21 Virginis

Altitude: 24.3° Azimuth: 148.9° Direction: South-South-East

21 Virginis is a hypergiant star in the constellation of Virgo.

21 Virginis visual magnitude is 5.48. Because of its reltive faintness, 21 Virginis 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 Virginis:

Color of 21 Virginis ⬤

Magnitude of 21 Virginis 5.48

Class Hypergiant

VISIBILITY RIGHT NOW

21 Virginis is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 24.3°
Azimuth: 148.9°
Direction: South-South-East

Celestial coordinates and finder chart of 21 Virginis

21 Virginis is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 21 Virginis are provided in the following table:

Right Ascension J2000 12h 33m 46s

Declination J2000 -09° 27’ 06”

Galactic Longitude 295.66°

Galactic Latitude 53.17°

Constellation Virgo

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

Simplified finder chart for 21 Virginis.

Visibility of 21 Virginis 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 Virginis 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: 99.5° RISE 15:27

Max altitude: 29.1° TRANSIT 20:37

Azimuth: 260.5° SET 1:51

RIGHT NOW 21 Virginis is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 21 Virginis

The image below is a photograph of 21 Virginis 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 Virginis is -0.08 arcsec per year in Right Ascension and 0.007 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of 21 Virginis. The red arrow shows the motion of 21 Virginis during the next 10000 years (-13.33 arcmin in Right Ascension and 1.17 arcmin in declination);

Distance of 21 Virginis from the Sun and relative movement

21 Virginis is distant 261.43 light years from the Sun and it is moving towards the Sun at the speed of 11 kilometers per second.

Distance (parsec) 80.19 pc

Distance (light year) 261.43 ly

Heliocentric radial velocity -11 km/s

Proper Motion RA -0.08 arcsec/year

Proper Motion Dec 0.007 arcsec/year

Spectral properties of 21 Virginis

21 Virginis belongs to spectral class A0 and has a luminosity class of V corresponding to a hypergiant star.

Absolute magnitude 0.96

Spectral Type A0V

Color Index (B-V) -0.03

Temperature of 21 Virginis 10516K

The red dot in the diagram below shows where 21 Virginis is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 21 Virginis. Attribution: Richard Powell / CC BY-SA

Alternative designations of 21 Virginis

Flamsteed designation 21 Virginis

Henry Draper Catalogue HD109309

SAO Catalogue SAO138845

Hipparcos Catalogue HIP61318

Durchmusterung Catalogue BD-08 3372

In Evidence

Other stars in Virgo