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HD 170777

HD 170777 Facts

HD 170777's Alternative Names

The Id of the star in the Henry Draper catalogue is HD170777.

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

Location of HD 170777

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 170777, the location is 18 23 31.1021109959 and +74 10 04.729380347 .

Proper Motion of HD 170777

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 7.40 milliarcseconds/year towards the north and 0.34 milliarcseconds/year east if we saw them in the horizon. . 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 (Colour) of HD 170777

HD 170777 Colour and Temperature

HD 170777 has a spectral type of A2 D~. This means the star is a blue - white star.

Distance to HD 170777

The Parallax of the star is given as 2.87 which gives a calculated distance to HD 170777 of 1135.98 light years from the Earth or 348.29 parsecs. It would take a spaceship travelling at the speed of light, 1135.98 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

The star is roughly 71,839,468.78 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.

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Additional HD 170777 Facts and Figures

Visual Facts


Primary / Proper / Traditional NameHD 170777
Alternative NamesHD 170777
Spectral TypeA2 D~
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeStar
ColourBlue
GalaxyMilky Way
ConstellationDraco
Right Ascension (R.A.)18 23 31.1021109959
Declination (Dec.)+74 10 04.729380347
Distance from Earth2.87 Parallax (milliarcseconds)
 1135.98 Light Years
 348.29 Parsecs
 71,839,468.78 Astronomical Units
Proper Motion Dec.7.40 milliarcseconds/year
Proper Motion RA.0.34 milliarcseconds/year

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Sources and Links


Sourcehttp://simbad.u-strasbg.fr/simbad/sim-id?Ident=hd%20170777

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