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XZ Apodis, HIP72721

XZ Apodis is a pulsating variable star that can be located in the constellation of Apus. The description is based on the spectral class. XZ Apodis is not part of the constellation but is within the borders of the constellation.

The star can not be seen by the naked eye, you need a telescope to see it.

XZ Apodis's Alternative Names

HIP72721 is the reference name for the star in the Hipparcos Star Catalogue.

XZ Apodis has alternative name(s) :- , XZ Aps.

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

Location of XZ Apodis

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 star is compared to the celestial equator and is expressed in degrees. For XZ Apodis, the location is 14h 52m 05.48 and -79° 40` 46.7 .

Radial Velocity and Proper Motion of XZ Apodis

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 11.73 ± 2.70 miliarcseconds/year towards the north and -16.54 ± 3.28 miliarcseconds/year east if we saw them in the horizon.

The Radial Velocity, that is the speed at which the star is moving away/towards the Sun is 202.00 km/s with an error of about 3.00 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.

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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XZ Apodis Facts

Visual Facts


Primary / Proper / Traditional NameXZ Apodis
Alternative NamesHIP 72721, XZ Aps
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeVariable Star
GalaxyMilky Way
ConstellationApus
Absolute Magnitude 1.71 / 5.13
Visual / Apparent Magnitude12.45
Naked Eye VisibleRequires a 4.5 - 6 Inch Telescope - Magnitudes
Right Ascension (R.A.)14h 52m 05.48
Declination (Dec.)-79° 40` 46.7
Galactic Latitude-18.10 degrees
Galactic Longitude308.37 degrees
1997 Distance from Earth0.71 Parallax (milliarcseconds)
 4593.85 Light Years
 1408.45 Parsecs
2007 Distance from Earth3.43 Parallax (milliarcseconds)
 950.91 Light Years
 291.55 Parsecs
Proper Motion Dec.11.73 ± 2.70 milliarcseconds/year
Proper Motion RA.-16.54 ± 3.28 milliarcseconds/year
B-V Index-99.00
Radial Velocity202.00 ± 3.00 km/s
Iron Abundance-1.23 ± 9.99 Fe/H

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Variable Star Details


Variable Star ClassPulsating
Variable Star TypeRR Lyrae type with asymmetric light curves
Mean Variability Period in Days0.587
Variable Magnitude Range (Brighter - Dimmer)11.776 - 13.092

Sources and Links


SIMBAD SourceLink

Related Stars


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