μ Draconis (mu Draconis)

μ Draconis is a multiple main-sequence star in the constellation of Draco.

μ Draconis visual magnitude is 5.83. Because of its reltive faintness, μ Draconis 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 μ Draconis:

Color of μ Draconis ⬤

Magnitude of μ Draconis 5.83

Class Main-sequence

VISIBILITY RIGHT NOW μ Draconis (mu Draconis) is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 16°.

Celestial coordinates and finder chart of μ Draconis

μ Draconis is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of μ Draconis are provided in the following table:

Right Ascension J2000 17h 05m 19s

Declination J2000 +54° 28’ 13”

Galactic Longitude 82.3°

Galactic Latitude 37.02°

Constellation Draco

The simplified sky map below shows the position of μ Draconis in the sky:

Finder chart μ Draconis (mu Draconis) star

Simplified finder chart for μ Draconis (mu Draconis).

Visibility of μ Draconis from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

μ Draconis (mu Draconis) is circumpolar and transits at 00:40 UTC (altitude: 87.0°)

Digitized Sky Survey image of μ Draconis

The image below is a photograph of μ Draconis 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 μ Draconis is -0.073 arcsec per year in Right Ascension and 0.085 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of μ Draconis. The red arrow shows the motion of μ Draconis during the next 10000 years (-12.17 arcmin in Right Ascension and 14.17 arcmin in declination);

Distance of μ Draconis from the Sun and relative movement

μ Draconis is distant 87.92 light years from the Sun and it is moving towards the Sun at the speed of 18 kilometers per second.

Distance (parsec) 26.97 pc

Distance (light year) 87.92 ly

Heliocentric radial velocity -18 km/s

Proper Motion RA -0.073 arcsec/year

Proper Motion Dec 0.085 arcsec/year

Spectral properties of μ Draconis

μ Draconis belongs to spectral class F7 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude 3.68

Spectral Type F7V

Color Index (B-V)

Temperature of μ Draconis 10125K

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

H-R diagram showing the position of μ Draconis. Attribution: Richard Powell / CC BY-SA

μ Draconis star system properties

μ Draconis is a visual double star which can be observed with the help of medium or large telescopes. The table below shows key information about the μ Draconis double sysyem:

Main star magnitude 5.83

Secondary star magnitude 5.93

Magnitude difference 0.1

Separation 2 arcsec

Alternative designations of μ Draconis

Bayer designation μ Draconis
(mu Draconis)

Flamsteed designation 21 Draconis

Henry Draper Catalogue HD154905

SAO Catalogue SAO30239

Hipparcos Catalogue HIP83608

Durchmusterung Catalogue BD+54 1857

Gliese Catalogue Wo 9584 B

Aitken Double Star Catalogue ADS10345

In Evidence

Other stars in Draco