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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:38  
clear_day Transit: 11:46  
SunsetSet: 15:54 south
sunny DaytimeWhat's Visible Now?
All Constellations » Cancer » 

Tegmine - ζ1 Cancri (zeta1 Cancri)

Altitude: 21.4°   Azimuth: 271.7°   Direction: West

Tegmine, also designated as ζ1 Cancri (zeta1 Cancri), is a multiple main-sequence star in the constellation of Cancer.

Tegmine visual magnitude is 5.63. Because of its reltive faintness, Tegmine 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 Tegmine:


Tegmine - ζ1 Cancri (zeta1 Cancri) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 21.4°
Azimuth: 271.7°
Direction: West

Celestial coordinates and finder chart of Tegmine

Tegmine 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 Tegmine are provided in the following table:

08h 12m 12s
+17° 38’ 52”

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

Finder chart Tegmine - ζ1 Cancri (zeta1 Cancri) star
Simplified finder chart for Tegmine - ζ1 Cancri (zeta1 Cancri).

Visibility of Tegmine from your location

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

Today's Tegmine - ζ1 Cancri (zeta1 Cancri) rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 72.4°
Max altitude: 56.2°
Azimuth: 287.6°

Digitized Sky Survey image of Tegmine

The image below is a photograph of Tegmine 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 Tegmine is 0.066 arcsec per year in Right Ascension and -0.135 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of Tegmine - ζ1 Cancri (zeta1 Cancri) star
DSS2 image of Tegmine. The red arrow shows the motion of Tegmine during the next 1000 years (1.10 arcmin in Right Ascension and -2.25 arcmin in declination);

Spectral properties of Tegmine

Tegmine belongs to spectral class F8 and has a luminosity class of V corresponding to a main-sequence star.


Tegmine star system properties

Tegmine is a visual double star which can be observed with the help of large telescopes. The table below shows key information about the Tegmine double sysyem:

0.9 arcsec

Alternative designations of Tegmine

ζ1 Cancri
(zeta1 Cancri)