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EBLM J0555–57Ab, Smallest Known Star in the Universe

EBLM J0555–57Ab Facts

Location of EBLM J0555–57Ab

The location of the 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 EBLM J0555–57Ab, the location is 05h 55m 32.68 and -57° 17` 26.0 .

Physical Properties (Colour) of EBLM J0555–57Ab

EBLM J0555–57Ab, Smallest Known Star in the Universe Colour and Temperature

EBLM J0555–57Ab has a spectral type of F8. This means the star is a blue to white star.

EBLM J0555–57Ab Apparent and Absolute Magnitudes

EBLM J0555–57Ab has an apparent magnitude of 9.98 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. Using the supplied Parallax value, you would get an absolute magnitude of 3.54 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 EBLM J0555–57Ab

The Parallax of the star is given as 5.16 which gives a calculated distance to EBLM J0555–57Ab of 632.10 light years from the Earth or 193.80 parsecs. It would take a spaceship travelling at the speed of light, 632.10 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

The star is roughly 39,973,840.91 Astronomical Units from the Earth/Sun give or take a few. An Astronomical Unit is the distance between Earth and the Sun. The number of A.U. is the number of times that the star is from the Earth compared to the Sun.

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Additional EBLM J0555–57Ab Facts and Figures

Visual Facts


Primary / Proper / Traditional NameEBLM J0555–57Ab, Smallest Known Star in the Universe
Spectral TypeF8
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeStar
ColourYellow - White
GalaxyMilky Way
ConstellationPictor
Visual / Apparent Magnitude9.98
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)05h 55m 32.68
Declination (Dec.)-57° 17` 26.0
Distance from Earth5.16 Parallax (milliarcseconds)
 632.10 Light Years
 193.80 Parsecs
 39,973,840.91 Astronomical Units
Eccentricity0.09
Inclination98.84
Argument Of Periastron-53.70

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Estimated Calculated Facts


Effective Temperature5,717 Kelvin

Related Stars


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