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HIP 81070, HD149069

HIP 81070 Facts

  • HIP 81070 is a subgiant star that can be located in the constellation of Scorpius. The description is based on the spectral class.
  • HIP 81070 is not part of the constellation outline but is within the borders of the constellation.
  • Based on the spectral type (A0IV/V) of the star, the star's colour is blue - white .
  • The star can not be seen by the naked eye, you need a telescope to see it.
  • The star is calculated at being about 326163.34 light years away from us. Distance

HIP 81070's Alternative Names

HIP81070 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD149069.

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

Location of HIP 81070

The location of the subgiant 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 HIP 81070, the location is 16h 33m 31.53 and -27° 06` 02.5 .

Physical Properties of HIP 81070

HIP 81070 Colour and Temperature

Based on the star's spectral type of A0IV/V , HIP 81070's colour and type is blue - white subgiant star. The star has a B-V Colour Index of 0.21 which means the star's temperature is about 7,708 Kelvin. The temperature was calculated using information from Morgans @ Uni.edu.

HIP 81070 Radius

HIP 81070 estimated radius has been calculated as being 416.02 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 289,466,083.29.km. If you need the diameter of the star, you just need to multiple the radius by 2. 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.

HIP 81070 Apparent and Absolute Magnitudes

HIP 81070 has an apparent magnitude of 10.50 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. Using the supplied Parallax value, you would get an absolute magnitude of -9.5 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 HIP 81070

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 0.01000 which gave the calculated distance to HIP 81070 as 326163.34 light years away from Earth or 100000 parsecs. If you want that in miles, it is about 1,917,392,086,326,312,670.86, based on 1 Ly = 5,878,625,373,183.61 miles.

Travel Time to HIP 81070

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)
Walking454,682,639,893,545.22
Car1201,822,754,663,118.17
Airbus A380736297,188,260,291.01
Speed of Sound (Mach 1)767.269285,076,758,704.16
Concorde (Mach 2)1,534.54142,538,193,578.65
New Horizons Probe33,0006,628,198,774.98
Speed of Light670,616,629.00326,163.34

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 HIP 81070 Facts and Figures

Visual Facts


Primary / Proper / Traditional NameHIP 81070
Alternative NamesHD 149069, HIP 81070
Spectral TypeA0IV/V
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeSubgiant Star
ColourBlue
GalaxyMilky Way
ConstellationScorpius
Absolute Magnitude -9.5
Visual / Apparent Magnitude10.50
Naked Eye VisibleRequires a 4.5 - 6 Inch Telescope - Magnitudes
Right Ascension (R.A.)16h 33m 31.53
Declination (Dec.)-27° 06` 02.5
Galactic Latitude13.93220014 degrees
Galactic Longitude352.05161673 degrees
Distance from Earth0.01000 Parallax (milliarcseconds)
 326163.34 Light Years
 100000 Parsecs
 20,626,336,898.40 Astronomical Units
B-V Index0.21

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Estimated Calculated Facts


Radius (x the Sun)416.02
Effective Temperature7,708 Kelvin

Sources and Links


SIMBAD SourceLink

Related Stars


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