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HIP 25322, HD34450

HIP 25322 is a red variable star that can be located in the constellation of Camelopardalis. 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.

HIP 25322's Alternative Names

HIP25322 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD34450.

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+73 285.

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

Location of HIP 25322

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 HIP 25322, the location is 05h 24m 59.43 and +73° 42` 25.9 .

Proper Motion of HIP 25322

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 -2.14 ± 0.32 miliarcseconds/year towards the north and -8.51 ± 0.38 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 18.34000 km/s with an error of about 0.26 km/s .

Physical Properties (Colour, Temperature) of HIP 25322

HIP 25322 has a spectral type of M0. This means the star is a red variable star. The star is 7,743.00 Parsecs from the Galactic Centre or terms of Light Years is 25,254.83 s. The star has a B-V Colour Index of 1.73 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 3,339 Kelvin.

HIP 25322 Radius has been calculated as being 54.41 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 37,859,007.77.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 69.45. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

HIP 25322 Apparent and Absolute Magnitudes

HIP 25322 has an apparent magnitude of 6.48 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 -1.45 If you used the 2007 Parallax value, you would get an absolute magnitude of -1.98. 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 HIP 25322

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 2.60 which gave the calculated distance to HIP 25322 as 1254.47 light years away from Earth or 384.62 parsecs. It would take a spaceship travelling at the speed of light, 1254.47 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 2.03 which put HIP 25322 at a distance of 1606.72 light years or 492.61 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 7,743.00 Parsecs or 25,254.83 Light Years. The Galacto-Centric Distance is the distance from the star to the Centre of the Galaxy which is Sagittarius A*. HIP 25322 brightness ranges from a magnitude of 6.582 to a magnitude of 6.522 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 0.0 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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HIP 25322 Facts

Visual Facts


 HIP 25322
Alternative NamesHD 34450, HIP 25322, BD+73 285
Spectral TypeM0
Multiple Star SystemNo / Unknown
Star TypeVariable Star
Colour red
GalaxyMilky Way
ConstellationCamelopardalis
Absolute Magnitude-1.45 / -1.98
Visual / Apparent Magnitude6.48
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)05h 24m 59.43
Declination (Dec.)+73° 42` 25.9
Galactic Latitude20.23 degrees
Galactic Longitude139.07 degrees
1997 Distance from Earth2.60 Parallax (milliarcseconds)
 1254.47 Light Years
 384.62 Parsecs
2007 Distance from Earth2.03 Parallax (milliarcseconds)
 1606.72 Light Years
 492.61 Parsecs
Galacto-Centric Distance25,254.83 Light Years / 7,743.00 Parsecs
Proper Motion Dec.-2.14 ± 0.32 milliarcseconds/year
Proper Motion RA.-8.51 ± 0.38 milliarcseconds/year
B-V Index1.73
Radial Velocity18.34 ± 0.26 km/s
Eccentricity0.41
Semi-Major Axis11994.00

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Variable Star Details


Mean Variability Period in Days0.044
Variable Magnitude Range (Brighter - Dimmer)6.522 - 6.582

Estimated Facts


Calculated Effective Temperature3,339 Kelvin

Sources and Links


SIMBAD SourceLink

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