40 Draconis

Altitude: 53.0° Azimuth: 16.2° Direction: North-North-East

40 Draconis is a variable and multiple star in the constellation of Draco.

40 Draconis visual magnitude is 6.04. Because of its reltive faintness, 40 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 40 Draconis:

Color of 40 Draconis ⬤

Magnitude of 40 Draconis 6.04

Class

VISIBILITY RIGHT NOW

40 Draconis is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 53.0°
Azimuth: 16.2°
Direction: North-North-East

Celestial coordinates and finder chart of 40 Draconis

40 Draconis is situated close to the northern celestial pole and, as such, it is visible for most part of the year from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 40 Draconis are provided in the following table:

Right Ascension J2000 18h 00m 03s

Declination J2000 +80° 00’ 02”

Galactic Longitude 111.78°

Galactic Latitude 28.91°

Constellation Draco

The simplified sky map below shows the position of 40 Draconis in the sky:

Simplified finder chart for 40 Draconis.

Visibility of 40 Draconis from your location

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

40 Draconis is circumpolar and transits at 17:19 UTC (altitude: 61.5°)

Digitized Sky Survey image of 40 Draconis

The image below is a photograph of 40 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 40 Draconis is 0.045 arcsec per year in Right Ascension and 0.129 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

DSS2 image of 40 Draconis. The red arrow shows the motion of 40 Draconis during the next 1000 years (0.75 arcmin in Right Ascension and 2.15 arcmin in declination);

Distance of 40 Draconis from the Sun and relative movement

40 Draconis is distant 165.99 light years from the Sun and it is moving far from the Sun at the speed of 4 kilometers per second.

Distance (parsec) 50.92 pc

Distance (light year) 165.99 ly

Heliocentric radial velocity 4 km/s

Proper Motion RA 0.045 arcsec/year

Proper Motion Dec 0.129 arcsec/year

Spectral properties of 40 Draconis

40 Draconis belongs to spectral class F7

Absolute magnitude 2.51

Spectral Type F7

Color Index (B-V) 0.51

Temperature of 40 Draconis 6344K

The red dot in the diagram below shows where 40 Draconis is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 40 Draconis. Attribution: Richard Powell / CC BY-SA

40 Draconis star system properties

40 Draconis is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the 40 Draconis double sysyem:

Main star magnitude 6.04

Secondary star magnitude 6.44

Magnitude difference 0.4

Separation 19.3 arcsec

Alternative designations of 40 Draconis

Flamsteed designation 40 Draconis

Henry Draper Catalogue HD166865

SAO Catalogue SAO8994

Hipparcos Catalogue HIP88127

Durchmusterung Catalogue BD+79 570

General Catalogue of Variable Stars 10205

Aitken Double Star Catalogue ADS11061

Support us

In Evidence

Other stars in Draco