HR1831

Altitude: -15.9° Azimuth: 5.1° Direction: North

HR1831 is a hypergiant star in the constellation of Taurus.

HR1831 visual magnitude is 6.29. Because of its reltive faintness, HR1831 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 HR1831:

Color of HR1831 ⬤

Magnitude of HR1831 6.29

Class Hypergiant

VISIBILITY RIGHT NOW

HR1831 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -15.9°
Azimuth: 5.1°
Direction: North

Celestial coordinates and finder chart of HR1831

HR1831 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 HR1831 are provided in the following table:

Right Ascension J2000 05h 30m 43s

Declination J2000 +22° 27’ 44”

Galactic Longitude 183.7°

Galactic Latitude -6.29°

Constellation Taurus

The simplified sky map below shows the position of HR1831 in the sky:

Simplified finder chart for HR1831.

Visibility of HR1831 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 HR1831 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: 67.5° RISE 22:13

Max altitude: 61.0° TRANSIT 6:19

Azimuth: 292.5° SET 14:22

Digitized Sky Survey image of HR1831

The image below is a photograph of HR1831 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 HR1831 is 0.043 arcsec per year in Right Ascension and -0.016 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR1831. The red arrow shows the motion of HR1831 during the next 10000 years (7.17 arcmin in Right Ascension and -2.67 arcmin in declination);

Distance of HR1831 from the Sun and relative movement

HR1831 is distant 394.67 light years from the Sun and it is moving far from the Sun at the speed of 2 kilometers per second.

Distance (parsec) 121.07 pc

Distance (light year) 394.67 ly

Heliocentric radial velocity 2 km/s

Proper Motion RA 0.043 arcsec/year

Proper Motion Dec -0.016 arcsec/year

Spectral properties of HR1831

HR1831 belongs to spectral class K0

Absolute magnitude 0.87

Spectral Type K0

Color Index (B-V) 1.18

Temperature of HR1831 4348K

The red dot in the diagram below shows where HR1831 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR1831. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR1831

Henry Draper Catalogue HD36160

SAO Catalogue SAO77220

Hipparcos Catalogue HIP25806

Durchmusterung Catalogue BD+22 925

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