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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:50  
clear_day Transit: 11:50  
SunsetSet: 15:49 south
sunny DaytimeWhat's Visible Now?
All Constellations » Sagittarius » 


Altitude: -25.4°   Azimuth: 119.2°   Direction: East-South-East

HR7491 is a star in the constellation of Sagittarius.

HR7491 visual magnitude is 6.16. Because of its reltive faintness, HR7491 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 HR7491:


HR7491 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -25.4°
Azimuth: 119.2°
Direction: East-South-East

Celestial coordinates and finder chart of HR7491

HR7491 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 HR7491 are provided in the following table:

19h 43m 37s
-37° 32’ 20”

The simplified sky map below shows the position of HR7491 in the sky:

Finder chart HR7491 star
Simplified finder chart for HR7491.

Visibility of HR7491 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 HR7491 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: 127.5°
Max altitude: 1.0°
Azimuth: 232.5°

Digitized Sky Survey image of HR7491

The image below is a photograph of HR7491 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 HR7491 is 0.006 arcsec per year in Right Ascension and -0.019 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR7491 star
DSS2 image of HR7491. The red arrow shows the motion of HR7491 during the next 10000 years (1.00 arcmin in Right Ascension and -3.17 arcmin in declination);

Distance of HR7491 from the Sun and relative movement

HR7491 is distant 853.40 light years from the Sun and it is moving towards the Sun at the speed of 29 kilometers per second.

261.78 pc
853.40 ly
-29 km/s
0.006 arcsec/year
-0.019 arcsec/year

Spectral properties of HR7491

HR7491 belongs to spectral class B8


The red dot in the diagram below shows where HR7491 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7491. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR7491