χ1 Hydrae (chi1 Hydrae)

χ1 Hydrae is a double sub-giant star in the constellation of Hydra.

χ1 Hydrae visual magnitude is 4.94. Because of its moderate brightness, χ1 Hydrae 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 χ1 Hydrae:

Color of χ1 Hydrae ⬤

Magnitude of χ1 Hydrae 4.94

Class Sub-giant

VISIBILITY RIGHT NOW χ1 Hydrae (chi1 Hydrae) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of χ1 Hydrae

χ1 Hydrae is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of χ1 Hydrae are provided in the following table:

Right Ascension J2000 11h 05m 19s

Declination J2000 -27° 17’ 36”

Galactic Longitude 275.69°

Galactic Latitude 29.91°

Constellation Hydra

The simplified sky map below shows the position of χ1 Hydrae in the sky:

Finder chart χ1 Hydrae (chi1 Hydrae) star

Simplified finder chart for χ1 Hydrae (chi1 Hydrae).

Visibility of χ1 Hydrae 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 χ1 Hydrae (chi1 Hydrae) 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: 117.3° RISE 16:15

Max altitude: 11.2° TRANSIT 19:33

Azimuth: 242.7° SET 22:50

RIGHT NOW χ1 Hydrae (chi1 Hydrae) is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of χ1 Hydrae

The image below is a photograph of χ1 Hydrae 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 χ1 Hydrae is -0.188 arcsec per year in Right Ascension and -0.004 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

DSS2 image of χ1 Hydrae. The red arrow shows the motion of χ1 Hydrae during the next 1000 years (-3.13 arcmin in Right Ascension and -0.07 arcmin in declination);

Distance of χ1 Hydrae from the Sun and relative movement

χ1 Hydrae is distant 141.86 light years from the Sun and it is moving far from the Sun at the speed of 17 kilometers per second.

Distance (parsec) 43.52 pc

Distance (light year) 141.86 ly

Heliocentric radial velocity 17 km/s

Proper Motion RA -0.188 arcsec/year

Proper Motion Dec -0.004 arcsec/year

Spectral properties of χ1 Hydrae

χ1 Hydrae belongs to spectral class F3 and has a luminosity class of IV corresponding to a sub-giant star.

Absolute magnitude 1.75

Spectral Type F3IV

Color Index (B-V) 0.36

Temperature of χ1 Hydrae 7101K

The red dot in the diagram below shows where χ1 Hydrae is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of χ1 Hydrae. Attribution: Richard Powell / CC BY-SA

χ1 Hydrae star system properties

χ1 Hydrae is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the χ1 Hydrae double sysyem:

Main star magnitude 4.94

Secondary star magnitude 5.04

Magnitude difference 0.1

Separation 0.2 arcsec

Alternative designations of χ1 Hydrae

Bayer designation χ1 Hydrae
(chi1 Hydrae)

Henry Draper Catalogue HD96202

SAO Catalogue SAO179514

Hipparcos Catalogue HIP54204

Durchmusterung Catalogue CD-26 8338

Gliese Catalogue NN 3642 A

FK5 Catalogue 419

In Evidence

Other stars in Hydra