a subgiant of spectral type G8 IV, meaning it is about to stop fusing hydrogen in its core and is starting the process of becoming a red giant. Because of that, Delta Pavonis is 22% brighter than the Sun even though the effective temperature of its outer atmosphere is lower, at 5,604 K. It has 99.1% of the Sun's mass and 122% of the Sun's radius. The surface convection zone extends downward to about 43.1% of the star's radius, but only contains 4.8% of the star's mass.
It has been identified by Maggie Turnbull and Jill Tarter of the SETI Institute as the "Best SETI target" among the list of the 100 nearest G-type stars. Properties in its favor include a high metallicity, minimal level of magnetic activity, low rotation rate, and kinematic membership in the thin disk population of the Milky Way. The lack of detected radial velocity variation suggests that there are no gas giant planets orbiting near the star's habitable zone, which may otherwise destabilize a hypothetical Earth-like planet in that orbital zone. As of 1999, no radio source of technological origin has been detected coming from this star. Delta Pavonis is the nearest solar analog that is not a member of a binary or multiple star system. This is a type of star that is a close photometric match to the Sun.
In Space Opera
- In Dune (1965) and other novels in the Dune universe by Frank Herbert. Caladan, the third planet of Delta Pavonis, is the ancestral fiefdom of House Atreides. A now destroyed planet, Harmonthep, existed in the system earlier.
- "The Big Broadcast of 2006" (1984–1988), episode of the television series The Transformers? directed by John Gibbs?. Delta Pavonis IV? is the home of a race of humanoid cats. A malfunctioning hypnotic Quintesson signal drives the cats to attack a neighbouring planet of humanoid dogs.
- Frontier: Elite II? (1993) and Frontier: First Encounters? (1995), computer games written by David Braben? et al. The Delta Pavonis system is home to a Federation world, a planet that, while it is habitable, is no Garden of Eden: its surface is completely covered by a harsh desert.
- Revelation Space? universe (2000–), novels and stories by Alastair Reynolds?. The planet Resurgam? and the neutron star Hades? are part of the Delta Pavonis system.
- Star Trek: Star Charts? (2002), fictional reference book by Geoffrey Mandel?. Delta Pavonis is orbited by the Federation planet Benzar?, homeworld of the Benzites?, a pisciform humanoid species. Benzites are highly resistant to poisons and other noxious substances. They can digest and derive nutrition from almost any organic compound.
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