Universe Guide

59 Orionis

59 Orionis Facts

59 Orionis's Alternative Names

The Id of the star in the Yale Bright Star Catalogue is HR2100. HIP28271 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD40372.

59 Orionis has alternative name(s) :- V1004 Ori, V1004 Ori.

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 59 Orionis with it shortened to 59 Ori.

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+01 1171.

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

Location of 59 Orionis

The location of the variable 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 59 Orionis, the location is 05h 58m 24.44 and +01° 50` 13.7 .

Radial Velocity and Proper Motion of 59 Orionis

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 -8.45 ± 0.18 milliarcseconds/year towards the north and 6.42 ± 0.38 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 45.30 km/s with an error of about 3.70 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.

59 Orionis 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 45.42 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 59 Orionis

59 Orionis Colour and Temperature

59 Orionis has a spectral type of A5me del Del. This means the star is a blue - white variable star. The star has a B-V Colour Index of 0.22 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 7,253 Kelvin.

59 Orionis Radius

Radius has been calculated as being 4.24 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 2,953,557.34.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 4.38. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

59 Orionis Apparent and Absolute Magnitudes

59 Orionis has an apparent magnitude of 5.89 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 0.72 If you used the 2007 Parallax value, you would get an absolute magnitude of 0.65. 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 59 Orionis

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 9.24 which gave the calculated distance to 59 Orionis as 352.99 light years away from Earth or 108.23 parsecs. If you want that in miles, it is 2,142,347,444,749,299.35.

In 2007, Hipparcos data was revised with a new parallax of 8.95 which put 59 Orionis at a distance of 364.43 light years or 111.73 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 23,045,806.22 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.

The star's Galacto-Centric Distance is 7,499.00 Parsecs or 24,458.99 Light Years. The Galacto-Centric Distance is the distance from the star to the Centre of the Galaxy which is Sagittarius A*.

Time to Travel to 59 Orionis

A note about the calculations, when I'm talking about years, I'm talking non-leap years only (365 days).

If you were to drive there at about 120 m.p.h. in a car with an infinity engine so you didn't have to pull over for petrol, it would take you 17,292,466,420,667.32 hours or 1,974,025,847.11 years.

At the time of writing, the fastest probe so far created is the New Horizon probe which is travelling at a speed of 33,000 m.p.h. If the probe was travelling to 59 Orionis then it would take 62,881,696,075.15 hours / 7,178,275.81 years to get there. Speed Ref: N.A.S.A.

It would to take a spaceship journey travelling at the speed of light, 352.99 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

Variable Type of 59 Orionis

The star is a eclipsing binary sys Beta Lyrae (Sheliak) variable type which means that its size changes over time. The Variable Type is usually named after the first star of that type to be spotted. 59 Orionis brightness ranges from a magnitude of 6.053 to a magnitude of 5.909 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 2.7 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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Additional 59 Orionis Facts and Figures

Visual Facts

Primary / Proper / Traditional Name59 Orionis
Alternative NamesV1004 Ori, HD 40372, HIP 28271, HR 2100, 59 Ori, BD+01 1171, V1004 Ori
Spectral TypeA5me del Del
Constellation's Main StarNo
Multiple Star SystemYes
Star TypeVariable Star
GalaxyMilky Way
Absolute Magnitude 0.72 / 0.65
Visual / Apparent Magnitude5.89
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)05h 58m 24.44
Declination (Dec.)+01° 50` 13.7
Galactic Latitude-10.92 degrees
Galactic Longitude205.14 degrees
1997 Distance from Earth9.24 Parallax (milliarcseconds)
 352.99 Light Years
 108.23 Parsecs
2007 Distance from Earth8.95 Parallax (milliarcseconds)
 364.43 Light Years
 111.73 Parsecs
 23,045,806.22 Astronomical Units
Galacto-Centric Distance24,458.99 Light Years / 7,499.00 Parsecs
Proper Motion Dec.-8.45 ± 0.18 milliarcseconds/year
Proper Motion RA.6.42 ± 0.38 milliarcseconds/year
B-V Index0.22
Radial Velocity45.30 ± 3.70 km/s
Semi-Major Axis7025.00
Stellar Luminosity (Lsun)45.42

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Variable Star Details

Variable Star ClassEclipsing binary sys
Variable Star TypeBeta Lyrae (Sheliak)
Mean Variability Period in Days2.741
Variable Magnitude Range (Brighter - Dimmer)5.909 - 6.053

Estimated Calculated Facts

Radius (x the Sun)4.38
Effective Temperature7,253 Kelvin

Sources and Links

SIMBAD SourceLink

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
40372+01 1171.0A6.10000-4.000002.00000A5White

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