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HomeFactsConstellationsCanis Minor

Delta1 Canis Minoris, 7 Canis Minoris, HD59881, HIP36641, HR2880

Delta1 Canis Minoris is a blue to white giant star that can be located in the constellation of CanisMinor. The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it.

Delta1 Canis Minoris's Alternative Names

Delta1 Canis Minoris is the Bayer Classification for the star. The Id of the star in the Yale Bright Star Catalogue is HR2880. HIP36641 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD59881.

Flamsteed designations are named after the creator, Sir John Flamsteed. Sir John numbered the stars in the constellation with a number and the latin name, this star's Flamsteed designation is 7 Canis Minoris with it shortened to 7 CMi.

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+02 1691.

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

Location of Delta1 Canis Minoris

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 Delta1 Canis Minoris, the location is 07h 32m 05.95 and +01° 54` 52.1 .

Proper Motion of Delta1 Canis Minoris

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 -1.10 ± 0.13 miliarcseconds/year towards the north and -1.64 ± 0.27 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 29.10000 km/s with an error of about 2.80 km/s .

Delta1 Canis Minoris 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 357.5700000 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) of Delta1 Canis Minoris

Delta1 Canis Minoris has a spectral type of F0III. This means the star is a blue to white giant star. The star is 7586.00000000 Parsecs from the Galactic Centre or terms of Light Years is 24742.7512758400000000s. The star has a B-V Colour Index of 0.23 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 7,593 Kelvin.

Delta1 Canis Minoris Radius has been calculated as being 11.70 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 8,139,121.36.km. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 11.27. 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 0.16 with an error value of 0.04 Fe/H with the Sun has a value of 1 to put it into context.

Delta1 Canis Minoris Apparent and Absolute Magnitudes

Delta1 Canis Minoris has an apparent magnitude of 5.24 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 -1.68 If you used the 2007 Parallax value, you would get an absolute magnitude of -1.60. 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 Delta1 Canis Minoris

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 4.14 which gave the calculated distance to Delta1 Canis Minoris as 787.83 light years away from Earth or 241.55 parsecs. It would take a spaceship travelling at the speed of light, 787.83 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 4.29 which put Delta1 Canis Minoris at a distance of 760.29 light years or 233.10 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 7,586.00 Parsecs or 24,742.75 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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Delta1 Canis Minoris Facts

Visual Facts

Alternative NamesHD 59881, HIP 36641, HR 2880, 7 Canis Minoris, 7 CMi, BD+02 1691
Star TypeGiant Star
GalaxyMilky Way
ConstellationCanis Minor
Absolute Magnitude-1.68 / -1.60
Visual / Apparent Magnitude5.24
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)07h 32m 05.95
Declination (Dec.)+01° 54` 52.1
Galactic Latitude9.92 degrees
Galactic Longitude215.88 degrees
1997 Distance from Earth4.14 Parallax (milliarcseconds)
 787.83 Light Years
 241.55 Parsecs
2007 Revised Distance from Earth4.29 Parallax (milliarcseconds)
 760.29 Light Years
 233.10 Parsecs
Galacto-Centric Distance24,742.75 Light Years / 7,586.00 Parsecs
Proper Motion Dec.-1.10 ± 0.13 milliarcseconds/year
Proper Motion RA.-1.64 ± 0.27 milliarcseconds/year
B-V Index0.23
Radial Velocity29.10 ± 2.80 km/s
Iron Abundance0.16 ± 0.04 Fe/H
Semi-Major Axis7615.00
Stellar Luminosity (Lsun)357.57
Spectral TypeF0III
Associated / Clustered StarsDelta2 Canis Minoris
Delta3 Canis Minoris
Colour(F) blue to white

Estimated Facts

Calculated Effective Temperature7,593 Kelvin

Sources and Links

SIMBAD SourceLink

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