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🌎 Location: Greenwich, United Kingdom [change]

78 Pegasi

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:

4.93
Hypergiant
78 Pegasi is above the horizon from Greenwich, United Kingdom [change]. Altitude: 68°.

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:

23h 43m 59s
+29° 21’ 42”
105.73°
-31.25°
Pegasus

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

Finder chart 78 Pegasi star
Simplified finder chart for 78 Pegasi.

Visibility of 78 Pegasi from your location

Location: Greenwich, United Kingdom [change]
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 [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 60.6°
Max altitude: 67.9°
Azimuth: 299.4°
78 Pegasi is above the horizon from Greenwich, United Kingdom

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.

Image of 78 Pegasi star
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.

71.89 pc
234.36 ly
-7 km/s
0.071 arcsec/year
-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.

0.65
K0III
4866K

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

HR 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:

4.93
8.03
3.1
0.9 arcsec

Alternative designations of 78 Pegasi

SAO91457
SAO91457