Your guide to the Solar System and the night sky
Latest Perseverance Images received 4 hours 36 mins ago for Sol121, Sol120, Sol119, Sol117
🌎  Greenwich, United Kingdom [change]


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:

HR7155 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 8°.

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:

18h 58m 20s
-24° 52’ 36”

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

Finder chart HR7155 star
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°
Max altitude: 13.6°
Azimuth: 245.1°
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.

Image of HR7155 star
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.

403.23 pc
1,314.52 ly
-17 km/s
0.007 arcsec/year
0.003 arcsec/year

Spectral properties of HR7155

HR7155 belongs to spectral class A0


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

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

Alternative designations of HR7155