HR181

Altitude: 70.6° Azimuth: 304.4° Direction: North-West

HR181 is a giant star in the constellation of Cassiopeia.

HR181 visual magnitude is 6.17. Because of its reltive faintness, HR181 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 HR181:

Color of HR181 ⬤

Magnitude of HR181 6.17

Class Giant

VISIBILITY RIGHT NOW

HR181 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 70.6°
Azimuth: 304.4°
Direction: North-West

Celestial coordinates and finder chart of HR181

HR181 is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR181 are provided in the following table:

Right Ascension J2000 00h 42m 31s

Declination J2000 +58° 45’ 11”

Galactic Longitude 121.77°

Galactic Latitude -4.1°

Constellation Cassiopeia

The simplified sky map below shows the position of HR181 in the sky:

Simplified finder chart for HR181.

Visibility of HR181 from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

HR181 is circumpolar and transits at 07:52 UTC (altitude: 82.7°)

Digitized Sky Survey image of HR181

The image below is a photograph of HR181 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 HR181 is 0.036 arcsec per year in Right Ascension and -0.007 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR181. The red arrow shows the motion of HR181 during the next 10000 years (6.00 arcmin in Right Ascension and -1.17 arcmin in declination);

Distance of HR181 from the Sun and relative movement

HR181 is distant 1,015.58 light years from the Sun and it is moving towards the Sun at the speed of 3 kilometers per second.

Distance (parsec) 311.53 pc

Distance (light year) 1,015.58 ly

Heliocentric radial velocity -3 km/s

Proper Motion RA 0.036 arcsec/year

Proper Motion Dec -0.007 arcsec/year

Spectral properties of HR181

HR181 belongs to spectral class B9 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -1.30

Spectral Type B9III

Color Index (B-V) -0.01

Temperature of HR181 10252K

The red dot in the diagram below shows where HR181 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR181. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR181

Henry Draper Catalogue HD3924

SAO Catalogue SAO21642

Hipparcos Catalogue HIP3334

Durchmusterung Catalogue BD+57 132

In Evidence

Other stars in Cassiopeia