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

HR7817

HR7817 is a bright giant star in the constellation of Microscopium.

HR7817 visual magnitude is 6.1. Because of its reltive faintness, HR7817 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 HR7817:

6.1
Bright giant
HR7817 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 2°.

Celestial coordinates and finder chart of HR7817

HR7817 is situated south of the celestial equator, as such, it is more easily visible from the southern emisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR7817 are provided in the following table:

20h 28m 46s
-35° 35’ 44”
6.69°
-34.31°
Microscopium

The simplified sky map below shows the position of HR7817 in the sky:

Finder chart HR7817 star
Simplified finder chart for HR7817.

Visibility of HR7817 from your location

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

Today's HR7817 rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 125.6°
Max altitude: 2.9°
Azimuth: 234.4°
HR7817 is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR7817

The image below is a photograph of HR7817 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 HR7817 is 0.008 arcsec per year in Right Ascension and -0.021 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR7817 star
DSS2 image of HR7817. The red arrow shows the motion of HR7817 during the next 10000 years (1.33 arcmin in Right Ascension and -3.50 arcmin in declination);

Distance of HR7817 from the Sun and relative movement

HR7817 is distant 626.92 light years from the Sun and it is moving towards the Sun at the speed of 9 kilometers per second.

192.31 pc
626.92 ly
-9 km/s
0.008 arcsec/year
-0.021 arcsec/year

Spectral properties of HR7817

HR7817 belongs to spectral class B8 and has a luminosity class of II corresponding to a bright giant star.

-0.32
B8II
11744K

The red dot in the diagram below shows where HR7817 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR7817. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR7817

SAO212160
SAO212160