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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:49  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
sunny DaytimeWhat's Visible Now?
All Constellations » Andromeda » 

18 Andromedae

Altitude: 21.1°   Azimuth: 32.6°   Direction: North-North-East

18 Andromedae is a main-sequence star in the constellation of Andromeda.

18 Andromedae visual magnitude is 5.3. Because of its reltive faintness, 18 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 18 Andromedae:

5.3
Main-sequence

18 Andromedae is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 21.1°
Azimuth: 32.6°
Direction: North-North-East

Celestial coordinates and finder chart of 18 Andromedae

18 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 18 Andromedae are provided in the following table:

23h 39m 08s
+50° 28’ 18”
111.34°
-10.77°
Andromeda

The simplified sky map below shows the position of 18 Andromedae in the sky:

Finder chart 18 Andromedae star
Simplified finder chart for 18 Andromedae.

Visibility of 18 Andromedae from your location

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

18 Andromedae is circumpolar and transits at 18:34 UTC (altitude: 89.0°)

Digitized Sky Survey image of 18 Andromedae

The image below is a photograph of 18 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 18 Andromedae is -0.017 arcsec per year in Right Ascension and -0.002 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 18 Andromedae star
DSS2 image of 18 Andromedae. The red arrow shows the motion of 18 Andromedae during the next 10000 years (-2.83 arcmin in Right Ascension and -0.33 arcmin in declination);

Distance of 18 Andromedae from the Sun and relative movement

18 Andromedae is distant 389.95 light years from the Sun and it is moving far from the Sun at the speed of 9 kilometers per second.

119.62 pc
389.95 ly
9 km/s
-0.017 arcsec/year
-0.002 arcsec/year

Spectral properties of 18 Andromedae

18 Andromedae belongs to spectral class B9 and has a luminosity class of V corresponding to a main-sequence star.

-0.09
B9V
10941K

The red dot in the diagram below shows where 18 Andromedae is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 18 Andromedae. Attribution: Richard Powell / CC BY-SA

Alternative designations of 18 Andromedae

18 Andromedae
SAO35642
SAO35642