HR8157

HR8157 is a variable bright giant star in the constellation of Cygnus.

HR8157 visual magnitude is 5.83. Because of its reltive faintness, HR8157 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 HR8157:

Color of HR8157 ⬤

Magnitude of HR8157 5.83

Class Bright giant

VISIBILITY RIGHT NOW HR8157 is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 2°.

Celestial coordinates and finder chart of HR8157

HR8157 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 HR8157 are provided in the following table:

Right Ascension J2000 21h 19m 22s

Declination J2000 +38° 14’ 14”

Galactic Longitude 83.62°

Galactic Latitude -7.95°

Constellation Cygnus

The simplified sky map below shows the position of HR8157 in the sky:

Simplified finder chart for HR8157.

Visibility of HR8157 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 HR8157 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: 51.8° RISE 18:14

Max altitude: 76.8° TRANSIT 5:41

Azimuth: 308.2° SET 17:05

RIGHT NOW HR8157 is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR8157

The image below is a photograph of HR8157 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 HR8157 is 0.011 arcsec per year in Right Ascension and -0.006 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR8157. The red arrow shows the motion of HR8157 during the next 10000 years (1.83 arcmin in Right Ascension and -1.00 arcmin in declination);

Distance of HR8157 from the Sun and relative movement

HR8157 is distant 3,505.38 light years from the Sun and it is moving far from the Sun at the speed of 8 kilometers per second.

Distance (parsec) 1,075.27 pc

Distance (light year) 3,505.38 ly

Heliocentric radial velocity 8 km/s

Proper Motion RA 0.011 arcsec/year

Proper Motion Dec -0.006 arcsec/year

Spectral properties of HR8157

HR8157 belongs to spectral class F1 and has a luminosity class of II corresponding to a bright giant star.

Absolute magnitude -4.33

Spectral Type F1II

Color Index (B-V) 0.5

Temperature of HR8157 6389K

The red dot in the diagram below shows where HR8157 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR8157. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR8157

Henry Draper Catalogue HD203156

SAO Catalogue SAO71203

Hipparcos Catalogue HIP105269

Durchmusterung Catalogue BD+37 4271

General Catalogue of Variable Stars V1334 Cyg

Aitken Double Star Catalogue ADS14859

In Evidence

Other stars in Cygnus