Star in the constellation Equuleus
! style="text-align: center; background-color: #FFFFC0;" colspan="2" | Observation dataEpoch J2000.0      Equinox J2000.0 (ICRS)
! style="text-align:left" | Constellation
! style="text-align:left" | Right ascension
! style="text-align:left" | Declination
! style="text-align:left" | Apparent magnitude (V)
! style="background-color: #FFFFC0; text-align: center;" colspan="2"| Characteristics
! style="text-align:left" | Evolutionary stage
! style="text-align:left" | Spectral type
! style="text-align:left" | U−B 
! style="text-align:left" | B−V 
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HD 200661 (HR 8067) is a solitary star in the equatorial constellation Equuleus. It has an apparent magnitude of 6.41, placing it near the max naked eye visibility. The star is situated at a distance of 430 light years but is approaching with a heliocentric radial velocity of .
HD 200661 has a stellar classification of K0 III, indicating that the object is an early K-type giant star that is on the horizontal branch. It has an angular diameter of , which yields a diameter 10.62 times that of the Sun at its estimated distance. At present HD 200661 has 1.74 times the Sun’s mass, and shines at 51.3 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,740 K, giving it a yellow-orange glow.
References.
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