20h17m 31.328s[1]
+66° 51′ 13.28″[1]
5.93[2]
Characteristics
G3 V[3]
U−B color index
+0.06[2]
B−V color index
+0.58[2]
Radial velocity (Rv)
−4.7[4] km/s
Proper motion (μ)
RA: +468.684 mas/yr[1]
Dec.: +297.589 mas/yr[1]
Parallax (π)
57.02 ± 0.02 ly
(17.481 ± 0.006 pc)
Absolute magnitude (MV)
4.65[2]
Details
Surface gravity (log g)
Metallicity [Fe/H]
Rotational velocity (v sin i)
1.3[7] km/s
Database references
HD 193664 a star in the northern constellationofDraco. HD 193664 is its Henry Draper Catalogue designation. With an apparent magnitude of 5.93,[2] according to the Bortle Scale it is visible to the naked eye from suburban skies. Parallax measurements yield an estimated distance of 57 light years.[1] It has a relatively large proper motion of 0.558 arc seconds per year across the sky,[9] and is drifting closer to the Sun with a radial velocity of −4.7 km/s.[4]
This star is considered a solar analog—meaning that it is photometrically analogous to the Sun—and it displays no significant variability.[10] It is a G-type main sequence star with a stellar classification of G3V.[3] Both the mass and radius of HD 193664 differ from those of the Sun by just a few percent, although it has a somewhat lower metallicity.[4] It may be around the same age as the Sun, being an estimated 3.2 billion years old.[5] The effective temperature of the stellar atmosphere is 5,922 K,[5] giving it the yellow-hued glow of a G-type star.[11]
HD 193664 has been examined for signs of an infrared excess that could indicate the presence of a circumstellar disk of dust, but none has been found (as of 2012).[12] This is member of the thin disk population of stars that lie near the galactic plane.[4]
Other
Other
