Universe Guide
Search

EW Leonis

EW Leonis Facts

  • EW Leonis is a pulsating variable star that can be located in the constellation of Leo. The description is based on the spectral class.
  • EW Leonis is not part of the constellation outline but is within the borders of the constellation.
  • Based on the spectral type (M5) 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.
  • The star is calculated at being about -4530.05 light years away from us. Distance

EW Leonis's Alternative Names

HIP52553 is the reference name for the star in the Hipparcos Star Catalogue.

EW Leonis has alternative name(s) :- , EW Leo.

BD number is the number that the star was filed under in the Durchmusterung or Bonner Durchmusterung, a star catalogue that was put together by the Bonn Observatory between 1859 to 1903. The star's BD Number is BD+20 2516.

More details on objects' alternative names can be found at Star Names .

Location of EW Leonis

The location of the variable 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 EW Leonis, the location is 10h 44m 40.40 and +19° 25` 22.8 .

Physical Properties of EW Leonis

EW Leonis Temperature and Colour

Based on the star's spectral type of M5 , EW Leonis's colour and type is red variable star. The star has a B-V Colour Index of 1.37 which means the star's temperature is about 4,262 Kelvin. The temperature was calculated using information from Morgans @ Uni.edu.

EW Leonis Radius

EW Leonis Apparent and Absolute Magnitudes

EW Leonis has an apparent magnitude of 9.53 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 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 EW Leonis

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as -0.72000 which gave the calculated distance to EW Leonis as -4530.05 light years away from Earth or -1388.89 parsecs. If you want that in miles, it is about -26,630,466,871,790,412.48, based on 1 Ly = 5,878,625,373,183.61 miles.

Variable Type of EW Leonis

The star is a pulsating Semi-Regular Star w variable type which means that its size changes over time. The Variable Type is usually named after the first star of that type to be spotted. EW Leonis brightness ranges from a magnitude of 9.570 to a magnitude of 9.147 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 0.6 days (variability).

Source of Information

The source of the information if it has a Hip I.D. is from Simbad, the Hipparcos data library based at the University at Strasbourg, France. Hipparcos was a E.S.A. satellite operation launched in 1989 for four years. The items in red are values that I've calculated so they could well be wrong. Information regarding Metallicity and/or Mass is from the E.U. Exoplanets. The information was obtained as of 12th Feb 2017.

Hide Explanations
Show GridLines

Additional EW Leonis Facts and Figures

Visual Facts


Primary / Proper / Traditional NameEW Leonis
Alternative NamesHIP 52553, BD+20 2516, EW Leo
Spectral TypeM5
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeVariable Star
ColourRed
GalaxyMilky Way
ConstellationLeo
Visual / Apparent Magnitude9.53
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)10h 44m 40.40
Declination (Dec.)+19° 25` 22.8
Galactic Latitude59.97636932 degrees
Galactic Longitude220.96888892 degrees
Distance from Earth-0.72000 Parallax (milliarcseconds)
 -4530.05 Light Years
 -1388.89 Parsecs
 -286,477,130.55 Astronomical Units
B-V Index1.37

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Variable Star Details


Variable Star ClassPulsating
Variable Star TypeSemi-Regular Star w
Mean Variability Period in Days0.624
Variable Magnitude Range (Brighter - Dimmer)9.147 - 9.570

Estimated Calculated Facts


Effective Temperature4,262 Kelvin

Sources and Links


SIMBAD SourceLink

Related Stars


Comments and Questions

There's no register feature and no need to give an email address if you don't need to. All messages will be reviewed before being displayed. Comments may be merged or altered slightly such as if an email address is given in the main body of the comment.

You can decline to give a name which if that is the case, the comment will be attributed to a random star. A name is preferred even if its a random made up one by yourself.

   
x
This website is using cookies. More info. That's Fine