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HD 135235

HD 135235 Facts

HD 135235's Alternative Names

HIP74696 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD135235.

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

Location of HD 135235

The location of the 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 135235, the location is 15h 15m 53.66 and -48° 04` 25.1 .

Radial Velocity and Proper Motion of HD 135235

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 -8.44 ± 0.24 milliarcseconds/year towards the north and 5.18 ± 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 -9.40 km/s with an error of about 1.30 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.

HD 135235 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 8.52 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 HD 135235

HD 135235 Colour and Temperature

HD 135235 has a spectral type of A3m. This means the star is a blue - white star. The star has a B-V Colour Index of 0.21 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 7,325 Kelvin.

HD 135235 Radius

Radius has been calculated as being 1.93 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 1,341,989.47.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 1.86. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

HD 135235 Apparent and Absolute Magnitudes

HD 135235 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 2.39 If you used the 2007 Parallax value, you would get an absolute magnitude of 2.47. 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 135235

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 19.32 which gave the calculated distance to HD 135235 as 168.82 light years away from Earth or 51.76 parsecs. If you want that in miles, it is 956,275,989,455,776.21.

In 2007, Hipparcos data was revised with a new parallax of 20.05 which put HD 135235 at a distance of 162.67 light years or 49.88 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 10,288,416.84 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 7,359.00 Parsecs or 24,002.36 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 HD 135235

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 8,270,246,129,173.79 hours or 944,092,023.88 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 HD 135235 then it would take 30,073,622,287.90 hours / 3,433,061.91 years to get there. Speed Ref: N.A.S.A.

It would to take a spaceship journey travelling at the speed of light, 168.82 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

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 135235 Facts and Figures

Visual Facts


Primary / Proper / Traditional NameHD 135235
Alternative NamesHD 135235, HIP 74696
Spectral TypeA3m
Constellation's Main StarNo
Multiple Star SystemYes
Star TypeStar
ColourBlue
GalaxyMilky Way
ConstellationLupus
Absolute Magnitude 2.39 / 2.47
Visual / Apparent Magnitude5.96
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)15h 15m 53.66
Declination (Dec.)-48° 04` 25.1
Galactic Latitude8.11 degrees
Galactic Longitude326.37 degrees
1997 Distance from Earth19.32 Parallax (milliarcseconds)
 168.82 Light Years
 51.76 Parsecs
2007 Distance from Earth20.05 Parallax (milliarcseconds)
 162.67 Light Years
 49.88 Parsecs
 10,288,416.84 Astronomical Units
Galacto-Centric Distance24,002.36 Light Years / 7,359.00 Parsecs
Proper Motion Dec.-8.44 ± 0.24 milliarcseconds/year
Proper Motion RA.5.18 ± 0.38 milliarcseconds/year
B-V Index0.21
Radial Velocity-9.40 ± 1.30 km/s
Eccentricity0.19
Semi-Major Axis8908.00
Stellar Luminosity (Lsun)8.52

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Estimated Calculated Facts


Radius (x the Sun)1.86
Effective Temperature7,325 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
135235-47 9824.2A6.200009.00000-25.00000A2White
B10.400009.00000-25.000001933

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