Universe Guide

BD Cassiopeiae

BD Cassiopeiae Facts

  • BD Cassiopeiae is a variable star that can be located in the constellation of Cassiopeia. The description is based on the spectral class.
  • BD Cassiopeiae is not part of the constellation outline but is within the borders of the constellation.
  • The star can not be seen by the naked eye, you need a telescope to see it.
  • Using the most recent figures given by the 2007 Hipparcos data, the star is 1531.28 light years away from us. Distance

BD Cassiopeiae's Alternative Names

HIP796 is the reference name for the star in the Hipparcos Star Catalogue.

BD Cassiopeiae has alternative name(s) :- BD Cas, BD Cas.

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

Location of BD Cassiopeiae

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 BD Cassiopeiae, the location is 00h 09m 51.40 and +61° 30` 50.6 .

Radial Velocity and Proper Motion of BD Cassiopeiae

Proper Motion

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 -1.65 ± 1.52 milliarcseconds/year towards the north and -1.52 ± 1.92 milliarcseconds/year east if we saw them in the horizon.

Radial Velocity

The Radial Velocity, that is the speed at which the star is moving away/towards the Sun is -49.30000 km/s with an error of about 0.30 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.

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.

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Additional BD Cassiopeiae Facts and Figures

Visual Facts

Primary / Proper / Traditional NameBD Cassiopeiae
Alternative NamesBD Cas, HIP 796, BD Cas
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeVariable Star
GalaxyMilky Way
Absolute Magnitude 1.77 / 2.82
Visual / Apparent Magnitude11.18
Naked Eye VisibleRequires a 4.5 - 6 Inch Telescope - Magnitudes
Right Ascension (R.A.)00h 09m 51.40
Declination (Dec.)+61° 30` 50.6
Galactic Latitude-0.95842944 degrees
Galactic Longitude117.99429372 degrees
1997 Distance from Earth1.31000 Parallax (milliarcseconds)
 2489.80 Light Years
 763.36 Parsecs
2007 Distance from Earth2.13000 Parallax (milliarcseconds)
 1531.28 Light Years
 469.48 Parsecs
 96,836,526.47 Astronomical Units
Proper Motion Dec.-1.65000 ± 1.52000 milliarcseconds/year
Proper Motion RA.-1.52000 ± 1.92000 milliarcseconds/year
B-V Index0
Radial Velocity-49.30000 ± 0.30 km/s

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Variable Star Details

Mean Variability Period in Days3.652
Variable Magnitude Range (Brighter - Dimmer)11.044 - 11.382

Sources and Links

SIMBAD SourceLink

Related Stars

Comments and Questions

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