73 Draconis

73 Draconis is a variable hypergiant star in the constellation of Draco.

73 Draconis visual magnitude is 5.2. Because of its reltive faintness, 73 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 73 Draconis:

Color of 73 Draconis ⬤

Magnitude of 73 Draconis 5.2

Class Hypergiant

VISIBILITY RIGHT NOW 73 Draconis is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 37°.

Celestial coordinates and finder chart of 73 Draconis

73 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 73 Draconis are provided in the following table:

Right Ascension J2000 20h 31m 30s

Declination J2000 +74° 57’ 16”

Galactic Longitude 108.43°

Galactic Latitude 20.04°

Constellation Draco

The simplified sky map below shows the position of 73 Draconis in the sky:

Simplified finder chart for 73 Draconis.

Visibility of 73 Draconis from your location

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

73 Draconis is circumpolar and transits at 03:46 UTC (altitude: 66.5°)

Digitized Sky Survey image of 73 Draconis

The image below is a photograph of 73 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 73 Draconis is 0.005 arcsec per year in Right Ascension and -0.015 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of 73 Draconis. The red arrow shows the motion of 73 Draconis during the next 10000 years (0.83 arcmin in Right Ascension and -2.50 arcmin in declination);

Distance of 73 Draconis from the Sun and relative movement

73 Draconis is distant 416.88 light years from the Sun and it is moving far from the Sun at the speed of 9 kilometers per second.

Distance (parsec) 127.88 pc

Distance (light year) 416.88 ly

Heliocentric radial velocity 9 km/s

Proper Motion RA 0.005 arcsec/year

Proper Motion Dec -0.015 arcsec/year

Spectral properties of 73 Draconis

73 Draconis belongs to spectral class A0 73 Draconis is also a SrCrEu chemically peculiar star.

Absolute magnitude -0.33

Spectral Type A0

Color Index (B-V) 0.07

Temperature of 73 Draconis 9328K

The red dot in the diagram below shows where 73 Draconis is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 73 Draconis. Attribution: Richard Powell / CC BY-SA

Alternative designations of 73 Draconis

Flamsteed designation 73 Draconis

Henry Draper Catalogue HD196502

SAO Catalogue SAO9802

Hipparcos Catalogue HIP101260

Durchmusterung Catalogue BD+74 872

FK5 Catalogue 770

General Catalogue of Variable Stars AF Dra

In Evidence

Other stars in Draco