Universe Guide

DY Persei (Carbon Star) Facts

DY Persei Facts

  • DY Persei is a eruptive Carbon star that can be located in the constellation of Perseus. The description is based on the spectral class.
  • DY Persei is not part of the constellation outline but is within the borders of the constellation.
  • Based on the spectral type (C-R4+ B) of the star, the star's colour is carbon red .
  • The star is calculated at being about 3929.68 light years away from us. Distance

DY Persei's Alternative Names

DY Persei has alternative name(s) :- DY Per.

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

Location of DY Persei

The location of the Carbon 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 DY Persei, the location is 02 35 17.1273531147 and 2 35 17.1273531147 .

Radial Velocity and Proper Motion of DY Persei

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 -0.83 milliarcseconds/year towards the north and 2.34 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 -38.00000 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 of DY Persei

DY Persei Temperature and Colour

Based on the star's spectral type of C-R4+ B , DY Persei's colour and type is carbon red Carbon star. Based on the star's spectral, the stars temperature is between 2,400.00 and 3,700.00 degrees kelvin.

Distance to DY Persei

The Parallax of the star is given as 0.83000 which gives a calculated distance to DY Persei of 3929.68 light years from the Earth or 1204.82 parsecs. It is about 23,101,116,556,492,169 miles from Earth.

The star is roughly 248,510,232.22 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.

Travel Time to DY Persei

The time it will take to travel to this star is dependent on how fast you are going. U.G. has done some calculations as to how long it will take going at differing speeds. A note about the calculations, when I'm talking about years, I'm talking non-leap years only (365 days).

The New Horizons space probe is the fastest probe that we've sent into space at the time of writing. Its primary mission was to visit Pluto which at the time of launch (2006), Pluto was still a planet.

DescriptionSpeed (m.p.h.)Time (years)
Airbus A3807363,580,582,547.08
Speed of Sound (Mach 1)767.2693,434,660,796.47
Concorde (Mach 2)1,534.541,717,328,160.00
New Horizons Probe33,00079,857,841.05
Speed of Light670,616,629.003,929.68

Variable Type of DY Persei

The star is a eruptive R Coronae Borealis 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.

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Additional DY Persei Facts and Figures

Visual Facts

Primary / Proper / Traditional NameDY Persei
Alternative NamesDY Per
Spectral TypeC-R4+ B
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeCarbon Star
GalaxyMilky Way
Right Ascension (R.A.)02 35 17.1273531147
Declination (Dec.)2 35 17.1273531147
Distance from Earth0.83000 Parallax (milliarcseconds)
 3929.68 Light Years
 1204.82 Parsecs
 248,510,232.22 Astronomical Units
Proper Motion Dec.-0.82600 milliarcseconds/year
Proper Motion RA.2.33600 milliarcseconds/year
Radial Velocity-38.00000 km/s

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Variable Star Details

Variable Star ClassEruptive
Variable Star TypeR Coronae Borealis

Estimated Calculated Facts

Calculated Temperature Range2,400.00 - 3,700.00

Sources and Links


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