HR4040

HR4040 is a double main-sequence star in the constellation of Hydra.

HR4040 visual magnitude is 6.57. Because of its reltive faintness, HR4040 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 HR4040:

Color of HR4040 ⬤

Magnitude of HR4040 6.57

Class Main-sequence

VISIBILITY RIGHT NOW HR4040 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of HR4040

HR4040 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 HR4040 are provided in the following table:

Right Ascension J2000 10h 16m 45s

Declination J2000 -20° 40’ 14”

Galactic Longitude 260.84°

Galactic Latitude 29.29°

Constellation Hydra

The simplified sky map below shows the position of HR4040 in the sky:

Simplified finder chart for HR4040.

Visibility of HR4040 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 HR4040 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: 110.7° RISE 14:39

Max altitude: 17.8° TRANSIT 18:44

Azimuth: 249.3° SET 22:50

RIGHT NOW HR4040 is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR4040

The image below is a photograph of HR4040 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 HR4040 is -0.127 arcsec per year in Right Ascension and -0.038 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

DSS2 image of HR4040. The red arrow shows the motion of HR4040 during the next 1000 years (-2.12 arcmin in Right Ascension and -0.63 arcmin in declination);

Distance of HR4040 from the Sun and relative movement

HR4040 is distant 332.65 light years from the Sun and it is moving towards the Sun at the speed of 1 kilometers per second.

Distance (parsec) 102.04 pc

Distance (light year) 332.65 ly

Heliocentric radial velocity -1 km/s

Proper Motion RA -0.127 arcsec/year

Proper Motion Dec -0.038 arcsec/year

Spectral properties of HR4040

HR4040 belongs to spectral class F3 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude 1.53

Spectral Type F3V

Color Index (B-V) 0.48

Temperature of HR4040 6481K

The red dot in the diagram below shows where HR4040 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR4040. Attribution: Richard Powell / CC BY-SA

HR4040 star system properties

HR4040 is a visual double star which can be observed with the help of large telescopes. The table below shows key information about the HR4040 double sysyem:

Main star magnitude 6.57

Secondary star magnitude 10.07

Magnitude difference 3.5

Separation 1.3 arcsec

Alternative designations of HR4040

Henry Draper Catalogue HD89169

SAO Catalogue SAO178610

Hipparcos Catalogue HIP50340

Durchmusterung Catalogue BD-19 2964

Aitken Double Star Catalogue ADS7711

In Evidence

Other stars in Hydra