1 Pegasi

1 Pegasi is a multiple giant star in the constellation of Pegasus.

1 Pegasi visual magnitude is 4.08. Because of its moderate brightness, 1 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 1 Pegasi:

Color of 1 Pegasi ⬤

Magnitude of 1 Pegasi 4.08

Class Giant

VISIBILITY RIGHT NOW 1 Pegasi is above the horizon from Greenwich, United Kingdom [change]. Altitude: 30°.

Celestial coordinates and finder chart of 1 Pegasi

1 Pegasi 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 1 Pegasi are provided in the following table:

Right Ascension J2000 21h 22m 05s

Declination J2000 +19° 48’ 15”

Galactic Longitude 70.05°

Galactic Latitude -20.92°

Constellation Pegasus

The simplified sky map below shows the position of 1 Pegasi in the sky:

Simplified finder chart for 1 Pegasi.

Visibility of 1 Pegasi from your location

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

Today's 1 Pegasi rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 70.2° RISE 1:26

Max altitude: 58.3° TRANSIT 9:11

Azimuth: 289.8° SET 16:56

RIGHT NOW 1 Pegasi is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 1 Pegasi

The image below is a photograph of 1 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 1 Pegasi is 0.106 arcsec per year in Right Ascension and 0.064 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

DSS2 image of 1 Pegasi. The red arrow shows the motion of 1 Pegasi during the next 1000 years (1.77 arcmin in Right Ascension and 1.07 arcmin in declination);

Distance of 1 Pegasi from the Sun and relative movement

1 Pegasi is distant 153.85 light years from the Sun and it is moving towards the Sun at the speed of 76 kilometers per second.

Distance (parsec) 47.19 pc

Distance (light year) 153.85 ly

Heliocentric radial velocity -76 km/s

Proper Motion RA 0.106 arcsec/year

Proper Motion Dec 0.064 arcsec/year

Spectral properties of 1 Pegasi

1 Pegasi belongs to spectral class K1 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude 0.71

Spectral Type K1III

Color Index (B-V) 1.11

Temperature of 1 Pegasi 4493K

The red dot in the diagram below shows where 1 Pegasi is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 1 Pegasi. Attribution: Richard Powell / CC BY-SA

1 Pegasi star system properties

1 Pegasi is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the 1 Pegasi double sysyem:

Main star magnitude 4.08

Secondary star magnitude 8.98

Magnitude difference 4.9

Separation 36.2 arcsec

Alternative designations of 1 Pegasi

Flamsteed designation 1 Pegasi

Henry Draper Catalogue HD203504

SAO Catalogue SAO107073

Hipparcos Catalogue HIP105502

Durchmusterung Catalogue BD+19 4691

FK5 Catalogue 804

Aitken Double Star Catalogue ADS14909

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Other stars in Pegasus