ψ1 Draconis (psi1 Draconis)

Altitude: 68.8° Azimuth: 9.0° Direction: North

ψ1 Draconis is a multiple hypergiant star in the constellation of Draco.

ψ1 Draconis visual magnitude is 5.79. Because of its reltive faintness, ψ1 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 ψ1 Draconis:

Color of ψ1 Draconis ⬤

Magnitude of ψ1 Draconis 5.79

Class Hypergiant

VISIBILITY RIGHT NOW

ψ1 Draconis (psi1 Draconis) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 68.8°
Azimuth: 9.0°
Direction: North

Celestial coordinates and finder chart of ψ1 Draconis

ψ1 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 ψ1 Draconis are provided in the following table:

Right Ascension J2000 17h 41m 57s

Declination J2000 +72° 09’ 24”

Galactic Longitude 102.98°

Galactic Latitude 31.03°

Constellation Draco

The simplified sky map below shows the position of ψ1 Draconis in the sky:

Finder chart ψ1 Draconis (psi1 Draconis) star

Simplified finder chart for ψ1 Draconis (psi1 Draconis).

Visibility of ψ1 Draconis from your location

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

ψ1 Draconis (psi1 Draconis) is circumpolar and transits at 12:45 UTC (altitude: 69.3°)

Digitized Sky Survey image of ψ1 Draconis

The image below is a photograph of ψ1 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 ψ1 Draconis is 0.03 arcsec per year in Right Ascension and -0.278 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of ψ1 Draconis (psi1 Draconis) star

DSS2 image of ψ1 Draconis. The red arrow shows the motion of ψ1 Draconis during the next 1000 years (0.50 arcmin in Right Ascension and -4.63 arcmin in declination);

Distance of ψ1 Draconis from the Sun and relative movement

ψ1 Draconis is distant 72.77 light years from the Sun and it is moving towards the Sun at the speed of 10 kilometers per second.

Distance (parsec) 22.32 pc

Distance (light year) 72.77 ly

Heliocentric radial velocity -10 km/s

Proper Motion RA 0.03 arcsec/year

Proper Motion Dec -0.278 arcsec/year

Spectral properties of ψ1 Draconis

ψ1 Draconis belongs to spectral class G0 and has a luminosity class of V corresponding to a hypergiant star.

Absolute magnitude 4.05

Spectral Type G0V

Color Index (B-V) 0.53

Temperature of ψ1 Draconis 6256K

The red dot in the diagram below shows where ψ1 Draconis is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of ψ1 Draconis. Attribution: Richard Powell / CC BY-SA

ψ1 Draconis star system properties

ψ1 Draconis is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the ψ1 Draconis double sysyem:

Main star magnitude 5.79

Secondary star magnitude 6.99

Magnitude difference 1.2

Separation 30.2 arcsec

Alternative designations of ψ1 Draconis

Bayer designation ψ1 Draconis
(psi1 Draconis)

Flamsteed designation 31 Draconis

Henry Draper Catalogue HD162004

SAO Catalogue SAO8891

Hipparcos Catalogue HIP86620

Durchmusterung Catalogue BD+72 805

Gliese Catalogue Gl 694.1B

Aitken Double Star Catalogue ADS10759

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In Evidence

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