Universe Guide

HD 39286

HD 39286 Facts

  • HD 39286 is a main sequence star that can be located in the constellation of Orion. The description is based on the spectral class.
  • HD 39286 is not part of the constellation outline but is within the borders of the constellation.
  • Based on the spectral type (B9V + G) of the star, the star's colour is blue .
  • 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 1120.84 light years away from us. Distance

HD 39286's Alternative Names

HIP27747 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD39286.

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+19 1110.

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

Location of HD 39286

The location of the main sequence 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 HD 39286, the location is 05h 52m 23.41 and +19° 52` 04.3 .

Radial Velocity and Proper Motion of HD 39286

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 -3.25 ± 0.45 milliarcseconds/year towards the north and -3.76 ± 0.67 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 3.80000 km/s with an error of about 2.30 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 HD 39286

HD 39286 Temperature and Colour

Based on the star's spectral type of B9V + G , HD 39286's colour and type is blue main sequence star. The star has a B-V Colour Index of 0.54 which means the star's temperature is about 6,122 Kelvin. The temperature was calculated using information from Morgans @ Uni.edu.

HD 39286 Radius

HD 39286 estimated radius has been calculated as being 22.45 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 15,617,890.93.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 18.328783503769447065450101519. 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.

HD 39286 Apparent and Absolute Magnitudes

HD 39286 has an apparent magnitude of 5.96 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 -2.16 If you used the 2007 Parallax value, you would get an absolute magnitude of -1.72. 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 HD 39286

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 2.38000 which gave the calculated distance to HD 39286 as 1370.43 light years away from Earth or 420.17 parsecs. If you want that in miles, it is about 8,056,244,570,172,014.65, based on 1 Ly = 5,878,625,373,183.61 miles.

In 2007, Hipparcos data was revised with a new parallax of 2.91000 which put HD 39286 at a distance of 1120.84 light years or 343.64 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 70,880,344.12 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 HD 39286

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 A3807361,021,268,943.54
Speed of Sound (Mach 1)767.269979,648,522.81
Concorde (Mach 2)1,534.54489,823,623.01
New Horizons Probe33,00022,777,392.20
Speed of Light670,616,629.001,120.84
HD 39286 brightness ranges from a magnitude of 6.086 to a magnitude of 6.055 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 0.0 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 HD 39286 Facts and Figures

Visual Facts

Primary / Proper / Traditional NameHD 39286
Alternative NamesHD 39286, HIP 27747, BD+19 1110
Spectral TypeB9V + G
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star Type Main Sequence Dwarf Star
GalaxyMilky Way
Absolute Magnitude -2.16 / -1.72
Visual / Apparent Magnitude5.96
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)05h 52m 23.41
Declination (Dec.)+19° 52` 04.3
Galactic Latitude-3.34266223 degrees
Galactic Longitude188.57392766 degrees
1997 Distance from Earth2.38000 Parallax (milliarcseconds)
 1370.43 Light Years
 420.17 Parsecs
2007 Distance from Earth2.91000 Parallax (milliarcseconds)
 1120.84 Light Years
 343.64 Parsecs
 70,880,344.12 Astronomical Units
Proper Motion Dec.-3.25000 ± 0.45000 milliarcseconds/year
Proper Motion RA.-3.76000 ± 0.67000 milliarcseconds/year
B-V Index0.54
Radial Velocity3.80000 ± 2.30 km/s

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Variable Star Details

Mean Variability Period in Days0.029
Variable Magnitude Range (Brighter - Dimmer)6.055 - 6.086

Estimated Calculated Facts

Radius (x the Sun)18.33
Effective Temperature6,122 Kelvin

Sources and Links

SIMBAD SourceLink

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Comments and Questions

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