π Aquilae (pi Aquilae)

π Aquilae is a variable and multiple giant star in the constellation of Aquila.

π Aquilae visual magnitude is 5.72. Because of its reltive faintness, π Aquilae 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 π Aquilae:

Color of π Aquilae ⬤

Magnitude of π Aquilae 5.72

Class Giant

VISIBILITY RIGHT NOW π Aquilae (pi Aquilae) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of π Aquilae

π Aquilae 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 π Aquilae are provided in the following table:

Right Ascension J2000 19h 48m 42s

Declination J2000 +11° 48’ 56”

Galactic Longitude 50.08°

Galactic Latitude -7.01°

Constellation Aquila

The simplified sky map below shows the position of π Aquilae in the sky:

Finder chart π Aquilae (pi Aquilae) star

Simplified finder chart for π Aquilae (pi Aquilae).

Visibility of π Aquilae 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 π Aquilae (pi Aquilae) 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: 78.2° RISE 21:16

Max altitude: 50.3° TRANSIT 4:19

Azimuth: 281.8° SET 11:17

RIGHT NOW π Aquilae (pi Aquilae) is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of π Aquilae

The image below is a photograph of π Aquilae 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 π Aquilae is 0.018 arcsec per year in Right Ascension and -0.004 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of π Aquilae. The red arrow shows the motion of π Aquilae during the next 10000 years (3.00 arcmin in Right Ascension and -0.67 arcmin in declination);

Distance of π Aquilae from the Sun and relative movement

π Aquilae is distant 569.93 light years from the Sun and it is moving far from the Sun at the speed of 13 kilometers per second.

Distance (parsec) 174.83 pc

Distance (light year) 569.93 ly

Heliocentric radial velocity 13 km/s

Proper Motion RA 0.018 arcsec/year

Proper Motion Dec -0.004 arcsec/year

Spectral properties of π Aquilae

π Aquilae belongs to spectral class G2 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -0.49

Spectral Type G2III

Color Index (B-V)

Temperature of π Aquilae 10125K

The red dot in the diagram below shows where π Aquilae is situated in the Hertzsprung–Russell diagram.

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

π Aquilae star system properties

π Aquilae is a visual double star which can be observed with the help of large telescopes. The table below shows key information about the π Aquilae double sysyem:

Main star magnitude 5.72

Secondary star magnitude 6.22

Magnitude difference 0.5

Separation 1.4 arcsec

Alternative designations of π Aquilae

Bayer designation π Aquilae
(pi Aquilae)

Flamsteed designation 52 Aquilae

Henry Draper Catalogue HD187259

SAO Catalogue SAO105282

Hipparcos Catalogue HIP97473

Durchmusterung Catalogue BD+11 3994

General Catalogue of Variable Stars 12425

Aitken Double Star Catalogue ADS12962

In Evidence

Other stars in Aquila