HR7578

Altitude: 14.6° Azimuth: 181.9° Direction: South

HR7578 is a variable and double main-sequence star in the constellation of Sagittarius.

HR7578 visual magnitude is 6.18. Because of its reltive faintness, HR7578 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 HR7578:

Color of HR7578 ⬤

Magnitude of HR7578 6.18

Class Main-sequence

VISIBILITY RIGHT NOW

HR7578 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 14.6°
Azimuth: 181.9°
Direction: South

Celestial coordinates and finder chart of HR7578

HR7578 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 HR7578 are provided in the following table:

Right Ascension J2000 19h 54m 17s

Declination J2000 -23° 56’ 27”

Galactic Longitude 17.18°

Galactic Latitude -23.91°

Constellation Sagittarius

The simplified sky map below shows the position of HR7578 in the sky:

Simplified finder chart for HR7578.

Visibility of HR7578 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 HR7578 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: 113.9° RISE 11:26

Max altitude: 14.6° TRANSIT 15:09

Azimuth: 246.1° SET 18:52

Digitized Sky Survey image of HR7578

The image below is a photograph of HR7578 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 HR7578 is -0.131 arcsec per year in Right Ascension and -0.414 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

DSS2 image of HR7578. The red arrow shows the motion of HR7578 during the next 1000 years (-2.18 arcmin in Right Ascension and -6.90 arcmin in declination);

Distance of HR7578 from the Sun and relative movement

HR7578 is distant 46.35 light years from the Sun and it is moving towards the Sun at the speed of 7 kilometers per second.

Distance (parsec) 14.22 pc

Distance (light year) 46.35 ly

Heliocentric radial velocity -7 km/s

Proper Motion RA -0.131 arcsec/year

Proper Motion Dec -0.414 arcsec/year

Spectral properties of HR7578

HR7578 belongs to spectral class K2 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude 5.42

Spectral Type K2V

Color Index (B-V) 1.02

Temperature of HR7578 4695K

The red dot in the diagram below shows where HR7578 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7578. Attribution: Richard Powell / CC BY-SA

HR7578 star system properties

HR7578 is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the HR7578 double sysyem:

Main star magnitude 6.18

Secondary star magnitude 10.18

Magnitude difference 4

Separation 31.5 arcsec

Alternative designations of HR7578

Henry Draper Catalogue HD188088

SAO Catalogue SAO188692

Hipparcos Catalogue HIP97944

Durchmusterung Catalogue CD-2415668

Gliese Catalogue Gl 770

General Catalogue of Variable Stars Var?

Aitken Double Star Catalogue ADS13072

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