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HD 200494

HD 200494 Facts

HD 200494's Alternative Names

The Id of the star in the Henry Draper catalogue is HD200494.

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

Location of HD 200494

The location of the giant 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 200494, the location is 21 03 39.2751825551 and +02 55 36.388902674 .

Radial Velocity and Proper Motion of HD 200494

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 -92.15 milliarcseconds/year towards the north and -107.78 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 5.50 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 (Colour) of HD 200494

HD 200494 Colour and Temperature

HD 200494 has a spectral type of K1III C. This means the star is a orange to red giant star.

Distance to HD 200494

The Parallax of the star is given as 7.28 which gives a calculated distance to HD 200494 of 447.92 light years from the Earth or 137.33 parsecs. It is about 2,633,153,877,156,398.11 miles from Earth.

The star is roughly 28,326,148.46 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.

Time to Travel to HD 200494

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 21,942,948,976,303.32 hours or 2,504,902,851.18 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 200494 then it would take 79,792,541,732.01 hours / 9,108,737.64 years to get there. Speed Ref: N.A.S.A.

It would to take a spaceship journey travelling at the speed of light, 447.92 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

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Additional HD 200494 Facts and Figures

Visual Facts

Primary / Proper / Traditional NameHD 200494
Alternative NamesHD 200494
Spectral TypeK1III C
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeGiant Star
ColourOrange to Red
GalaxyMilky Way
Right Ascension (R.A.)21 03 39.2751825551
Declination (Dec.)+02 55 36.388902674
Distance from Earth7.28 Parallax (milliarcseconds)
 447.92 Light Years
 137.33 Parsecs
 28,326,148.46 Astronomical Units
Proper Motion Dec.-92.15 milliarcseconds/year
Proper Motion RA.-107.78 milliarcseconds/year
Radial Velocity5.50 km/s

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Sources and Links


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Comments and Questions

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