φ Andromedae (phi Andromedae)

φ Andromedae is a variable and double main-sequence star in the constellation of Andromeda.

φ Andromedae visual magnitude is 4.25. Because of its moderate brightness, φ Andromedae 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 φ Andromedae:

Color of φ Andromedae ⬤

Magnitude of φ Andromedae 4.25

Class Main-sequence

VISIBILITY RIGHT NOW φ Andromedae (phi Andromedae) is above the horizon from Greenwich, United Kingdom [change]. Altitude: 56°.

Celestial coordinates and finder chart of φ Andromedae

φ 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 φ Andromedae are provided in the following table:

Right Ascension J2000 01h 09m 30s

Declination J2000 +47° 14’ 30”

Galactic Longitude 126.11°

Galactic Latitude -15.52°

Constellation Andromeda

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

Finder chart φ Andromedae (phi Andromedae) star

Simplified finder chart for φ Andromedae (phi Andromedae).

Visibility of φ Andromedae from your location

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

φ Andromedae (phi Andromedae) is circumpolar and transits at 12:46 UTC (altitude: 85.8°)

Digitized Sky Survey image of φ Andromedae

The image below is a photograph of φ 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 φ Andromedae is 0.01 arcsec per year in Right Ascension and -0.009 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of φ Andromedae (phi Andromedae) star

DSS2 image of φ Andromedae. The red arrow shows the motion of φ Andromedae during the next 10000 years (1.67 arcmin in Right Ascension and -1.50 arcmin in declination);

Distance of φ Andromedae from the Sun and relative movement

φ Andromedae is distant 735.89 light years from the Sun

Distance (parsec) 225.73 pc

Distance (light year) 735.89 ly

Proper Motion RA 0.01 arcsec/year

Proper Motion Dec -0.009 arcsec/year

Spectral properties of φ Andromedae

φ Andromedae belongs to spectral class B7 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude -2.52

Spectral Type B7V

Color Index (B-V) -0.07

Temperature of φ Andromedae 11092K

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

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

φ Andromedae star system properties

φ 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 φ Andromedae double sysyem:

Main star magnitude 4.25

Secondary star magnitude 5.45

Magnitude difference 1.2

Separation 0.4 arcsec

Alternative designations of φ Andromedae

Bayer designation φ Andromedae
(phi Andromedae)

Flamsteed designation 42 Andromedae

Henry Draper Catalogue HD6811

SAO Catalogue SAO36972

Hipparcos Catalogue HIP5434

Durchmusterung Catalogue BD+46 275

General Catalogue of Variable Stars Var?

Aitken Double Star Catalogue ADS940

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Other stars in Andromeda