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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:44  
clear_day Transit: 11:48  
SunsetSet: 15:51 south
sleep NighttimeWhat's Visible Now?
All Constellations » Piscis Austrinus » 

21 Piscis Austrini

Altitude: -16.3°   Azimuth: 242.7°   Direction: West-South-West

21 Piscis Austrini is a giant star in the constellation of Piscis Austrinus.

21 Piscis Austrini visual magnitude is 5.97. Because of its reltive faintness, 21 Piscis Austrini should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about 21 Piscis Austrini:

5.97
Giant

21 Piscis Austrini is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -16.3°
Azimuth: 242.7°
Direction: West-South-West

Celestial coordinates and finder chart of 21 Piscis Austrini

21 Piscis Austrini is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 21 Piscis Austrini are provided in the following table:

22h 51m 20s
-29° 32’ 09”
20.59°
-63.54°
Piscis Austrinus

The simplified sky map below shows the position of 21 Piscis Austrini in the sky:

Finder chart 21 Piscis Austrini star
Simplified finder chart for 21 Piscis Austrini.

Visibility of 21 Piscis Austrini from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's 21 Piscis Austrini rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 119.5°
Max altitude: 9.0°
Azimuth: 240.5°

Digitized Sky Survey image of 21 Piscis Austrini

The image below is a photograph of 21 Piscis Austrini from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of 21 Piscis Austrini is -0.004 arcsec per year in Right Ascension and -0.011 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 21 Piscis Austrini star
DSS2 image of 21 Piscis Austrini. The red arrow shows the motion of 21 Piscis Austrini during the next 10000 years (-0.67 arcmin in Right Ascension and -1.83 arcmin in declination);

Distance of 21 Piscis Austrini from the Sun and relative movement

21 Piscis Austrini is distant 370.45 light years from the Sun and it is moving far from the Sun at the speed of 5 kilometers per second.

113.64 pc
370.45 ly
5 km/s
-0.004 arcsec/year
-0.011 arcsec/year

Spectral properties of 21 Piscis Austrini

21 Piscis Austrini belongs to spectral class G8 and has a luminosity class of III corresponding to a giant star.

0.69
G8III
4970K

The red dot in the diagram below shows where 21 Piscis Austrini is situated in the HertzsprungÔÇôRussell diagram.

HR Diagram
H-R diagram showing the position of 21 Piscis Austrini. Attribution: Richard Powell / CC BY-SA

Alternative designations of 21 Piscis Austrini

21 Piscis Austrini
SAO191444
SAO191444