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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
north SunriseRise: 7:45  
clear_day Transit: 11:48  
SunsetSet: 15:51 south
wb_twilight Nautical TwilightWhat's Visible Now?
All Constellations » Serpens » 


Altitude: 28.0°   Azimuth: 239.5°   Direction: West-South-West

HR6900 is a main-sequence star in the constellation of Serpens.

HR6900 visual magnitude is 6.74. Because of its reltive faintness, HR6900 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 HR6900:


HR6900 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 28.0°
Azimuth: 239.5°
Direction: West-South-West

Celestial coordinates and finder chart of HR6900

HR6900 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 HR6900 are provided in the following table:

18h 25m 08s
+05° 05’ 04”

The simplified sky map below shows the position of HR6900 in the sky:

Finder chart HR6900 star
Simplified finder chart for HR6900.

Visibility of HR6900 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 HR6900 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: 84.9°
Max altitude: 43.6°
Azimuth: 275.1°

Digitized Sky Survey image of HR6900

The image below is a photograph of HR6900 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 HR6900 is -0.003 arcsec per year in Right Ascension and 0.008 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of HR6900 star
DSS2 image of HR6900. The red arrow shows the motion of HR6900 during the next 100000 years (-5.00 arcmin in Right Ascension and 13.33 arcmin in declination);

Distance of HR6900 from the Sun and relative movement

HR6900 is distant 851.17 light years from the Sun and it is moving towards the Sun at the speed of 23 kilometers per second.

261.10 pc
851.17 ly
-23 km/s
-0.003 arcsec/year
0.008 arcsec/year

Spectral properties of HR6900

HR6900 belongs to spectral class B9 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR6900 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR6900. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR6900