2 Andromedae

2 Andromedae is a variable and multiple main-sequence star in the constellation of Andromeda.

2 Andromedae visual magnitude is 5.1. Because of its reltive faintness, 2 Andromedae 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 2 Andromedae:

Color of 2 Andromedae ⬤

Magnitude of 2 Andromedae 5.1

Class Main-sequence

VISIBILITY RIGHT NOW 2 Andromedae is above the horizon from Greenwich, United Kingdom [change]. Altitude: 73°.

Celestial coordinates and finder chart of 2 Andromedae

2 Andromedae 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 2 Andromedae are provided in the following table:

Right Ascension J2000 23h 02m 36s

Declination J2000 +42° 45’ 28”

Galactic Longitude 102.52°

Galactic Latitude -15.76°

Constellation Andromeda

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

Simplified finder chart for 2 Andromedae.

Visibility of 2 Andromedae from your location

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

2 Andromedae is circumpolar and transits at 10:40 UTC (altitude: 81.3°)

Digitized Sky Survey image of 2 Andromedae

The image below is a photograph of 2 Andromedae 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 Andromedae is 0.055 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 Andromedae. The red arrow shows the motion of 2 Andromedae during the next 10000 years (9.17 arcmin in Right Ascension and -0.67 arcmin in declination);

Distance of 2 Andromedae from the Sun and relative movement

2 Andromedae is distant 349.41 light years from the Sun and it is moving far from the Sun at the speed of 2 kilometers per second.

Distance (parsec) 107.18 pc

Distance (light year) 349.41 ly

Heliocentric radial velocity 2 km/s

Proper Motion RA 0.055 arcsec/year

Proper Motion Dec -0.004 arcsec/year

Spectral properties of 2 Andromedae

2 Andromedae belongs to spectral class A3 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude -0.05

Spectral Type A3V

Color Index (B-V) 0.09

Temperature of 2 Andromedae 9125K

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

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

2 Andromedae star system properties

2 Andromedae 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 Andromedae double sysyem:

Main star magnitude 5.1

Secondary star magnitude 8.8

Magnitude difference 3.7

Separation 0.4 arcsec

Alternative designations of 2 Andromedae

Flamsteed designation 2 Andromedae

Henry Draper Catalogue HD217782

SAO Catalogue SAO52623

Hipparcos Catalogue HIP113788

Durchmusterung Catalogue BD+41 4665

Gliese Catalogue Gl 886.1A

General Catalogue of Variable Stars 14396

Aitken Double Star Catalogue ADS16467

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Other stars in Andromeda