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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
SunriseRise: 7:03  
clear_day Transit: 12:12  
SunsetSet: 17:22
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All Constellations » Boötes » 

Muphrid - η Boötis (eta Boötis)

Altitude: 17.7°   Azimuth: 82.4°   Direction: East

Muphrid, also designated as η Boötis (eta Boötis), is a double hypergiant star in the constellation of Boötes.

Muphrid visual magnitude is 2.68. Thanks to its high brightness, Muphrid is clearly visible when observed from locations with dark skyes, and should be also quite easily visible from light polluted areas.

The proper motion of Muphrid is -0.063 arcsec per year in Right Ascension and -0.358 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of Muphrid - η Boötis (eta Boötis) star
DSS2 image of Muphrid. The red arrow shows the motion of Muphrid during the next 1000 years (-1.05 arcmin in Right Ascension and -5.97 arcmin in declination);

Key facts about Muphrid


Muphrid - η Boötis (eta Boötis) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 17.7°
Azimuth: 82.4°
Direction: East

Celestial coordinates and finder chart of Muphrid

Muphrid 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 Muphrid are provided in the following table:

13h 54m 41s
+18° 23’ 52”

The simplified sky map below shows the position of Muphrid in the sky:

Finder chart Muphrid - η Boötis (eta Boötis) star
Simplified finder chart for Muphrid - η Boötis (eta Boötis).

Visibility of Muphrid 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 Muphrid - η Boötis (eta Boötis) 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: 71.6°
Max altitude: 56.9°
Azimuth: 288.4°

Distance of Muphrid from the Sun and relative movement

Muphrid is distant 36.97 light years from the Sun

11.34 pc
36.97 ly
-0.063 arcsec/year
-0.358 arcsec/year

Spectral properties of Muphrid

Muphrid belongs to spectral class G0 and has a luminosity class of IV corresponding to a hypergiant star.


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

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

Muphrid star system properties

Muphrid 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 Muphrid double sysyem:

112.6 arcsec

Alternative designations of Muphrid

η Boötis
(eta Boötis)