Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 6:49  
clear_day Transit: 12:50  
SunsetSet: 18:50 south
sleep NighttimeWhat's Visible Now
All Constellations » Sagittarius » 


Altitude: -18.6°   Azimuth: 249.8°   Direction: West-South-West

HR6621 is a variable sub-giant star in the constellation of Sagittarius.

HR6621 visual magnitude is 6.35. Because of its reltive faintness, HR6621 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 HR6621:


HR6621 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -18.6°
Azimuth: 249.8°
Direction: West-South-West

Celestial coordinates and finder chart of HR6621

HR6621 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 HR6621 are provided in the following table:

17h 48m 27s
-26° 58’ 30”

The simplified sky map below shows the position of HR6621 in the sky:

Finder chart HR6621 star
Simplified finder chart for HR6621.

Visibility of HR6621 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 HR6621 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: 117.0°
Max altitude: 11.5°
Azimuth: 243.0°

Digitized Sky Survey image of HR6621

The image below is a photograph of HR6621 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 HR6621 is 0 arcsec per year in Right Ascension and -0.012 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR6621 star
DSS2 image of HR6621. The red arrow shows the motion of HR6621 during the next 10000 years (0.00 arcmin in Right Ascension and -2.00 arcmin in declination);

Distance of HR6621 from the Sun and relative movement

HR6621 is distant 1,135.89 light years from the Sun and it is moving far from the Sun at the speed of 9 kilometers per second.

348.43 pc
1,135.89 ly
9 km/s
-0.012 arcsec/year

Spectral properties of HR6621

HR6621 belongs to spectral class B4 and has a luminosity class of IV corresponding to a sub-giant star.


The red dot in the diagram below shows where HR6621 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR6621. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR6621