Universe Guide
HomeAliensConstellationsTelevision and Films ListFact ListGames ListWarcraftSearchTwitterFacebookComments

RR Pegasi

RR Pegasi Facts

Location of RR Pegasi

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 RR Pegasi, the location is 21 44 30.5871563864 and +25 00 26.213774130 .

Radial Velocity and Proper Motion of RR Pegasi

All stars like planets orbit round a central spot, in the case of planets, its the central star such as the Sun. In the case of a star, its the galactic centre. The constellations that we see today will be different than they were 50,000 years ago or 50,000 years from now. Proper Motion details the movements of these stars and are measured in milliarcseconds. The star is moving -8.91 miliarcseconds/year towards the north and -5.88 miliarcseconds/year east if we saw them in the horizon.

The Radial Velocity, that is the speed at which the star is moving away/towards the Sun is -30.00 km/s . When the value is negative then the star and the Sun are getting closer to one another, likewise, a positive number means that two stars are moving away. Its nothing to fear as the stars are so far apart, they won't collide in our life-time, if ever.

Physical Properties (Colour) of RR Pegasi

RR Pegasi has a spectral type of M6e: B. This means the star is a red star.

Distance to RR Pegasi

The Parallax of the star is given as 0.42 which gives a calculated distance to RR Pegasi of 7788.05 light years from the Earth or 2387.77 parsecs. It would take a spaceship travelling at the speed of light, 7788.05 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

The star is roughly 492,509,484.56 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.

Variable Type of RR Pegasi

The star is a pulsating Omicron Ceti 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.

Hide Explanations
Show GridLines

Additional RR Pegasi Facts and Figures

Visual Facts


Primary / Proper / Traditional NameRR Pegasi
Spectral TypeM6e: B
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeStar
ColourRed
GalaxyMilky Way
ConstellationPegasus
Right Ascension (R.A.)21 44 30.5871563864
Declination (Dec.)+25 00 26.213774130
Distance from Earth 0.42 Parallax (milliarcseconds)
 7788.05 Light Years
 2387.77 Parsecs
 492,509,484.56 Astronomical Units
Proper Motion Dec.-8.91 milliarcseconds/year
Proper Motion RA.-5.88 milliarcseconds/year
Radial Velocity-30.00 km/s

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Variable Star Details


Variable Star ClassPulsating
Variable Star TypeOmicron Ceti

Sources and Links


Sourcehttp://simbad.u-strasbg.fr/simbad/sim-id?Ident=rr%20pegasi

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.

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