HR4458

HR4458 is a hypergiant star in the constellation of Hydra.

HR4458 visual magnitude is 5.98. Because of its reltive faintness, HR4458 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 HR4458:

Color of HR4458 ⬤

Magnitude of HR4458 5.98

Class Hypergiant

VISIBILITY RIGHT NOW HR4458 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of HR4458

HR4458 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 HR4458 are provided in the following table:

Right Ascension J2000 11h 34m 29s

Declination J2000 -32° 49’ 53”

Galactic Longitude 284.79°

Galactic Latitude 27.31°

Constellation Hydra

The simplified sky map below shows the position of HR4458 in the sky:

Simplified finder chart for HR4458.

Visibility of HR4458 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 HR4458 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: 122.8° RISE 17:47

Max altitude: 5.7° TRANSIT 20:10

Azimuth: 237.2° SET 22:32

RIGHT NOW HR4458 is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR4458

The image below is a photograph of HR4458 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 HR4458 is -0.674 arcsec per year in Right Ascension and 0.826 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

DSS2 image of HR4458. The red arrow shows the motion of HR4458 during the next 1000 years (-11.23 arcmin in Right Ascension and 13.77 arcmin in declination);

Distance of HR4458 from the Sun and relative movement

HR4458 is distant 31.10 light years from the Sun and it is moving towards the Sun at the speed of 23 kilometers per second.

Distance (parsec) 9.54 pc

Distance (light year) 31.10 ly

Heliocentric radial velocity -23 km/s

Proper Motion RA -0.674 arcsec/year

Proper Motion Dec 0.826 arcsec/year

Spectral properties of HR4458

HR4458 belongs to spectral class K0 and has a luminosity class of V corresponding to a hypergiant star.

Absolute magnitude 6.08

Spectral Type K0V

Color Index (B-V) 0.81

Temperature of HR4458 5251K

The red dot in the diagram below shows where HR4458 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR4458. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4458

Henry Draper Catalogue HD100623

SAO Catalogue SAO202583

Hipparcos Catalogue HIP56452

Durchmusterung Catalogue CD-32 8179

Gliese Catalogue Gl 432 A

In Evidence

Other stars in Hydra