94 Aquarii (abbreviated 94 Aqr) is a
triple star[ system in the equatorial ]constellation
A constellation is an area on the celestial sphere in which a group of visible stars forms Asterism (astronomy), a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object.
The origins of the e ...
of Aquarius. ''94 Aquarii'' is the Flamsteed designation. The brightest member has an apparent visual magnitude of 5.19,[ making it visible to the naked eye. The ]parallax
Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight and is measured by the angle or semi-angle of inclination between those two lines. Due to foreshortening, nearby objects ...
measured by the Gaia spacecraft yields a distance estimate of around from Earth.spectroscopic binary
A binary star is a system of two star, stars that are gravity, gravitationally bound to and in orbit around each other. Binary stars in the night sky that are seen as a single object to the naked eye are often resolved using a telescope as separa ...
with an orbital period of 6.321 years, a moderate orbital eccentricity
In astrodynamics, the orbital eccentricity of an astronomical object is a dimensionless parameter that determines the amount by which its orbit around another body deviates from a perfect circle. A value of 0 is a circular orbit, values betwee ...
of 0.173,[ The primary component of this pair has a ]stellar classification
In astronomy, stellar classification is the classification of stars based on their stellar spectrum, spectral characteristics. Electromagnetic radiation from the star is analyzed by splitting it with a Prism (optics), prism or diffraction grati ...
of G8.5 IV,[ with the luminosity class of IV indicating this is a subgiant star. At an ]angular separation
Angular distance \theta (also known as angular separation, apparent distance, or apparent separation) is the angle between the two sightlines, or between two point objects as viewed from an observer.
Angular distance appears in mathematics (in pa ...
of 13.0 arcsecond
A minute of arc, arcminute (arcmin), arc minute, or minute arc, denoted by the symbol , is a unit of angular measurement equal to of one degree. Since one degree is of a turn (or complete rotation), one minute of arc is of a turn. The na ...
s from this pair is a magnitude 7.52[ K-type main sequence star with a classification of K2 V.][
]
References
External links
Image 94 Aquarii
{{DEFAULTSORT:94 Aquarii
Aquarius (constellation)
Spectroscopic binaries
Aquarii, 094
G-type subgiants
K-type main-sequence stars
8866
115126
Durchmusterung objects
219834
Triple star systems
0894.2