HR7398

HR7398 is a double giant star in the constellation of Sagittarius.

HR7398 visual magnitude is 5.52. Because of its reltive faintness, HR7398 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 HR7398:

Color of HR7398 ⬤

Magnitude of HR7398 5.52

Class Giant

VISIBILITY RIGHT NOW HR7398 is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of HR7398

HR7398 is situated south of the celestial equator, as such, it is more easily visible from the southern emisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR7398 are provided in the following table:

Right Ascension J2000 19h 29m 52s

Declination J2000 -26° 59’ 08”

Galactic Longitude 12°

Galactic Latitude -19.83°

Constellation Sagittarius

The simplified sky map below shows the position of HR7398 in the sky:

Simplified finder chart for HR7398.

Visibility of HR7398 from your location

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's HR7398 rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 117.0° RISE 4:48

Max altitude: 11.5° TRANSIT 8:08

Azimuth: 243.0° SET 11:27

RIGHT NOW HR7398 is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR7398

The image below is a photograph of HR7398 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 HR7398 is 0.034 arcsec per year in Right Ascension and -0.041 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR7398. The red arrow shows the motion of HR7398 during the next 10000 years (5.67 arcmin in Right Ascension and -6.83 arcmin in declination);

Distance of HR7398 from the Sun and relative movement

HR7398 is distant 253.70 light years from the Sun and it is moving towards the Sun at the speed of 31 kilometers per second.

Distance (parsec) 77.82 pc

Distance (light year) 253.70 ly

Heliocentric radial velocity -31 km/s

Proper Motion RA 0.034 arcsec/year

Proper Motion Dec -0.041 arcsec/year

Spectral properties of HR7398

HR7398 belongs to spectral class K3 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude 1.06

Spectral Type K3III

Color Index (B-V) 1.12

Temperature of HR7398 4472K

The red dot in the diagram below shows where HR7398 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7398. Attribution: Richard Powell / CC BY-SA

HR7398 star system properties

HR7398 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 HR7398 double sysyem:

Main star magnitude 5.52

Secondary star magnitude 9.02

Magnitude difference 3.5

Separation 7.6 arcsec

Alternative designations of HR7398

Henry Draper Catalogue HD183275

SAO Catalogue SAO188192

Hipparcos Catalogue HIP95865

Durchmusterung Catalogue CD-2714004

Gliese Catalogue Wo 9657 A

Aitken Double Star Catalogue ADS12506

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