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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: 7:41  
clear_day Transit: 11:47  
SunsetSet: 15:53 south
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All Constellations » Sagittarius » 

51 Sagittarii

Altitude: -20.0°   Azimuth: 255.0°   Direction: West-South-West

51 Sagittarii is a variable and double star in the constellation of Sagittarius.

51 Sagittarii visual magnitude is 5.65. Because of its reltive faintness, 51 Sagittarii 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 51 Sagittarii:


51 Sagittarii is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -20.0°
Azimuth: 255.0°
Direction: West-South-West

Celestial coordinates and finder chart of 51 Sagittarii

51 Sagittarii 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 51 Sagittarii are provided in the following table:

19h 36m 01s
-24° 43’ 09”

The simplified sky map below shows the position of 51 Sagittarii in the sky:

Finder chart 51 Sagittarii star
Simplified finder chart for 51 Sagittarii.

Visibility of 51 Sagittarii 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 51 Sagittarii 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: 114.7°
Max altitude: 13.8°
Azimuth: 245.3°

Digitized Sky Survey image of 51 Sagittarii

The image below is a photograph of 51 Sagittarii 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 51 Sagittarii is 0.012 arcsec per year in Right Ascension and -0.023 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 51 Sagittarii star
DSS2 image of 51 Sagittarii. The red arrow shows the motion of 51 Sagittarii during the next 10000 years (2.00 arcmin in Right Ascension and -3.83 arcmin in declination);

Distance of 51 Sagittarii from the Sun and relative movement

51 Sagittarii is distant 290.29 light years from the Sun and it is moving towards the Sun at the speed of 31 kilometers per second.

89.05 pc
290.29 ly
-31 km/s
0.012 arcsec/year
-0.023 arcsec/year

Spectral properties of 51 Sagittarii

51 Sagittarii belongs to spectral class A7


The red dot in the diagram below shows where 51 Sagittarii is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 51 Sagittarii. Attribution: Richard Powell / CC BY-SA

51 Sagittarii star system properties

51 Sagittarii is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the 51 Sagittarii double sysyem:

0 arcsec

Alternative designations of 51 Sagittarii

51 Sagittarii