π1 Boötis (pi1 Boötis)

Below the horizon. Rise: 16:34 | Tran: 23:58 | Set: 7:26

Alt: -3.71° Az: 302.23° Direction: West-North-West

π1 Boötis is a variable and multiple star of spectral class B9 in the constellation of Boötes.

π1 Boötis visual magnitude is 4.94. Because of its moderate brightness, π1 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 π1 Boötis. The red arrow shows the motion of π1 Boötis during the next 10000 years (2.50 arcmin in Right Ascension and 2.50 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 14h 41m 55s

Declination +16° 18’ 38”

Hour Angle 07h 53m 38s

Sidereal Time 22h 35m 33s

J2000

Right Ascension 14h 40m 43s

Declination +16° 25’ 05”

Galactic Coordinates

Galactic Longitude 15.64°

Galactic Latitude 62.54°

Finder Chart

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Finder chart for π1 Boötis (pi1 Boötis).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.94

Class

π1 Boötis is also a MnHgSi chemically peculiar star.

Absolute magnitude 0.00

Spectral Type B9

Color Index (B-V) -0.03

Temperature 10516K

The red dot in the diagram below shows where π1 Boötis is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of π1 Boötis. Attribution: Richard Powell / CC BY-SA

Star System Properties

π1 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 π1 Boötis double sysyem:

Main star magnitude 4.94

Secondary star magnitude 5.84

Magnitude difference 0.9

Separation 5.7 arcsec

Distance, Radial Speed, Proper Motion

π1 Boötis is distant 317.12 light years from the Sun and it is moving towards the Sun at the speed of 1 kilometers per second.

Distance (parsec) 97.28

Distance (light year) 317.12

Radial Speed -1 km/s

Proper Motion RA 0.015 arcsec/y

Proper Motion Dec 0.015"/y

Alternative Designations

Bayer designation π1 Boötis
(pi1 Boötis)

Flamsteed designation 29 Boötis

Henry Draper Catalogue HD129174

SAO Catalogue SAO101138

Hipparcos Catalogue HIP71762

Durchmusterung Catalogue BD+17 2768

General Catalogue of Variable Stars 6762

Aitken Double Star Catalogue ADS9338

Visibility from Your Location

Today's π1 Boötis (pi1 Boötis) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 73.7° RISE 16:34

Max altitude: 54.8° TRANSIT 23:58

Azimuth: 286.3° SET 7:26

Set Location

Other stars in Boötes