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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: 7:44  
clear_day Transit: 11:48  
SunsetSet: 15:51 south
sunny DaytimeWhat's Visible Now?
All Constellations » Serpens » 

43 Serpentis

Altitude: 23.9°   Azimuth: 246.1°   Direction: West-South-West

43 Serpentis is a double giant star in the constellation of Serpens.

43 Serpentis visual magnitude is 6.08. Because of its reltive faintness, 43 Serpentis 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 43 Serpentis:


43 Serpentis is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 23.9°
Azimuth: 246.1°
Direction: West-South-West

Celestial coordinates and finder chart of 43 Serpentis

43 Serpentis 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 43 Serpentis are provided in the following table:

16h 03m 45s
+04° 59’ 12”

The simplified sky map below shows the position of 43 Serpentis in the sky:

Finder chart 43 Serpentis star
Simplified finder chart for 43 Serpentis.

Visibility of 43 Serpentis 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 43 Serpentis 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: 85.0°
Max altitude: 43.5°
Azimuth: 275.0°

Digitized Sky Survey image of 43 Serpentis

The image below is a photograph of 43 Serpentis 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 43 Serpentis is -0.041 arcsec per year in Right Ascension and 0.012 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 43 Serpentis star
DSS2 image of 43 Serpentis. The red arrow shows the motion of 43 Serpentis during the next 10000 years (-6.83 arcmin in Right Ascension and 2.00 arcmin in declination);

Distance of 43 Serpentis from the Sun and relative movement

43 Serpentis is distant 389.49 light years from the Sun and it is moving towards the Sun at the speed of 44 kilometers per second.

119.47 pc
389.49 ly
-44 km/s
-0.041 arcsec/year
0.012 arcsec/year

Spectral properties of 43 Serpentis

43 Serpentis belongs to spectral class G9 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where 43 Serpentis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 43 Serpentis. Attribution: Richard Powell / CC BY-SA

43 Serpentis star system properties

43 Serpentis 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 43 Serpentis double sysyem:

30.8 arcsec

Alternative designations of 43 Serpentis

43 Serpentis