HR3704

HR3704 is a double giant star in the constellation of Hydra.

HR3704 visual magnitude is 5.78. Because of its reltive faintness, HR3704 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 HR3704:

Color of HR3704 ⬤

Magnitude of HR3704 5.78

Class Giant

VISIBILITY RIGHT NOW HR3704 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of HR3704

HR3704 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 HR3704 are provided in the following table:

Right Ascension J2000 09h 19m 33s

Declination J2000 -15° 50’ 03”

Galactic Longitude 246.36°

Galactic Latitude 23.03°

Constellation Hydra

The simplified sky map below shows the position of HR3704 in the sky:

Simplified finder chart for HR3704.

Visibility of HR3704 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 HR3704 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: 105.8° RISE 13:20

Max altitude: 22.7° TRANSIT 17:55

Azimuth: 254.2° SET 22:30

RIGHT NOW HR3704 is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR3704

The image below is a photograph of HR3704 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 HR3704 is 0.052 arcsec per year in Right Ascension and -0.046 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR3704. The red arrow shows the motion of HR3704 during the next 10000 years (8.67 arcmin in Right Ascension and -7.67 arcmin in declination);

Distance of HR3704 from the Sun and relative movement

HR3704 is distant 400.49 light years from the Sun and it is moving towards the Sun at the speed of 30 kilometers per second.

Distance (parsec) 122.85 pc

Distance (light year) 400.49 ly

Heliocentric radial velocity -30 km/s

Proper Motion RA 0.052 arcsec/year

Proper Motion Dec -0.046 arcsec/year

Spectral properties of HR3704

HR3704 belongs to spectral class K4 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude 0.33

Spectral Type K4III

Color Index (B-V) 1.29

Temperature of HR3704 4139K

The red dot in the diagram below shows where HR3704 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR3704. Attribution: Richard Powell / CC BY-SA

HR3704 star system properties

HR3704 is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the HR3704 double sysyem:

Main star magnitude 5.78

Secondary star magnitude 10.78

Magnitude difference 5

Separation 4.1 arcsec

Alternative designations of HR3704

Henry Draper Catalogue HD80479

SAO Catalogue SAO155091

Hipparcos Catalogue HIP45743

Durchmusterung Catalogue BD-15 2763

Aitken Double Star Catalogue ADS7302

In Evidence

Other stars in Hydra