Your guide to the Solar System and the night sky
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🌎  Greenwich, United Kingdom [change]

HR7803

HR7803 is a variable and multiple main-sequence star in the constellation of Aquila.

HR7803 visual magnitude is 6.15. Because of its reltive faintness, HR7803 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 HR7803:

6.15
Main-sequence
HR7803 is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of HR7803

HR7803 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 HR7803 are provided in the following table:

20h 24m 37s
+01° 04’ 06”
45.03°
-20.09°
Aquila

The simplified sky map below shows the position of HR7803 in the sky:

Finder chart HR7803 star
Simplified finder chart for HR7803.

Visibility of HR7803 from your location

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's HR7803 rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 88.9°
Max altitude: 39.6°
Azimuth: 271.1°
HR7803 is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR7803

The image below is a photograph of HR7803 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 HR7803 is 0.003 arcsec per year in Right Ascension and 0.007 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of HR7803 star
DSS2 image of HR7803. The red arrow shows the motion of HR7803 during the next 100000 years (5.00 arcmin in Right Ascension and 11.67 arcmin in declination);

Distance of HR7803 from the Sun and relative movement

HR7803 is distant 840.21 light years from the Sun and it is moving towards the Sun at the speed of 9 kilometers per second.

257.73 pc
840.21 ly
-9 km/s
0.003 arcsec/year
0.007 arcsec/year

Spectral properties of HR7803

HR7803 belongs to spectral class B9 and has a luminosity class of V corresponding to a main-sequence star.

-0.91
B9V
10653K

The red dot in the diagram below shows where HR7803 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7803. Attribution: Richard Powell / CC BY-SA

HR7803 star system properties

HR7803 is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the HR7803 double sysyem:

6.15
10.85
4.7
31.3 arcsec

Alternative designations of HR7803

SAO125769
SAO125769