HR7155

HR7155 is a hypergiant star in the constellation of Sagittarius.

HR7155 visual magnitude is 6.62. Because of its reltive faintness, HR7155 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 HR7155:

Color of HR7155 ⬤

Magnitude of HR7155 6.62

Class Hypergiant

VISIBILITY RIGHT NOW HR7155 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 7°.

Celestial coordinates and finder chart of HR7155

HR7155 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 HR7155 are provided in the following table:

Right Ascension J2000 18h 58m 20s

Declination J2000 -24° 52’ 36”

Galactic Longitude 11.17°

Galactic Latitude -12.48°

Constellation Sagittarius

The simplified sky map below shows the position of HR7155 in the sky:

Simplified finder chart for HR7155.

Visibility of HR7155 from your location

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

Today's HR7155 rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 114.9° RISE 3:19

Max altitude: 13.6° TRANSIT 6:56

Azimuth: 245.1° SET 10:32

RIGHT NOW HR7155 is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR7155

The image below is a photograph of HR7155 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 HR7155 is 0.007 arcsec per year in Right Ascension and 0.003 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

DSS2 image of HR7155. The red arrow shows the motion of HR7155 during the next 100000 years (11.67 arcmin in Right Ascension and 5.00 arcmin in declination);

Distance of HR7155 from the Sun and relative movement

HR7155 is distant 1,314.52 light years from the Sun and it is moving towards the Sun at the speed of 17 kilometers per second.

Distance (parsec) 403.23 pc

Distance (light year) 1,314.52 ly

Heliocentric radial velocity -17 km/s

Proper Motion RA 0.007 arcsec/year

Proper Motion Dec 0.003 arcsec/year

Spectral properties of HR7155

HR7155 belongs to spectral class A0

Absolute magnitude -1.41

Spectral Type A0

Color Index (B-V) 0.08

Temperature of HR7155 9226K

The red dot in the diagram below shows where HR7155 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7155. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR7155

Henry Draper Catalogue HD175852

SAO Catalogue SAO187517

Hipparcos Catalogue HIP93132

Durchmusterung Catalogue CD-2513574

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Other stars in Sagittarius