Kepler-45, formerly known as KOI-254, is a
star
A star is a luminous spheroid of plasma (physics), plasma held together by Self-gravitation, self-gravity. The List of nearest stars and brown dwarfs, nearest star to Earth is the Sun. Many other stars are visible to the naked eye at night sk ...
in the northern
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 first constellati ...
of
Cygnus. It is located at the
celestial coordinates
In astronomy, coordinate systems are used for specifying positions of celestial objects (satellites, planets, stars, galaxies, etc.) relative to a given reference frame, based on physical reference points available to a situated observer (e. ...
: right ascension , declination .
With an
apparent visual magnitude
Apparent magnitude () is a measure of the brightness of a star, astronomical object or other celestial objects like artificial satellites. Its value depends on its intrinsic luminosity, its distance, and any extinction of the object's light ca ...
of 16.88,
[ this star is too faint to be seen with the naked eye.
The star is exhibiting strong ]starspot
Starspots are stellar phenomena, so-named by analogy with sunspots.
Spots as small as sunspots have not been detected on other stars, as they would cause undetectably small fluctuations in brightness. The commonly observed starspots are in gene ...
activity, with 4.1% of its surface covered by starspots.
Planetary system
The "Hot Jupiter" class planet Kepler-45b, discovered in February 2011,
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See also
*NGTS-1b
NGTS-1b is a confirmed hot Jupiter-sized extrasolar planet orbiting NGTS-1, a red dwarf star about half the mass and radius of the Sun, every 2.65 days. The NGTS-1 system is about 716 light-years from Earth in the Columba constellation.
Discover ...
References
{{Stars of Cygnus
Cygnus (constellation)
M-type main-sequence stars
254
Year 254 ( CCLIV) was a common year starting on Sunday of the Julian calendar. At the time, it was known as the Year of the Consulship of Valerianus and Gallienus (or, less frequently, year 1007 ''Ab urbe condita''). The denomination 254 for th ...
Planetary transit variables
Planetary systems with one confirmed planet
J19312949+4103513