Alkalurops - μ1 Boötis (mu1 Boötis)

Below the horizon. Rise: 11:35 | Tran: 22:24 | Set: 9:16

Alt: -0.42° Az: 349.11° Direction: North

Alkalurops, also designated as μ1 Boötis (mu1 Boötis), is a variable and multiple sub-giant star of spectral class F2 in the constellation of Boötes.

Alkalurops visual magnitude is 4.31. Because of its moderate brightness, Alkalurops is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

Image of Alkalurops - μ1 Boötis (mu1 Boötis) star

DSS2 image of Alkalurops. The red arrow shows the motion of Alkalurops during the next 1000 years (-2.43 arcmin in Right Ascension and 1.45 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 15h 25m 27s

Declination +37° 17’ 18”

Hour Angle 11h 05m 03s

Sidereal Time 02h 30m 30s

J2000

Right Ascension 15h 24m 29s

Declination +37° 22’ 37”

Galactic Coordinates

Galactic Longitude 60.39°

Galactic Latitude 56.31°

Finder Chart

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Finder chart for Alkalurops - μ1 Boötis (mu1 Boötis).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.31

Class Sub-giant

Absolute magnitude 1.46

Spectral Type F2IV

Color Index (B-V) 0.31

Temperature 7399K

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

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

Star System Properties

Alkalurops is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the Alkalurops double sysyem:

Main star magnitude 4.31

Secondary star magnitude 6.51

Magnitude difference 2.2

Separation 108.9 arcsec

Distance, Radial Speed, Proper Motion

Alkalurops is distant 120.92 light years from the Sun and it is moving towards the Sun at the speed of 13 kilometers per second.

Distance (parsec) 37.09

Distance (light year) 120.92

Radial Speed -13 km/s

Proper Motion RA -0.146 arcsec/y

Proper Motion Dec 0.087"/y

Alternative Designations

Proper Name Alkalurops

Bayer designation μ1 Boötis
(mu1 Boötis)

Flamsteed designation 51 Boötis

Henry Draper Catalogue HD137391

SAO Catalogue SAO64686

Hipparcos Catalogue HIP75411

Durchmusterung Catalogue BD+37 2636

Gliese Catalogue NN 3903 A

FK5 Catalogue 568

General Catalogue of Variable Stars 7063

Aitken Double Star Catalogue ADS9626

Visibility from Your Location

Today's Alkalurops - μ1 Boötis (mu1 Boötis) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 52.7° RISE 11:35

Max altitude: 75.8° TRANSIT 22:24

Azimuth: 307.3° SET 9:16

Set Location

Other stars in Boötes