Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:45  
clear_day Transit: 12:57  
SunsetSet: 21:10 south
sunny DaytimeWhat's Visible Now
All Constellations » Serpens » 

45 Serpentis

Altitude: -1.5°   Azimuth: 288.0°   Direction: West-North-West

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

45 Serpentis visual magnitude is 5.63. Because of its reltive faintness, 45 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 45 Serpentis:


45 Serpentis is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -1.5°
Azimuth: 288.0°
Direction: West-North-West

Celestial coordinates and finder chart of 45 Serpentis

45 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 45 Serpentis are provided in the following table:

16h 07m 37s
+09° 53’ 30”

The simplified sky map below shows the position of 45 Serpentis in the sky:

Finder chart 45 Serpentis star
Simplified finder chart for 45 Serpentis.

Visibility of 45 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 45 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: 80.1°
Max altitude: 48.4°
Azimuth: 279.9°
45 Serpentis is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 45 Serpentis

The image below is a photograph of 45 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 45 Serpentis is -0.021 arcsec per year in Right Ascension and -0.004 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 45 Serpentis star
DSS2 image of 45 Serpentis. The red arrow shows the motion of 45 Serpentis during the next 10000 years (-3.50 arcmin in Right Ascension and -0.67 arcmin in declination);

Distance of 45 Serpentis from the Sun and relative movement

45 Serpentis is distant 268.98 light years from the Sun and it is moving towards the Sun at the speed of 28 kilometers per second.

82.51 pc
268.98 ly
-28 km/s
-0.021 arcsec/year
-0.004 arcsec/year

Spectral properties of 45 Serpentis

45 Serpentis belongs to spectral class A7 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where 45 Serpentis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 45 Serpentis. Attribution: Richard Powell / CC BY-SA

Alternative designations of 45 Serpentis

45 Serpentis