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S Piscis Austrini

S Piscis Austrini Facts

  • S Piscis Austrini is a pulsating star that can be located in the constellation of Piscis Austrinus. The description is based on the spectral class.
  • S Piscis Austrini is not part of the constellation outline but is within the borders of the constellation.
  • Based on the spectral type (M3e C) of the star, the star's colour is red .
  • The star is calculated at being about 1889.49 light years away from us. Distance

S Piscis Austrini's Alternative Names

The Id of the star in the Henry Draper catalogue is HD209400.

S Piscis Austrini has alternative name(s) :- S PsA.

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

Location of S Piscis Austrini

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 S Piscis Austrini, the location is 22 03 45.8354032750 and -28 03 04.013859129 .

Radial Velocity and Proper Motion of S Piscis Austrini

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 -13.19 milliarcseconds/year towards the north and 10.90 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 -92.00000 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 S Piscis Austrini

S Piscis Austrini Temperature and Colour

Based on the star's spectral type of M3e C , S Piscis Austrini's colour and type is red star. Based on the star's spectral, the stars temperature is between 2,400.00 and 3,700.00 degrees kelvin.

Distance to S Piscis Austrini

The Parallax of the star is given as 1.72620 which gives a calculated distance to S Piscis Austrini of 1889.49 light years from the Earth or 579.31 parsecs. It is about 11,107,603,856,376,699 miles from Earth.

The star is roughly 119,490,432.29 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 S Piscis Austrini

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)
Walking4316,780,853,582.30
Car12010,559,361,786.08
Airbus A3807361,721,635,073.82
Speed of Sound (Mach 1)767.2691,651,472,188.15
Concorde (Mach 2)1,534.54825,735,017.87
New Horizons Probe33,00038,397,679.22
Speed of Light670,616,629.001,889.49

Variable Type of S Piscis Austrini

The star is a pulsating Omicron Ceti variable type which means that its size changes over time. The Variable Type is usually named after the first star of that type to be spotted.

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Additional S Piscis Austrini Facts and Figures

Visual Facts


Primary / Proper / Traditional NameS Piscis Austrini
Alternative NamesS PsA, HD 209400
Spectral TypeM3e C
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeStar
ColourRed
GalaxyMilky Way
ConstellationPiscis Austrinus
Right Ascension (R.A.)22 03 45.8354032750
Declination (Dec.)-28 03 04.013859129
Distance from Earth1.72620 Parallax (milliarcseconds)
 1889.49 Light Years
 579.31 Parsecs
 119,490,432.29 Astronomical Units
Proper Motion Dec.-13.19000 milliarcseconds/year
Proper Motion RA.10.89500 milliarcseconds/year
Radial Velocity-92.00000 km/s
RedShift-0.0003070000

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Variable Star Details


Variable Star ClassPulsating
Variable Star TypeOmicron Ceti

Estimated Calculated Facts


Calculated Temperature Range2,400.00 - 3,700.00

Sources and Links


Sourcehttp://simbad.u-strasbg.fr/simbad/sim-id?Ident=S Piscis Austrini

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