Universe Guide

35 Geminorum

35 Geminorum Facts

  • 35 Geminorum is a giant star that can be located in the constellation of Gemini. The description is based on the spectral class.
  • 35 Geminorum is a main star of the constellation outline.
  • Based on the spectral type (K3III) of the star, the star's colour is orange to red .
  • The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it.
  • Using the most recent figures given by the 2007 Hipparcos data, the star is 1763.05 light years away from us. Distance

35 Geminorum's Alternative Names

The Id of the star in the Yale Bright Star Catalogue is HR2525. HIP32814 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD49738.

Flamsteed designations are named after the creator, Sir John Flamsteed. Sir John named the stars in the constellation with a number and its latin name, this star's Flamsteed designation is 35 Geminorum. The Flamsteed name can be shortened to 35 Gem.

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+13 1434.

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

Location of 35 Geminorum

The location of the giant 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 object is compared to the celestial equator and is expressed in degrees. For 35 Geminorum, the location is 06h 50m 25.50 and +13° 24` 47.5 .

Radial Velocity and Proper Motion of 35 Geminorum

Proper Motion

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 -6.66 ± 0.20 milliarcseconds/year towards the north and -2.09 ± 0.37 milliarcseconds/year east if we saw them in the horizon.

Radial Velocity

The Radial Velocity, that is the speed at which the star is moving away/towards the Sun is 28.76000 km/s with an error of about 0.20 km/s . When the value is negative then the star and the Sun are getting closer to one another, likewise, a positive number means that two stars are moving away. Its nothing to fear as the stars are so far apart, they won't collide in our life-time, if ever.

Physical Properties of 35 Geminorum

35 Geminorum Colour and Temperature

Based on the star's spectral type of K3III , 35 Geminorum's colour and type is orange to red giant star. The star has a B-V Colour Index of 1.32 which means the star's temperature is about 4,289 Kelvin. The temperature was calculated using information from Morgans @ Uni.edu.

35 Geminorum Radius

35 Geminorum estimated radius has been calculated as being 57.04 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 39,691,878.75.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 66.714551319591140860906452972. The figure is derived at by using the formula from SDSS rather than peer reviewed papers. It has been known to produce widely incorrect figures.

35 Geminorum Iron Abundance

35 Geminorum Iron Abundance is -0.04 with an error value of 0.06 Fe/H with the Sun has a value of 1 to put it into context. The value comes from the Hipparcos Extended Catalog.

35 Geminorum Apparent and Absolute Magnitudes

35 Geminorum has an apparent magnitude of 5.68 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 -2.64 If you used the 2007 Parallax value, you would get an absolute magnitude of -2.98. 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 35 Geminorum

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 2.17000 which gave the calculated distance to 35 Geminorum as 1503.06 light years away from Earth or 460.83 parsecs. If you want that in miles, it is about 8,835,926,653,417,356.85, based on 1 Ly = 5,878,625,373,183.61 miles.

In 2007, Hipparcos data was revised with a new parallax of 1.85000 which put 35 Geminorum at a distance of 1763.05 light years or 540.54 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.

Using the 2007 distance, the star is roughly 111,493,601.47 Astronomical Units from the Earth/Sun give or take a few. An Astronomical Unit is the distance between Earth and the Sun. The number of A.U. is the number of times that the star is from the Earth compared to the Sun.

Travel Time to 35 Geminorum

The time it will take to travel to this star is dependent on how fast you are going. U.G. has done some calculations as to how long it will take going at differing speeds. A note about the calculations, when I'm talking about years, I'm talking non-leap years only (365 days).

The New Horizons space probe is the fastest probe that we've sent into space at the time of writing. Its primary mission was to visit Pluto which at the time of launch (2006), Pluto was still a planet.

DescriptionSpeed (m.p.h.)Time (years)
Airbus A3807361,606,427,510.54
Speed of Sound (Mach 1)767.2691,540,959,751.74
Concorde (Mach 2)1,534.54770,478,871.69
New Horizons Probe33,00035,828,201.45
Speed of Light670,616,629.001,763.05

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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Additional 35 Geminorum Facts and Figures

Visual Facts

Primary / Proper / Traditional Name35 Geminorum
Alternative NamesHD 49738, HIP 32814, HR 2525, 35 Gem, BD+13 1434
Spectral TypeK3III
Constellation's Main StarYes
Multiple Star SystemNo / Unknown
Star TypeGiant Star
ColourOrange to Red
GalaxyMilky Way
Absolute Magnitude -2.64 / -2.98
Visual / Apparent Magnitude5.68
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)06h 50m 25.50
Declination (Dec.)+13° 24` 47.5
Galactic Latitude5.85142789 degrees
Galactic Longitude200.83862199 degrees
1997 Distance from Earth2.17000 Parallax (milliarcseconds)
 1503.06 Light Years
 460.83 Parsecs
2007 Distance from Earth1.85000 Parallax (milliarcseconds)
 1763.05 Light Years
 540.54 Parsecs
 111,493,601.47 Astronomical Units
Proper Motion Dec.-6.66000 ± 0.20000 milliarcseconds/year
Proper Motion RA.-2.09000 ± 0.37000 milliarcseconds/year
B-V Index1.32
Radial Velocity28.76000 ± 0.20 km/s
Iron Abundance-0.0400 ± 0.06 Fe/H

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Estimated Calculated Facts

Radius (x the Sun)66.71
Effective Temperature4,289 Kelvin

Sources and Links

SIMBAD SourceLink

Gemini Main Stars

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