σ1 Ursae Majoris (sigma1 Ursae Majoris)

σ1 Ursae Majoris is a giant star in the constellation of Ursa Major.

σ1 Ursae Majoris visual magnitude is 5.14. Because of its reltive faintness, σ1 Ursae Majoris should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about σ1 Ursae Majoris:

Color of σ1 Ursae Majoris ⬤

Magnitude of σ1 Ursae Majoris 5.14

Class Giant

VISIBILITY RIGHT NOW σ1 Ursae Majoris (sigma1 Ursae Majoris) is above the horizon from Greenwich, United Kingdom [change]. Altitude: 32°.

Celestial coordinates and finder chart of σ1 Ursae Majoris

σ1 Ursae Majoris is situated close to the northern celestial pole and, as such, it is visible for most part of the year from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of σ1 Ursae Majoris are provided in the following table:

Right Ascension J2000 09h 08m 23s

Declination J2000 +66° 52’ 23”

Galactic Longitude 147.27°

Galactic Latitude 38.03°

Constellation Ursa Major

The simplified sky map below shows the position of σ1 Ursae Majoris in the sky:

Finder chart σ1 Ursae Majoris (sigma1 Ursae Majoris) star

Simplified finder chart for σ1 Ursae Majoris (sigma1 Ursae Majoris).

Visibility of σ1 Ursae Majoris from your location

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

σ1 Ursae Majoris (sigma1 Ursae Majoris) is circumpolar and transits at 21:00 UTC (altitude: 74.6°)

Digitized Sky Survey image of σ1 Ursae Majoris

The image below is a photograph of σ1 Ursae Majoris from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of σ1 Ursae Majoris is -0.018 arcsec per year in Right Ascension and -0.038 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of σ1 Ursae Majoris (sigma1 Ursae Majoris) star

DSS2 image of σ1 Ursae Majoris. The red arrow shows the motion of σ1 Ursae Majoris during the next 10000 years (-3.00 arcmin in Right Ascension and -6.33 arcmin in declination);

Distance of σ1 Ursae Majoris from the Sun and relative movement

σ1 Ursae Majoris is distant 498.47 light years from the Sun and it is moving far from the Sun at the speed of 15 kilometers per second.

Distance (parsec) 152.91 pc

Distance (light year) 498.47 ly

Heliocentric radial velocity 15 km/s

Proper Motion RA -0.018 arcsec/year

Proper Motion Dec -0.038 arcsec/year

Spectral properties of σ1 Ursae Majoris

σ1 Ursae Majoris belongs to spectral class K5 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -0.78

Spectral Type K5III

Color Index (B-V) 1.51

Temperature of σ1 Ursae Majoris 3779K

The red dot in the diagram below shows where σ1 Ursae Majoris is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of σ1 Ursae Majoris. Attribution: Richard Powell / CC BY-SA

Alternative designations of σ1 Ursae Majoris

Bayer designation σ1 Ursae Majoris
(sigma1 Ursae Majoris)

Flamsteed designation 11 Ursae Majoris

Henry Draper Catalogue HD77800

SAO Catalogue SAO14769

Hipparcos Catalogue HIP44857

Durchmusterung Catalogue BD+67 573

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In Evidence

Other stars in Ursa Major