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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 6:47  
clear_day Transit: 12:50  
SunsetSet: 18:52 south
sleep NighttimeWhat's Visible Now
All Constellations » Sagitta » 

η Sagittae (eta Sagittae)

Altitude: 56.3°   Azimuth: 206.3°   Direction: South-South-West

η Sagittae is a giant star in the constellation of Sagitta.

η Sagittae visual magnitude is 5.1. Because of its reltive faintness, η Sagittae 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 η Sagittae:


η Sagittae (eta Sagittae) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 56.3°
Azimuth: 206.3°
Direction: South-South-West

Celestial coordinates and finder chart of η Sagittae

η Sagittae 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 η Sagittae are provided in the following table:

20h 05m 09s
+19° 59’ 27”

The simplified sky map below shows the position of η Sagittae in the sky:

Finder chart η Sagittae (eta Sagittae) star
Simplified finder chart for η Sagittae (eta Sagittae).

Visibility of η Sagittae 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 η Sagittae (eta Sagittae) 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: 70.0°
Max altitude: 58.5°
Azimuth: 290.0°

Digitized Sky Survey image of η Sagittae

The image below is a photograph of η Sagittae 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 η Sagittae is 0.03 arcsec per year in Right Ascension and 0.078 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of η Sagittae (eta Sagittae) star
DSS2 image of η Sagittae. The red arrow shows the motion of η Sagittae during the next 10000 years (5.00 arcmin in Right Ascension and 13.00 arcmin in declination);

Distance of η Sagittae from the Sun and relative movement

η Sagittae is distant 161.63 light years from the Sun and it is moving towards the Sun at the speed of 40 kilometers per second.

49.58 pc
161.63 ly
-40 km/s
0.03 arcsec/year
0.078 arcsec/year

Spectral properties of η Sagittae

η Sagittae belongs to spectral class K2 and has a luminosity class of III corresponding to a giant star.


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

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

Alternative designations of η Sagittae

η Sagittae
(eta Sagittae)
16 Sagittae