HR4158

Altitude: -25.2° Azimuth: 77.5° Direction: East-North-East

HR4158 is a double main-sequence star in the constellation of Hydra.

HR4158 visual magnitude is 5.7. Because of its reltive faintness, HR4158 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 HR4158:

Color of HR4158 ⬤

Magnitude of HR4158 5.7

Class Main-sequence

VISIBILITY RIGHT NOW

HR4158 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -25.2°
Azimuth: 77.5°
Direction: East-North-East

Celestial coordinates and finder chart of HR4158

HR4158 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 HR4158 are provided in the following table:

Right Ascension J2000 10h 36m 32s

Declination J2000 -12° 13’ 49”

Galactic Longitude 258.78°

Galactic Latitude 38.82°

Constellation Hydra

The simplified sky map below shows the position of HR4158 in the sky:

Simplified finder chart for HR4158.

Visibility of HR4158 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 HR4158 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: 102.2° RISE 13:49

Max altitude: 26.3° TRANSIT 18:44

Azimuth: 257.8° SET 23:40

RIGHT NOW HR4158 is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR4158

The image below is a photograph of HR4158 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 HR4158 is 0.268 arcsec per year in Right Ascension and -0.673 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

DSS2 image of HR4158. The red arrow shows the motion of HR4158 during the next 1000 years (4.47 arcmin in Right Ascension and -11.22 arcmin in declination);

Distance of HR4158 from the Sun and relative movement

HR4158 is distant 80.16 light years from the Sun and it is moving towards the Sun at the speed of 6 kilometers per second.

Distance (parsec) 24.59 pc

Distance (light year) 80.16 ly

Heliocentric radial velocity -6 km/s

Proper Motion RA 0.268 arcsec/year

Proper Motion Dec -0.673 arcsec/year

Spectral properties of HR4158

HR4158 belongs to spectral class F7 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude 3.75

Spectral Type F7V

Color Index (B-V) 0.52

Temperature of HR4158 6300K

The red dot in the diagram below shows where HR4158 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR4158. Attribution: Richard Powell / CC BY-SA

HR4158 star system properties

HR4158 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 HR4158 double sysyem:

Main star magnitude 5.7

Secondary star magnitude 10.8

Magnitude difference 5.1

Separation 14.4 arcsec

Alternative designations of HR4158

Henry Draper Catalogue HD91889

SAO Catalogue SAO156095

Hipparcos Catalogue HIP51933

Durchmusterung Catalogue BD-11 2918

Gliese Catalogue Gl 398.1

FK5 Catalogue 1274

In Evidence

Other stars in Hydra