ρ Boötis (rho Boötis)

Above the horizon. Rise: 14:20 | Tran: 23:25 | Set: 8:35

Alt: 60.80° Az: 126.09° Direction: South-East

ρ Boötis is a variable and double giant star of spectral class K3 in the constellation of Boötes.

ρ Boötis visual magnitude is 3.58. Because of its moderate brightness, ρ Boötis 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.

DSS2 image of ρ Boötis. The red arrow shows the motion of ρ Boötis during the next 1000 years (-1.67 arcmin in Right Ascension and 1.98 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 14h 32m 55s

Declination +30° 15’ 36”

Hour Angle 22h 11m 21s

Sidereal Time 12h 44m 17s

J2000

Right Ascension 14h 31m 49s

Declination +30° 22’ 17”

Galactic Coordinates

Galactic Longitude 47.29°

Galactic Latitude 67.8°

Finder Chart

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Finder chart for ρ Boötis (rho Boötis).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 3.58

Class Giant

Absolute magnitude 0.28

Spectral Type K3III

Color Index (B-V) 1.3

Temperature 4121K

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

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

Star System Properties

ρ Boötis 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 ρ Boötis double sysyem:

Main star magnitude 3.58

Secondary star magnitude 11.78

Magnitude difference 8.2

Separation 42.2 arcsec

Distance, Radial Speed, Proper Motion

ρ Boötis is distant 148.72 light years from the Sun and it is moving towards the Sun at the speed of 14 kilometers per second.

Distance (parsec) 45.62

Distance (light year) 148.72

Radial Speed -14 km/s

Proper Motion RA -0.1 arcsec/y

Proper Motion Dec 0.119"/y

Alternative Designations

Bayer designation ρ Boötis
(rho Boötis)

Flamsteed designation 25 Boötis

Henry Draper Catalogue HD127665

SAO Catalogue SAO64202

Hipparcos Catalogue HIP71053

Durchmusterung Catalogue BD+31 2628

FK5 Catalogue 534

General Catalogue of Variable Stars 6697

Aitken Double Star Catalogue ADS9296

Visibility from Your Location

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

Azimuth: 59.7° RISE 14:20

Max altitude: 68.8° TRANSIT 23:25

Azimuth: 300.3° SET 8:35

Set Location

Other stars in Boötes