θ Cancri (theta Cancri)

θ Cancri is a variable and multiple giant star in the constellation of Cancer.

θ Cancri visual magnitude is 5.35. Because of its reltive faintness, θ Cancri 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 θ Cancri:

Color of θ Cancri ⬤

Magnitude of θ Cancri 5.35

Class Giant

VISIBILITY RIGHT NOW θ Cancri (theta Cancri) is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of θ Cancri

θ Cancri is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of θ Cancri are provided in the following table:

Right Ascension J2000 08h 31m 35s

Declination J2000 +18° 05’ 39”

Galactic Longitude 206.77°

Galactic Latitude 29.98°

Constellation Cancer

The simplified sky map below shows the position of θ Cancri in the sky:

Finder chart θ Cancri (theta Cancri) star

Simplified finder chart for θ Cancri (theta Cancri).

Visibility of θ Cancri from your location

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

Today's θ Cancri (theta Cancri) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 71.9° RISE 12:52

Max altitude: 56.6° TRANSIT 20:27

Azimuth: 288.1° SET 4:05

RIGHT NOW θ Cancri (theta Cancri) is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of θ Cancri

The image below is a photograph of θ Cancri 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 θ Cancri is -0.061 arcsec per year in Right Ascension and -0.058 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of θ Cancri. The red arrow shows the motion of θ Cancri during the next 10000 years (-10.17 arcmin in Right Ascension and -9.67 arcmin in declination);

Distance of θ Cancri from the Sun and relative movement

θ Cancri is distant 493.94 light years from the Sun and it is moving far from the Sun at the speed of 45 kilometers per second.

Distance (parsec) 151.52 pc

Distance (light year) 493.94 ly

Heliocentric radial velocity 45 km/s

Proper Motion RA -0.061 arcsec/year

Proper Motion Dec -0.058 arcsec/year

Spectral properties of θ Cancri

θ Cancri belongs to spectral class K5 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -0.55

Spectral Type K5III

Color Index (B-V) 1.56

Temperature of θ Cancri 3705K

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

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

Alternative designations of θ Cancri

Bayer designation θ Cancri
(theta Cancri)

Flamsteed designation 31 Cancri

Henry Draper Catalogue HD72094

SAO Catalogue SAO97881

Hipparcos Catalogue HIP41822

Durchmusterung Catalogue BD+18 1963

FK5 Catalogue 2667

General Catalogue of Variable Stars 4117

How to support us

In Evidence

Other stars in Cancer