Your Guide to the Solar System and the Night Sky
Donate now! You'll help cover server costs, enhance the site and keep it ad-free.
public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:44  
clear_day Transit: 12:57  
SunsetSet: 21:11 south
wb_twilight Nautical TwilightWhat's Visible Now
All Constellations » Aquila » 


Altitude: 52.4°   Azimuth: 154.7°   Direction: South-South-East

HR7664 is a star in the constellation of Aquila.

HR7664 visual magnitude is 5.67. Because of its reltive faintness, HR7664 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 HR7664:


HR7664 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 52.4°
Azimuth: 154.7°
Direction: South-South-East

Celestial coordinates and finder chart of HR7664

HR7664 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 HR7664 are provided in the following table:

20h 03m 29s
+16° 01’ 53”

The simplified sky map below shows the position of HR7664 in the sky:

Finder chart HR7664 star
Simplified finder chart for HR7664.

Visibility of HR7664 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 HR7664 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: 74.0°
Max altitude: 54.6°
Azimuth: 286.0°
HR7664 is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR7664

The image below is a photograph of HR7664 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 HR7664 is 0.003 arcsec per year in Right Ascension and -0.005 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of HR7664 star
DSS2 image of HR7664. The red arrow shows the motion of HR7664 during the next 100000 years (5.00 arcmin in Right Ascension and -8.33 arcmin in declination);

Distance of HR7664 from the Sun and relative movement

HR7664 is distant 636.72 light years from the Sun and it is moving towards the Sun at the speed of 22 kilometers per second.

195.31 pc
636.72 ly
-22 km/s
0.003 arcsec/year
-0.005 arcsec/year

Spectral properties of HR7664

HR7664 belongs to spectral class B9 HR7664 is also a HgMn chemically peculiar star.


The red dot in the diagram below shows where HR7664 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7664. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR7664