HR4172

HR4172 is a hypergiant star in the constellation of Hydra.

HR4172 visual magnitude is 6.04. Because of its reltive faintness, HR4172 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 HR4172:

Color of HR4172 ⬤

Magnitude of HR4172 6.04

Class Hypergiant

VISIBILITY RIGHT NOW HR4172 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of HR4172

HR4172 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 HR4172 are provided in the following table:

Right Ascension J2000 10h 38m 50s

Declination J2000 -12° 26’ 36”

Galactic Longitude 259.53°

Galactic Latitude 39°

Constellation Hydra

The simplified sky map below shows the position of HR4172 in the sky:

Simplified finder chart for HR4172.

Visibility of HR4172 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 HR4172 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: 102.4° RISE 14:04

Max altitude: 26.1° TRANSIT 18:58

Azimuth: 257.6° SET 23:53

RIGHT NOW HR4172 is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR4172

The image below is a photograph of HR4172 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 HR4172 is -0.057 arcsec per year in Right Ascension and 0.002 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR4172. The red arrow shows the motion of HR4172 during the next 10000 years (-9.50 arcmin in Right Ascension and 0.33 arcmin in declination);

Distance of HR4172 from the Sun and relative movement

HR4172 is distant 358.64 light years from the Sun and it is moving far from the Sun at the speed of 12 kilometers per second.

Distance (parsec) 110.01 pc

Distance (light year) 358.64 ly

Heliocentric radial velocity 12 km/s

Proper Motion RA -0.057 arcsec/year

Proper Motion Dec 0.002 arcsec/year

Spectral properties of HR4172

HR4172 belongs to spectral class A0 and has a luminosity class of V corresponding to a hypergiant star.

Absolute magnitude 0.83

Spectral Type A0V

Color Index (B-V) 0

Temperature of HR4172 10125K

The red dot in the diagram below shows where HR4172 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR4172. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4172

Henry Draper Catalogue HD92245

SAO Catalogue SAO156124

Hipparcos Catalogue HIP52113

Durchmusterung Catalogue BD-11 2925

In Evidence

Other stars in Hydra