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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
SunriseRise: 6:48  
clear_day Transit: 12:11  
SunsetSet: 17:34
wb_twilight Astronomical TwilightWhat's Visible Now?
All Constellations » Ophiuchus » 


Altitude: 44.7°   Azimuth: 140.9°   Direction: South-East

HR6521 is a main-sequence star in the constellation of Ophiuchus.

HR6521 visual magnitude is 6.39. Because of its reltive faintness, HR6521 should be visible only from locations with dark skies, while it is not visible at all from skies affected by light pollution.

The proper motion of HR6521 is -0.026 arcsec per year in Right Ascension and 0.053 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR6521 star
DSS2 image of HR6521. The red arrow shows the motion of HR6521 during the next 10000 years (-4.33 arcmin in Right Ascension and 8.83 arcmin in declination);

Key facts about HR6521


HR6521 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 44.7°
Azimuth: 140.9°
Direction: South-East

Celestial coordinates and finder chart of HR6521

HR6521 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 HR6521 are provided in the following table:

17h 30m 22s
+11° 55’ 30”

The simplified sky map below shows the position of HR6521 in the sky:

Finder chart HR6521 star
Simplified finder chart for HR6521.

Visibility of HR6521 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 HR6521 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: 78.1°
Max altitude: 50.4°
Azimuth: 281.9°

Distance of HR6521 from the Sun and relative movement

HR6521 is distant 309.00 light years from the Sun and it is moving towards the Sun at the speed of 25 kilometers per second.

94.79 pc
309.00 ly
-25 km/s
-0.026 arcsec/year
0.053 arcsec/year

Spectral properties of HR6521

HR6521 belongs to spectral class A1 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR6521 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR6521. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR6521