Tianyi - 7 Draconis

Altitude: 45.5° Azimuth: 325.8° Direction: North-West

Tianyi, also designated as 7 Draconis , is a giant star in the constellation of Draco.

Tianyi visual magnitude is 5.43. Because of its reltive faintness, Tianyi 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 Tianyi:

Color of Tianyi ⬤

Magnitude of Tianyi 5.43

Class Giant

VISIBILITY RIGHT NOW

Tianyi - 7 Draconis is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 45.5°
Azimuth: 325.8°
Direction: North-West

Celestial coordinates and finder chart of Tianyi

Tianyi 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 Tianyi are provided in the following table:

Right Ascension J2000 12h 47m 34s

Declination J2000 +66° 47’ 25”

Galactic Longitude 123.53°

Galactic Latitude 50.33°

Constellation Draco

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

Simplified finder chart for Tianyi - 7 Draconis.

Visibility of Tianyi from your location

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

Tianyi - 7 Draconis is circumpolar and transits at 19:35 UTC (altitude: 74.7°)

Digitized Sky Survey image of Tianyi

The image below is a photograph of Tianyi 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 Tianyi is 0.01 arcsec per year in Right Ascension and -0.005 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of Tianyi. The red arrow shows the motion of Tianyi during the next 10000 years (1.67 arcmin in Right Ascension and -0.83 arcmin in declination);

Distance of Tianyi from the Sun and relative movement

Tianyi is distant 778.04 light years from the Sun and it is moving far from the Sun at the speed of 8 kilometers per second.

Distance (parsec) 238.66 pc

Distance (light year) 778.04 ly

Heliocentric radial velocity 8 km/s

Proper Motion RA 0.01 arcsec/year

Proper Motion Dec -0.005 arcsec/year

Spectral properties of Tianyi

Tianyi belongs to spectral class K5

Absolute magnitude -1.46

Spectral Type K5

Color Index (B-V) 1.56

Temperature of Tianyi 3705K

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

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

Alternative designations of Tianyi

Proper Name Tianyi

Flamsteed designation 7 Draconis

Henry Draper Catalogue HD111335

SAO Catalogue SAO15902

Hipparcos Catalogue HIP62423

Durchmusterung Catalogue BD+67 764

FK5 Catalogue 3020

In Evidence

Other stars in Draco