2 Pegasi

2 Pegasi is a double giant star in the constellation of Pegasus.

2 Pegasi visual magnitude is 4.57. Because of its moderate brightness, 2 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 2 Pegasi:

Color of 2 Pegasi ⬤

Magnitude of 2 Pegasi 4.57

Class Giant

VISIBILITY RIGHT NOW 2 Pegasi is above the horizon from Greenwich, United Kingdom [change]. Altitude: 49°.

Celestial coordinates and finder chart of 2 Pegasi

2 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 2 Pegasi are provided in the following table:

Right Ascension J2000 21h 29m 56s

Declination J2000 +23° 38’ 20”

Galactic Longitude 74.39°

Galactic Latitude -19.7°

Constellation Pegasus

The simplified sky map below shows the position of 2 Pegasi in the sky:

Simplified finder chart for 2 Pegasi.

Visibility of 2 Pegasi from your location

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

Today's 2 Pegasi rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 66.4° RISE 1:57

Max altitude: 62.2° TRANSIT 10:07

Azimuth: 293.6° SET 18:18

RIGHT NOW 2 Pegasi is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 2 Pegasi

The image below is a photograph of 2 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 2 Pegasi is 0.024 arcsec per year in Right Ascension and 0.004 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of 2 Pegasi. The red arrow shows the motion of 2 Pegasi during the next 10000 years (4.00 arcmin in Right Ascension and 0.67 arcmin in declination);

Distance of 2 Pegasi from the Sun and relative movement

2 Pegasi is distant 442.33 light years from the Sun and it is moving towards the Sun at the speed of 19 kilometers per second.

Distance (parsec) 135.69 pc

Distance (light year) 442.33 ly

Heliocentric radial velocity -19 km/s

Proper Motion RA 0.024 arcsec/year

Proper Motion Dec 0.004 arcsec/year

Spectral properties of 2 Pegasi

2 Pegasi belongs to spectral class M1 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -1.09

Spectral Type M1III

Color Index (B-V) 1.62

Temperature of 2 Pegasi 3622K

The red dot in the diagram below shows where 2 Pegasi is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 2 Pegasi. Attribution: Richard Powell / CC BY-SA

2 Pegasi star system properties

2 Pegasi is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the 2 Pegasi double sysyem:

Main star magnitude 4.57

Secondary star magnitude 12.67

Magnitude difference 8.1

Separation 29.8 arcsec

Alternative designations of 2 Pegasi

Flamsteed designation 2 Pegasi

Henry Draper Catalogue HD204724

SAO Catalogue SAO89752

Hipparcos Catalogue HIP106140

Durchmusterung Catalogue BD+23 4325

FK5 Catalogue 1565

Aitken Double Star Catalogue ADS15027

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Other stars in Pegasus