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: 6:52  
clear_day Transit: 12:49  
SunsetSet: 18:46 south
sunny DaytimeWhat's Visible Now
All Constellations » Serpens » 

θ2 Serpentis (theta2 Serpentis)

Altitude: 34.8°   Azimuth: 136.8°   Direction: South-East

θ2 Serpentis is a multiple main-sequence star in the constellation of Serpens.

θ2 Serpentis visual magnitude is 4.98. Because of its moderate brightness, θ2 Serpentis should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about θ2 Serpentis:


θ2 Serpentis (theta2 Serpentis) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 34.8°
Azimuth: 136.8°
Direction: South-East

Celestial coordinates and finder chart of θ2 Serpentis

θ2 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 θ2 Serpentis are provided in the following table:

18h 56m 14s
+04° 12’ 06”

The simplified sky map below shows the position of θ2 Serpentis in the sky:

Finder chart θ2 Serpentis (theta2 Serpentis) star
Simplified finder chart for θ2 Serpentis (theta2 Serpentis).

Visibility of θ2 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 θ2 Serpentis (theta2 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: 85.8°
Max altitude: 42.7°
Azimuth: 274.2°

Digitized Sky Survey image of θ2 Serpentis

The image below is a photograph of θ2 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 θ2 Serpentis is 0.049 arcsec per year in Right Ascension and 0.026 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of θ2 Serpentis (theta2 Serpentis) star
DSS2 image of θ2 Serpentis. The red arrow shows the motion of θ2 Serpentis during the next 10000 years (8.17 arcmin in Right Ascension and 4.33 arcmin in declination);

Distance of θ2 Serpentis from the Sun and relative movement

θ2 Serpentis is distant 142.73 light years from the Sun and it is moving towards the Sun at the speed of 53 kilometers per second.

43.78 pc
142.73 ly
-53 km/s
0.049 arcsec/year
0.026 arcsec/year

Spectral properties of θ2 Serpentis

θ2 Serpentis belongs to spectral class A5 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where θ2 Serpentis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of θ2 Serpentis. Attribution: Richard Powell / CC BY-SA

θ2 Serpentis star system properties

θ2 Serpentis is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the θ2 Serpentis double sysyem:

22.2 arcsec

Alternative designations of θ2 Serpentis

θ2 Serpentis
(theta2 Serpentis)
63 Serpentis