HR7220

HR7220 is a variable bright giant star in the constellation of Aquila.

HR7220 visual magnitude is 6.9. Because of its reltive faintness, HR7220 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 HR7220:

Color of HR7220 ⬤

Magnitude of HR7220 6.9

Class Bright giant

VISIBILITY RIGHT NOW HR7220 is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 15°.

Celestial coordinates and finder chart of HR7220

HR7220 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 HR7220 are provided in the following table:

Right Ascension J2000 19h 04m 24s

Declination J2000 -05° 41’ 05”

Galactic Longitude 29.33°

Galactic Latitude -5.47°

Constellation Aquila

The simplified sky map below shows the position of HR7220 in the sky:

Simplified finder chart for HR7220.

Visibility of HR7220 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 HR7220 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: 95.7° RISE 21:53

Max altitude: 32.8° TRANSIT 3:27

Azimuth: 264.3° SET 8:56

RIGHT NOW HR7220 is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR7220

The image below is a photograph of HR7220 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 HR7220 is 0.02 arcsec per year in Right Ascension and -0.005 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR7220. The red arrow shows the motion of HR7220 during the next 10000 years (3.33 arcmin in Right Ascension and -0.83 arcmin in declination);

Distance of HR7220 from the Sun and relative movement

HR7220 is distant 1,207.41 light years from the Sun and it is moving far from the Sun at the speed of 37 kilometers per second.

Distance (parsec) 370.37 pc

Distance (light year) 1,207.41 ly

Heliocentric radial velocity 37 km/s

Proper Motion RA 0.02 arcsec/year

Proper Motion Dec -0.005 arcsec/year

Spectral properties of HR7220

HR7220 belongs to spectral class C5 and has a luminosity class of II corresponding to a bright giant star.

Absolute magnitude -0.94

Spectral Type C5II

Color Index (B-V) 4.19

Temperature of HR7220 1856K

The red dot in the diagram below shows where HR7220 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7220. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR7220

Henry Draper Catalogue HD177336

SAO Catalogue SAO142985

Hipparcos Catalogue HIP93666

Durchmusterung Catalogue BD-05 4858

General Catalogue of Variable Stars V Aql

In Evidence

Other stars in Aquila