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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
SunriseRise: 7:03  
clear_day Transit: 12:12  
SunsetSet: 17:22
sleep NighttimeWhat's Visible Now?
All Constellations » Boötes » 

ο Boötis (omicron Boötis)

Altitude: 2.3°   Azimuth: 65.3°   Direction: East-North-East

ο Boötis is a giant star in the constellation of Boötes.

ο Boötis visual magnitude is 4.6. Because of its moderate brightness, ο Boötis 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 proper motion of ο Boötis is -0.058 arcsec per year in Right Ascension and -0.049 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of ο Boötis (omicron Boötis) star
DSS2 image of ο Boötis. The red arrow shows the motion of ο Boötis during the next 10000 years (-9.67 arcmin in Right Ascension and -8.17 arcmin in declination);

Key facts about ο Boötis

4.6
Giant

ο Boötis (omicron Boötis) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 2.3°
Azimuth: 65.3°
Direction: East-North-East

Celestial coordinates and finder chart of ο Boötis

ο Boötis is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of ο Boötis are provided in the following table:

14h 45m 14s
+16° 57’ 51”
17.74°
61.82°
Boötes

The simplified sky map below shows the position of ο Boötis in the sky:

Finder chart ο Boötis (omicron Boötis) star
Simplified finder chart for ο Boötis (omicron Boötis).

Visibility of ο Boötis 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 ο Boötis (omicron Boötis) 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: 73.0°
Max altitude: 55.5°
Azimuth: 287.0°

Distance of ο Boötis from the Sun and relative movement

ο Boötis is distant 225.14 light years from the Sun and it is moving towards the Sun at the speed of 9 kilometers per second.

69.06 pc
225.14 ly
-9 km/s
-0.058 arcsec/year
-0.049 arcsec/year

Spectral properties of ο Boötis

ο Boötis belongs to spectral class G8 and has a luminosity class of III corresponding to a giant star.

0.40
G8III
4791K

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

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

Alternative designations of ο Boötis

ο Boötis
(omicron Boötis)
SAO101184
SAO101184