Universe Guide


65 Piscium, HD4757, HIP3885

65 Piscium is a blue to white giant star that can be located in the constellation of Pisces. 65 Piscium is the brightest star in Pisces based on the Hipparcos 2007 apparent magnitude. The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it. The star has an estimated age of 1.20 Billion of Years but could be as young as 1.10 to 1.30 according to Hipparcos.

HIP3885 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD4757.

Location of 65 Piscium

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 65 Piscium, the location is 00h 49m 53.11 and +27d42`37.1 .

Proper Motion of 65 Piscium

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 -10.15 ± 0.41 miliarcseconds/year towards the north and 88.17 ± 0.79 miliarcseconds/year east if we saw them in the horizon.

Physical Properties (Colour, Temperature, Age, Radius) of 65 Piscium

65 Piscium has a spectral type of F5III+.... This means the star is a blue to white giant star. The star is 7439.00000000 Parsecs from the Galactic Centre or terms of Light Years is 24263.2911601600000000s. The star has a B-V Colour Index of 0.3 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 7,218 Kelvin.

65 Piscium Radius has been calculated as being 4.92 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 3,424,127.69.km. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 4.11. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures. The star's Iron Abundance is 0.06 with an error value of 0.15 Fe/H with the Sun has a value of 1 to put it into context.

The stars age according to Hipparcos data files put the star at an age of about 1.20 Billion years old but could be between 1.10 and 1.30 Billion years old. In comparison, the Sun's age is about 4.6 Billion Years Old.

65 Piscium Apparent and Absolute Magnitudes

65 Piscium 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 0.42 If you used the 2007 Parallax value, you would get an absolute magnitude of 0.81. 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 65 Piscium

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 9.40 which gave the calculated distance to 65 Piscium as 346.98 light years away from Earth or 106.38 parsecs. It would take a spaceship travelling at the speed of light, 346.98 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 11.29 which put 65 Piscium at a distance of 288.90 light years or 88.57 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 7,439.00 Parsecs or 24,263.29 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.

65 Piscium Facts

Alternative Names

Traditional/Proper Name65 Piscium
Flamsteed Name65 Piscium
Flamsteed Short Name65 Psc
Hipparcos Library I.D.3885
Bonner DurchmusterungBD+26 131
Henry Draper Designation4757

Visual Facts

Star Typegiant star
Age1.20 Billion Years Old
Age Range1.10 - 1.30 Billion Years Old
Absolute Magnitude0.42 / 0.81
Visual / Apparent Magnitude5.55
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)00h 49m 53.11
Declination (Dec.)+27d42`37.1
Galactic Latitude-35.16 degrees
Galactic Longitude122.51 degrees
1997 Distance from Earth9.40 Parallax (milliarcseconds)
 346.98 Light Years
 106.38 Parsecs
2007 Revised Distance from Earth11.29 Parallax (milliarcseconds)
 288.90 Light Years
 88.57 Parsecs
Galacto-Centric Distance24,263.29 Light Years / 7,439.00 Parsecs
Proper Motion Dec.-10.15 ± 0.41 milliarcseconds/year
Proper Motion RA.88.17 ± 0.79 milliarcseconds/year
B-V Index0.30
Radial Velocity6.80 ± 2.90 km/s
Iron Abundance0.06 ± 0.15 Fe/H
Spectral TypeF5III+...
Colour(F) blue to white

Estimated Facts

Calculated Effective Temperature7,218 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
4758+26 131.0A6.3000091.00000-13.00000F0Yellow/White

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