78 Pegasi

Altitude: -4.6° Azimuth: 27.1° Direction: North-North-East

78 Pegasi is a double hypergiant star in the constellation of Pegasus.

78 Pegasi visual magnitude is 4.93. Because of its moderate brightness, 78 Pegasi should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about 78 Pegasi:

Color of 78 Pegasi ⬤

Magnitude of 78 Pegasi 4.93

Class Hypergiant

VISIBILITY RIGHT NOW

78 Pegasi is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -4.6°
Azimuth: 27.1°
Direction: North-North-East

Celestial coordinates and finder chart of 78 Pegasi

78 Pegasi 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 78 Pegasi are provided in the following table:

Right Ascension J2000 23h 43m 59s

Declination J2000 +29° 21’ 42”

Galactic Longitude 105.73°

Galactic Latitude -31.25°

Constellation Pegasus

The simplified sky map below shows the position of 78 Pegasi in the sky:

Simplified finder chart for 78 Pegasi.

Visibility of 78 Pegasi 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 78 Pegasi 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: 60.6° RISE 15:13

Max altitude: 67.9° TRANSIT 0:10

Azimuth: 299.4° SET 9:11

Digitized Sky Survey image of 78 Pegasi

The image below is a photograph of 78 Pegasi 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 78 Pegasi is 0.071 arcsec per year in Right Ascension and -0.037 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of 78 Pegasi. The red arrow shows the motion of 78 Pegasi during the next 10000 years (11.83 arcmin in Right Ascension and -6.17 arcmin in declination);

Distance of 78 Pegasi from the Sun and relative movement

78 Pegasi is distant 234.36 light years from the Sun and it is moving towards the Sun at the speed of 7 kilometers per second.

Distance (parsec) 71.89 pc

Distance (light year) 234.36 ly

Heliocentric radial velocity -7 km/s

Proper Motion RA 0.071 arcsec/year

Proper Motion Dec -0.037 arcsec/year

Spectral properties of 78 Pegasi

78 Pegasi belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.

Absolute magnitude 0.65

Spectral Type K0III

Color Index (B-V) 0.95

Temperature of 78 Pegasi 4866K

The red dot in the diagram below shows where 78 Pegasi is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 78 Pegasi. Attribution: Richard Powell / CC BY-SA

78 Pegasi star system properties

78 Pegasi is a visual double star which can be observed with the help of large telescopes. The table below shows key information about the 78 Pegasi double sysyem:

Main star magnitude 4.93

Secondary star magnitude 8.03

Magnitude difference 3.1

Separation 0.9 arcsec

Alternative designations of 78 Pegasi

Flamsteed designation 78 Pegasi

Henry Draper Catalogue HD222842

SAO Catalogue SAO91457

Hipparcos Catalogue HIP117073

Durchmusterung Catalogue BD+28 4627

Aitken Double Star Catalogue ADS16957

Support us

In Evidence

Other stars in Pegasus