Universe Guide

V Cancri (S Star) Facts

V Cancri Facts

  • V Cancri is a pulsating S-Type Star that can be located in the constellation of Cancer. The description is based on the spectral class.
  • V Cancri 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.
  • The star is calculated at being about 122.71 light years away from us. Distance

V Cancri's Alternative Names

HIP40977 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD70276.

V Cancri has alternative name(s) :- V Cnc, V Cnc.

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+17 1825.

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

Location of V Cancri

The location of the S-Type 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 V Cancri, the location is 08h 21m 42.91 and +17° 17` 07.0 .

Physical Properties of V Cancri

V Cancri Colour

Based on the star's spectral type of Sevar The star has a B-V Colour Index of 2.08 which means the star's temperature is about 1,306 Kelvin. The temperature was calculated using information from Morgans @ Uni.edu.

V Cancri Radius

V Cancri estimated radius has been calculated as being 9.70 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 6,752,101.13.km. If you need the diameter of the star, you just need to multiple the radius by 2. The figure is derived at by using the formula from SDSS rather than peer reviewed papers. It has been known to produce widely incorrect figures.

V Cancri Apparent and Absolute Magnitudes

V Cancri has an apparent magnitude of 9.25 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 6.37 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 V Cancri

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 26.58000 which gave the calculated distance to V Cancri as 122.71 light years away from Earth or 37.62 parsecs. If you want that in miles, it is about 721,366,119,543,360.78, based on 1 Ly = 5,878,625,373,183.61 miles.

Travel Time to V Cancri

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 A380736111,808,921.94
Speed of Sound (Mach 1)767.269107,252,302.05
Concorde (Mach 2)1,534.5453,626,081.13
New Horizons Probe33,0002,493,677.77
Speed of Light670,616,629.00122.71

Variable Type of V Cancri

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. V Cancri brightness ranges from a magnitude of 11.823 to a magnitude of 7.340 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 277.8 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.

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Additional V Cancri Facts and Figures

Visual Facts

Primary / Proper / Traditional NameV Cancri
Alternative NamesV Cnc, HD 70276, HIP 40977, BD+17 1825, V Cnc
Spectral TypeSevar
Constellation's Main StarNo
Multiple Star SystemYes
Star TypeS-Type Star
GalaxyMilky Way
Absolute Magnitude 6.37
Visual / Apparent Magnitude9.25
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)08h 21m 42.91
Declination (Dec.)+17° 17` 07.0
Galactic Latitude27.49283855 degrees
Galactic Longitude206.63211679 degrees
Distance from Earth26.58000 Parallax (milliarcseconds)
 122.71 Light Years
 37.62 Parsecs
 7,759,627.94 Astronomical Units
B-V Index2.08
Radial Velocity-4.60000 ± 0.80 km/s

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Variable Star Details

Variable Star ClassPulsating
Variable Star TypeOmicron Ceti
Mean Variability Period in Days277.800
Variable Magnitude Range (Brighter - Dimmer)7.340 - 11.823

Estimated Calculated Facts

Radius (x the Sun)9.70
Effective Temperature1,306 Kelvin

Sources and Links

SIMBAD SourceLink

Multi-Star System

The star has been identified as being a multi-star system, one in which there is at least one star in close orbit to another star or two or more stars orbiting a central point. The stars may be of equal mass, unequal mass where one star is stronger than the other or be in groups orbiting a central point which doesn't necessarily have to be a star. More information can be found on my dedicated multiple star systems page. The source of the info is Simbad. The file is dated 2000 so any differences between this and any other source will be down to the actual source from where the information came from.

Proper Motion mas/yr
H.D. IdB.D. IdStar CodeMagnitudeR.A.Dec.SpectrumColourYear
70276+17 1825.0A3.0000010.00000M4Red

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