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NML Cygni (Supergiant Star) Star Facts

NML Cygni Facts

  • NML Cygni is a supergiant star that can be located in the constellation of Cygnus. The description is based on the spectral class.
  • NML Cygni is not part of the constellation outline but is within the borders of the constellation.
  • Based on the spectral type (M6I) of the star, the star's colour is red .
  • The star can not be seen by the naked eye, you need a telescope to see it.
  • NML Cygni has a radius that is 1,640.00 times bigger than the Suns. Radius

Information on NML Cygni

NML Cyngi is one of the biggest stars in The Milky Way. If it was in our Solar System and was in the place of The Sun, its edge would be out past the orbit of Jupiter and we`d be sitting inside the hot ball of gas and fire. It is a competitor to the biggest star in the galaxy with the Scutum star known as UY Scuti. The star was discovered in 1965 by Neugebauer, Martz, and Leighton and whose surname initials give the star its name. The star`s size is about between 1,642 and 2,775 times the radius of our Sun.

Location of NML Cygni

The location of the supergiant star in the night sky is determined by the Right Ascension (R.A.) and Declination (Dec.), these are equivalent to the Longitude and Latitude on the Earth. The Right Ascension is how far expressed in time (hh:mm:ss) the star is along the celestial equator. If the R.A. is positive then its eastwards. The Declination is how far north or south the object is compared to the celestial equator and is expressed in degrees. For NML Cygni, the location is 20h 46m 25.6 and +40 ° 06` 59.4 .

Physical Properties of NML Cygni

NML Cygni Colour and Temperature

Based on the star's spectral type of M6I , NML Cygni's colour and type is red supergiant star. Based on the star's spectral, the stars temperature is between 2,400.00 and 3,700.00 degrees kelvin.

NML Cygni Radius

NML Cygni Radius has been calculated as being 1,640.00 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 1,141,112,000.00.km. If you need the diameter of the star, you just need to multiple the radius by 2.

NML Cygni Apparent and Absolute Magnitudes

NML Cygni has an apparent magnitude of 16.60 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. Magnitude, whether it be apparent/visual or absolute magnitude is measured by a number, the smaller the number, the brighter the Star is. Our own Sun is the brightest star and therefore has the lowest of all magnitudes, -26.74. A faint star will have a high number.

Distance to NML Cygni

NML Cygni is an estimated 5,300.00 light years from our Solar System (Earth and Sun). It would take a spaceship 5,300.00 years travelling at the speed of light to get there. We don't have a space ship that can travel that distance or at that speed yet.

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Additional NML Cygni Facts and Figures

Visual Facts


Primary / Proper / Traditional NameNML Cygni
Spectral TypeM6I
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star Type very luminous Supergiant Star
ColourRed
GalaxyMilky Way
ConstellationCygnus
Visual / Apparent Magnitude16.60
Naked Eye VisibleRequires 8m Telescope - Magnitudes
Right Ascension (R.A.)20h 46m 25.6
Declination (Dec.)+40 ° 06` 59.4
Distance from the Sun / Earth5,300.00 Light Years

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Estimated Calculated Facts


Radius (x the Sun)1,640.00
Calculated Temperature Range2,400.00 - 3,700.00

Location of NML Cygni in Cygnus


NML Cygni Location in Cygnus

The map was generated using Night Vision, an awesome free application by Brian Simpson.

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