Zhang - υ1 Hydrae (upsilon1 Hydrae)

Zhang, also designated as υ1 Hydrae (upsilon1 Hydrae), is a giant star in the constellation of Hydra.

Zhang visual magnitude is 4.12. Because of its moderate brightness, Zhang 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 Zhang:

Color of Zhang ⬤

Magnitude of Zhang 4.12

Class Giant

VISIBILITY RIGHT NOW Zhang - υ1 Hydrae (upsilon1 Hydrae) is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of Zhang

Zhang 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 Zhang are provided in the following table:

Right Ascension J2000 09h 51m 28s

Declination J2000 -14° 50’ 48”

Galactic Longitude 251.23°

Galactic Latitude 29.44°

Constellation Hydra

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

Finder chart Zhang - υ1 Hydrae (upsilon1 Hydrae) star

Simplified finder chart for Zhang - υ1 Hydrae (upsilon1 Hydrae).

Visibility of Zhang from your location

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

Today's Zhang - υ1 Hydrae (upsilon1 Hydrae) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 104.8° RISE 17:06

Max altitude: 23.7° TRANSIT 21:46

Azimuth: 255.2° SET 2:31

RIGHT NOW Zhang - υ1 Hydrae (upsilon1 Hydrae) is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of Zhang

The image below is a photograph of Zhang 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 Zhang is 0.017 arcsec per year in Right Ascension and -0.026 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of Zhang - υ1 Hydrae (upsilon1 Hydrae) star

DSS2 image of Zhang. The red arrow shows the motion of Zhang during the next 10000 years (2.83 arcmin in Right Ascension and -4.33 arcmin in declination);

Distance of Zhang from the Sun and relative movement

Zhang is distant 273.49 light years from the Sun and it is moving towards the Sun at the speed of 15 kilometers per second.

Distance (parsec) 83.89 pc

Distance (light year) 273.49 ly

Heliocentric radial velocity -15 km/s

Proper Motion RA 0.017 arcsec/year

Proper Motion Dec -0.026 arcsec/year

Spectral properties of Zhang

Zhang belongs to spectral class G7 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -0.50

Spectral Type G7III

Color Index (B-V) 0.92

Temperature of Zhang 4943K

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

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

Alternative designations of Zhang

Proper Name Zhang

Bayer designation υ1 Hydrae
(upsilon1 Hydrae)

Flamsteed designation 39 Hydrae

Henry Draper Catalogue HD85444

SAO Catalogue SAO155542

Hipparcos Catalogue HIP48356

Durchmusterung Catalogue BD-14 2963

FK5 Catalogue 2786

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