18 Boötis

Below the horizon. Rise: 14:14 | Tran: 21:19 | Set: 4:27

Alt: -25.25° Az: 8.76° Direction: North

18 Boötis is a double sub-giant star of spectral class F5 in the constellation of Boötes.

18 Boötis visual magnitude is 5.41. Because of its faintness, 18 Boötis is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

DSS2 image of 18 Boötis. The red arrow shows the motion of 18 Boötis during the next 1000 years (1.77 arcmin in Right Ascension and -0.50 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 14h 20m 30s

Declination +12° 53’ 16”

Hour Angle 12h 32m 29s

Sidereal Time 02h 52m 59s

J2000

Right Ascension 14h 19m 16s

Declination +13° 00’ 15”

Galactic Coordinates

Galactic Longitude 2.76°

Galactic Latitude 65.08°

Finder Chart

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Finder chart for 18 Boötis.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.41

Class Sub-giant

Absolute magnitude 3.33

Spectral Type F5IV

Color Index (B-V) 0.38

Temperature 6989K

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

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

Star System Properties

18 Boötis is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the 18 Boötis double sysyem:

Main star magnitude 5.41

Secondary star magnitude 10.31

Magnitude difference 4.9

Separation 156.4 arcsec

Distance, Radial Speed, Proper Motion

18 Boötis is distant 85.05 light years from the Sun and it is moving towards the Sun at the speed of 3 kilometers per second.

Distance (parsec) 26.09

Distance (light year) 85.05

Radial Speed -3 km/s

Proper Motion RA 0.106 arcsec/y

Proper Motion Dec -0.03"/y

Alternative Designations

Flamsteed designation 18 Boötis

Henry Draper Catalogue HD125451

SAO Catalogue SAO100975

Hipparcos Catalogue HIP69989

Durchmusterung Catalogue BD+13 2782

Gliese Catalogue NN 3841

FK5 Catalogue 1372

Visibility from Your Location

Today's 18 Boötis rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 77.1° RISE 14:14

Max altitude: 51.4° TRANSIT 21:19

Azimuth: 282.9° SET 4:27

Set Location

Other stars in Boötes