π2 Cygni (pi2 Cygni)

Altitude: 54.1° Azimuth: 70.1° Direction: East-North-East

π2 Cygni is a giant star in the constellation of Cygnus.

π2 Cygni visual magnitude is 4.23. Because of its moderate brightness, π2 Cygni should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about π2 Cygni:

Color of π2 Cygni ⬤

Magnitude of π2 Cygni 4.23

Class Giant

VISIBILITY RIGHT NOW

π2 Cygni (pi2 Cygni) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 54.1°
Azimuth: 70.1°
Direction: East-North-East

Celestial coordinates and finder chart of π2 Cygni

π2 Cygni is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of π2 Cygni are provided in the following table:

Right Ascension J2000 21h 46m 47s

Declination J2000 +49° 18’ 33”

Galactic Longitude 94.83°

Galactic Latitude -3.22°

Constellation Cygnus

The simplified sky map below shows the position of π2 Cygni in the sky:

Simplified finder chart for π2 Cygni (pi2 Cygni).

Visibility of π2 Cygni from your location

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

π2 Cygni (pi2 Cygni) is circumpolar and transits at 04:33 UTC (altitude: 87.8°)

Digitized Sky Survey image of π2 Cygni

The image below is a photograph of π2 Cygni 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 π2 Cygni is 0.004 arcsec per year in Right Ascension and -0.002 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

DSS2 image of π2 Cygni. The red arrow shows the motion of π2 Cygni during the next 100000 years (6.67 arcmin in Right Ascension and -3.33 arcmin in declination);

Distance of π2 Cygni from the Sun and relative movement

π2 Cygni is distant 1,156.03 light years from the Sun and it is moving towards the Sun at the speed of 12 kilometers per second.

Distance (parsec) 354.61 pc

Distance (light year) 1,156.03 ly

Heliocentric radial velocity -12 km/s

Proper Motion RA 0.004 arcsec/year

Proper Motion Dec -0.002 arcsec/year

Spectral properties of π2 Cygni

π2 Cygni belongs to spectral class B3 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -3.52

Spectral Type B3III

Color Index (B-V) -0.12

Temperature of π2 Cygni 11920K

The red dot in the diagram below shows where π2 Cygni is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of π2 Cygni. Attribution: Richard Powell / CC BY-SA

Alternative designations of π2 Cygni

Bayer designation π2 Cygni
(pi2 Cygni)

Flamsteed designation 81 Cygni

Henry Draper Catalogue HD207330

SAO Catalogue SAO51293

Hipparcos Catalogue HIP107533

Durchmusterung Catalogue BD+48 3504

FK5 Catalogue 821

In Evidence

Other stars in Cygnus