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Psi1 Piscium B - HD6457 - HIP5132

Psi1 Piscium B is a blue main sequence dwarf star that can be located in the constellation of Pisces. Psi1 Piscium B is the Bayer Classification for the star. HIP5132 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD6457. Psi1 Piscium B has alternative name(s), 74 Piscium , 74 Psc. Psi1 Piscium B is a multiple star system with 2 stars orbiting in its solar system.

Location of Psi1 Piscium B

The location of the star in the galaxy 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 Psi1 Piscium B, the location is 01h 05m 41.68 and +21d27`55.7 .

Proper Motion of Psi1 Piscium B

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 -011.88 ± 000.39 towards the north and 052.88 ± 000.68 east if we saw them in the horizon.

Psi1 Piscium B 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 24.0000000 that I have given is based on the Spectral Types page that I have found on the Internet. You might find a different figure, one that may have been calculated rather than generalised that I have done. The figure is always the amount times the luminosity of the Sun. It is an imprecise figure because of a number of factors including but not limited to whether the star is a variable star and distance.

Physical Properties (Colour, Temperature, Radius) of Psi1 Piscium B

Psi1 Piscium B has a spectral type of A0Vn. This means the star is a blue main sequence dwarf star. The star has a B-V Colour Index of -0.04 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 10,195 Kelvin.

Psi1 Piscium B has been calculated as 1.59 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 1,103,061.74.km.

The star has a companion star which is in orbit close by, it has at least the following companions in close orbit, HIP 4156.

Psi1 Piscium B Apparent and Absolute Magnitudes

Psi1 Piscium B has an apparent magnitude of 5.55 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 1.38 If you used the 2007 Parallax value, you would get an absolute magnitude of 0.88. 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 Psi1 Piscium B

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 14.67 which gave the calculated distance to Psi1 Piscium B as 222.33 light years away from Earth or 68.17 parsecs. It would take a spaceship travelling at the speed of light, 222.33 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 11.64 which put Psi1 Piscium B at a distance of 280.21 light years or 85.91 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.

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 Stellar Age, Metallicity or Mass is from the E.U. Exoplanets. The information was obtained as of 12th Feb 2017.

Psi1 Piscium B Facts

Alternative Names

Short Name74 Psc
Bayer DesignationPsi1 Piscium B
Alternative Name(s)74 Piscium
Hipparcos Library I.D.5132
Bonner DurchmusterungBD+20 157
Henry Draper Designation6457

Visual Facts

Star Typemain sequence dwarf star
Absolute Magnitude1.38 / 0.88
Apparent Magnitude5.55
Right Ascension (R.A.)01h 05m 41.68
Declination (Dec.)+21d27`55.7
1997 Distance from Earth14.67 Parallax (milliarcseconds)
 222.33 Light Years
 68.17 Parsecs
2007 Revised Distance from Earth11.64 Parallax (milliarcseconds)
 280.21 Light Years
 85.91 Parsecs
Proper Motion Dec.-11.88 ± 0.39 milliarcseconds/year
Proper Motion RA.52.88 ± 0.68 milliarcseconds/year
B-V Index-0.04
Spectral TypeA0Vn
Colour(A) blue

Companions (Multi-Star and Exoplanets) Facts

Stars in Solar System2
Companion StarsHIP 4156

Estimated Facts

Radius (x the Sun)1.59
Luminosity (x the Sun)24.0000000
Calculated Effective Temperature10,195 Kelvin

Sources and Links

SIMBAD SourceLink

Related Stars

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
6457+20 157.0B5.8000067.00000-5.00000A0White1832
C11.200001959

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