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HD 2952, HIP2611

HD 2952 is a orange to red giant star that can be located in the constellation of Cassiopeia. The description is based on the spectral class. The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it. HD 2952 has at least 1 Extrasolar Planets believed to be in orbit around the star.

HD 2952's Alternative Names

HIP2611 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD2952.

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+54 101.

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

Location of HD 2952

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 star is compared to the celestial equator and is expressed in degrees. For HD 2952, the location is 00h 33m 10.32 and +54° 53` 42.3 .

Proper Motion of HD 2952

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 -39.52 ± 0.27 miliarcseconds/year towards the north and 70.14 ± 0.45 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 us is -34.97000 km/s with an error of about 0.20 km/s .

HD 2952 Luminosity

Luminosity is the amount of energy that a star pumps out and its relative to the amount that our star, the Sun gives out. The figure of 68.84 that I have given is based on the value in the Simbad Hipparcos Extended Catalogue at the University of Strasbourg from 2012.

Physical Properties (Colour, Temperature, Mass) of HD 2952

HD 2952 has a spectral type of K0III. This means the star is a orange to red giant star. The star is 7,458.00 Parsecs from the Galactic Centre or terms of Light Years is 24,325.26 s. The star has a B-V Colour Index of 1 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 4,849 Kelvin.

HD 2952 Radius has been calculated as being 9.94 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 6,919,542.40.km. If you need the diameter of the star, you just need to multiple the radius by 2. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 9.85. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures. The star's solar mass is 2.54 times that of the Sun's. The Sun's Mass is 1,989,100,000,000,000,000,000 billion kg. which to calculate using this website is too large. To give idea of size, the Sun is 99.86% the mass of the solar system.

The star's metallicity is 0.000000, this value is the fractional amount of the star that is not Hydrogen (X) or Helium (Y). An older star would have a high metallicity whereas a new star would have a lower one.

HD 2952 Apparent and Absolute Magnitudes

HD 2952 has an apparent magnitude of 5.93 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. If you used the 1997 Parallax value, you would get an absolute magnitude of 0.62 If you used the 2007 Parallax value, you would get an absolute magnitude of 0.64. 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 HD 2952

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 8.68 which gave the calculated distance to HD 2952 as 375.76 light years away from Earth or 115.21 parsecs. It would take a spaceship travelling at the speed of light, 375.76 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

In 2007, Hipparcos data was revised with a new parallax of 8.76 which put HD 2952 at a distance of 372.33 light years or 114.16 parsecs. It should not be taken as though the star is moving closer or further away from us. It is purely that the distance was recalculated.

The star's Galacto-Centric Distance is 7,458.00 Parsecs or 24,325.26 Light Years. The Galacto-Centric Distance is the distance from the star to the Centre of the Galaxy which is Sagittarius A*.

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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HD 2952 Facts

Visual Facts

Primary / Proper / Traditional NameHD 2952
Alternative NamesHD 2952, HIP 2611, BD+54 101
Spectral TypeK0III
Multiple Star SystemNo / Unknown
Star TypeGiant Star
Colour orange to red
GalaxyMilky Way
Absolute Magnitude0.62 / 0.64
Visual / Apparent Magnitude5.93
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)00h 33m 10.32
Declination (Dec.)+54° 53` 42.3
Galactic Latitude-7.88 degrees
Galactic Longitude120.28 degrees
1997 Distance from Earth8.68 Parallax (milliarcseconds)
 375.76 Light Years
 115.21 Parsecs
2007 Distance from Earth8.76 Parallax (milliarcseconds)
 372.33 Light Years
 114.16 Parsecs
Galacto-Centric Distance24,325.26 Light Years / 7,458.00 Parsecs
Proper Motion Dec.-39.52 ± 0.27 milliarcseconds/year
Proper Motion RA.70.14 ± 0.45 milliarcseconds/year
B-V Index1.00
Radial Velocity-34.97 ± 0.20 km/s
Iron Abundance-0.09 ± 0.04 Fe/H
Semi-Major Axis5425.00
Stellar Luminosity (Lsun)68.84

Companions (Multi-Star and Exoplanets) Facts

Exoplanet Count1

Estimated Facts

Calculated Effective Temperature4,849 Kelvin
Mass Compared to the Sun2.54

Sources and Links

SIMBAD SourceLink

List of Extrasolar Planets orbiting HD 2952

NameStatusMass (Jupiters)Orbital Period (Days)EccentricityDiscoveredSemi-Major AxisPeriastronInclination
HD 2952 bConfirmed311.6000.12920131.264.0002013.000

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