HR7681

Altitude: 32.8° Azimuth: 160.9° Direction: South-South-East

HR7681 is a hypergiant star in the constellation of Aquila.

HR7681 visual magnitude is 6.47. Because of its reltive faintness, HR7681 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 HR7681:

Color of HR7681 ⬤

Magnitude of HR7681 6.47

Class Hypergiant

VISIBILITY RIGHT NOW

HR7681 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 32.8°
Azimuth: 160.9°
Direction: South-South-East

Celestial coordinates and finder chart of HR7681

HR7681 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 HR7681 are provided in the following table:

Right Ascension J2000 20h 06m 12s

Declination J2000 -04° 04’ 41”

Galactic Longitude 37.92°

Galactic Latitude -18.48°

Constellation Aquila

The simplified sky map below shows the position of HR7681 in the sky:

Simplified finder chart for HR7681.

Visibility of HR7681 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 HR7681 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: 94.1° RISE 22:23

Max altitude: 34.4° TRANSIT 4:05

Azimuth: 265.9° SET 9:42

RIGHT NOW HR7681 is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR7681

The image below is a photograph of HR7681 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 HR7681 is 0.045 arcsec per year in Right Ascension and -0.045 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR7681. The red arrow shows the motion of HR7681 during the next 10000 years (7.50 arcmin in Right Ascension and -7.50 arcmin in declination);

Distance of HR7681 from the Sun and relative movement

HR7681 is distant 340.65 light years from the Sun and it is moving towards the Sun at the speed of 2 kilometers per second.

Distance (parsec) 104.49 pc

Distance (light year) 340.65 ly

Heliocentric radial velocity -2 km/s

Proper Motion RA 0.045 arcsec/year

Proper Motion Dec -0.045 arcsec/year

Spectral properties of HR7681

HR7681 belongs to spectral class K0

Absolute magnitude 1.37

Spectral Type K0

Color Index (B-V) 1.16

Temperature of HR7681 4389K

The red dot in the diagram below shows where HR7681 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7681. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR7681

Henry Draper Catalogue HD190664

SAO Catalogue SAO144062

Hipparcos Catalogue HIP99024

Durchmusterung Catalogue BD-04 5013

In Evidence

Other stars in Aquila