HR7764

Altitude: 9.0° Azimuth: 173.0° Direction: South

HR7764 is a multiple main-sequence star in the constellation of Sagittarius.

HR7764 visual magnitude is 6.3. Because of its reltive faintness, HR7764 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 HR7764:

Color of HR7764 ⬤

Magnitude of HR7764 6.3

Class Main-sequence

VISIBILITY RIGHT NOW

HR7764 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 9.0°
Azimuth: 173.0°
Direction: South

Celestial coordinates and finder chart of HR7764

HR7764 is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR7764 are provided in the following table:

Right Ascension J2000 20h 20m 28s

Declination J2000 -29° 11’ 49”

Galactic Longitude 13.6°

Galactic Latitude -31.11°

Constellation Sagittarius

The simplified sky map below shows the position of HR7764 in the sky:

Simplified finder chart for HR7764.

Visibility of HR7764 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 HR7764 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: 119.2° RISE 18:06

Max altitude: 9.3° TRANSIT 21:06

Azimuth: 240.8° SET 0:07

Digitized Sky Survey image of HR7764

The image below is a photograph of HR7764 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 HR7764 is 0.028 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 HR7764. The red arrow shows the motion of HR7764 during the next 10000 years (4.67 arcmin in Right Ascension and 0.67 arcmin in declination);

Distance of HR7764 from the Sun and relative movement

HR7764 is distant 711.79 light years from the Sun and it is moving far from the Sun at the speed of 4 kilometers per second.

Distance (parsec) 218.34 pc

Distance (light year) 711.79 ly

Heliocentric radial velocity 4 km/s

Proper Motion RA 0.028 arcsec/year

Proper Motion Dec 0.004 arcsec/year

Spectral properties of HR7764

HR7764 belongs to spectral class A4 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude -0.40

Spectral Type A4V

Color Index (B-V) 0.17

Temperature of HR7764 8403K

The red dot in the diagram below shows where HR7764 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7764. Attribution: Richard Powell / CC BY-SA

HR7764 star system properties

HR7764 is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the HR7764 double sysyem:

Main star magnitude 6.3

Secondary star magnitude 7.4

Magnitude difference 1.1

Separation 27.2 arcsec

Alternative designations of HR7764

Henry Draper Catalogue HD193281

SAO Catalogue SAO189164

Hipparcos Catalogue HIP100288

Durchmusterung Catalogue CD-2916981

Aitken Double Star Catalogue ADS13702

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