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Chamukuy - θ2 Tauri (theta2 Tauri)

Chamukuy, also designated as θ2 Tauri (theta2 Tauri), is a variable and multiple giant star in the constellation of Taurus.

Chamukuy visual magnitude is 3.4. Because of its moderate brightness, Chamukuy should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about Chamukuy:

Color of Chamukuy ⬤

Magnitude of Chamukuy 3.4

Class Giant

VISIBILITY RIGHT NOW Chamukuy - θ2 Tauri (theta2 Tauri) is above the horizon from Greenwich, United Kingdom [change]. Altitude: 16°.

Celestial coordinates and finder chart of Chamukuy

Chamukuy 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 Chamukuy are provided in the following table:

Right Ascension J2000 04h 28m 39s

Declination J2000 +15° 52’ 14”

Galactic Longitude 180.35°

Galactic Latitude -22.01°

Constellation Taurus

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

Finder chart Chamukuy - θ2 Tauri (theta2 Tauri) star

Simplified finder chart for Chamukuy - θ2 Tauri (theta2 Tauri).

Visibility of Chamukuy from your location

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

Today's Chamukuy - θ2 Tauri (theta2 Tauri) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 74.1° RISE 9:48

Max altitude: 54.4° TRANSIT 17:09

Azimuth: 285.9° SET 0:30

RIGHT NOW Chamukuy - θ2 Tauri (theta2 Tauri) is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of Chamukuy

The image below is a photograph of Chamukuy 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 Chamukuy is 0.103 arcsec per year in Right Ascension and -0.025 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of Chamukuy - θ2 Tauri (theta2 Tauri) star

DSS2 image of Chamukuy. The red arrow shows the motion of Chamukuy during the next 1000 years (1.72 arcmin in Right Ascension and -0.42 arcmin in declination);

Distance of Chamukuy from the Sun and relative movement

Chamukuy is distant 148.93 light years from the Sun and it is moving far from the Sun at the speed of 40 kilometers per second.

Distance (parsec) 45.68 pc

Distance (light year) 148.93 ly

Heliocentric radial velocity 40 km/s

Proper Motion RA 0.103 arcsec/year

Proper Motion Dec -0.025 arcsec/year

Spectral properties of Chamukuy

Chamukuy belongs to spectral class A7 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude 0.10

Spectral Type A7III

Color Index (B-V) 0.18

Temperature of Chamukuy 8321K

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

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

Chamukuy star system properties

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

Main star magnitude 3.4

Secondary star magnitude 3.8

Magnitude difference 0.4

Separation 337.4 arcsec

Alternative designations of Chamukuy

Proper Name Chamukuy

Bayer designation θ2 Tauri
(theta2 Tauri)

Flamsteed designation 78 Tauri

Henry Draper Catalogue HD28319

SAO Catalogue SAO93957

Hipparcos Catalogue HIP20894

Durchmusterung Catalogue BD+15 632

General Catalogue of Variable Stars The2 Tau

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