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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: 7:37  
clear_day Transit: 11:46  
SunsetSet: 15:55 south
sunny DaytimeWhat's Visible Now?
All Constellations » Aries » 

Lilii Borea - 39 Arietis

Altitude: -2.4°   Azimuth: 33.0°   Direction: North-North-East

Lilii Borea, also designated as 39 Arietis , is a giant star in the constellation of Aries.

Lilii Borea visual magnitude is 4.51. Because of its moderate brightness, Lilii Borea 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 Lilii Borea:


Lilii Borea - 39 Arietis is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -2.4°
Azimuth: 33.0°
Direction: North-North-East

Celestial coordinates and finder chart of Lilii Borea

Lilii Borea 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 Lilii Borea are provided in the following table:

02h 47m 54s
+29° 14’ 49”

The simplified sky map below shows the position of Lilii Borea in the sky:

Finder chart Lilii Borea - 39 Arietis star
Simplified finder chart for Lilii Borea - 39 Arietis.

Visibility of Lilii Borea from your location

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

Today's Lilii Borea - 39 Arietis rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 60.8°
Max altitude: 67.8°
Azimuth: 299.2°

Digitized Sky Survey image of Lilii Borea

The image below is a photograph of Lilii Borea 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 Lilii Borea is 0.149 arcsec per year in Right Ascension and -0.123 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of Lilii Borea - 39 Arietis star
DSS2 image of Lilii Borea. The red arrow shows the motion of Lilii Borea during the next 1000 years (2.48 arcmin in Right Ascension and -2.05 arcmin in declination);

Distance of Lilii Borea from the Sun and relative movement

Lilii Borea is distant 180.51 light years from the Sun and it is moving towards the Sun at the speed of 15 kilometers per second.

55.37 pc
180.51 ly
-15 km/s
0.149 arcsec/year
-0.123 arcsec/year

Spectral properties of Lilii Borea

Lilii Borea belongs to spectral class K1 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where Lilii Borea is situated in the Hertzsprung–Russell diagram.

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

Alternative designations of Lilii Borea

Lilii Borea