78 Ursae Majoris

78 Ursae Majoris is a variable and double main-sequence star in the constellation of Ursa Major.

78 Ursae Majoris visual magnitude is 4.93. Because of its moderate brightness, 78 Ursae Majoris 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 table below summarizes the key facts about 78 Ursae Majoris:

Color of 78 Ursae Majoris ⬤

Magnitude of 78 Ursae Majoris 4.93

Class Main-sequence

VISIBILITY RIGHT NOW 78 Ursae Majoris is above the horizon from Greenwich, United Kingdom [change]. Altitude: 70°.

Celestial coordinates and finder chart of 78 Ursae Majoris

78 Ursae Majoris is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 78 Ursae Majoris are provided in the following table:

Right Ascension J2000 13h 00m 43s

Declination J2000 +56° 21’ 59”

Galactic Longitude 120.3°

Galactic Latitude 60.71°

Constellation Ursa Major

The simplified sky map below shows the position of 78 Ursae Majoris in the sky:

Simplified finder chart for 78 Ursae Majoris.

Visibility of 78 Ursae Majoris from your location

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

78 Ursae Majoris is circumpolar and transits at 01:03 UTC (altitude: 85.1°)

Digitized Sky Survey image of 78 Ursae Majoris

The image below is a photograph of 78 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 78 Ursae Majoris is 0.114 arcsec per year in Right Ascension and -0.009 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

DSS2 image of 78 Ursae Majoris. The red arrow shows the motion of 78 Ursae Majoris during the next 1000 years (1.90 arcmin in Right Ascension and -0.15 arcmin in declination);

Distance of 78 Ursae Majoris from the Sun and relative movement

78 Ursae Majoris is distant 81.38 light years from the Sun and it is moving towards the Sun at the speed of 10 kilometers per second.

Distance (parsec) 24.96 pc

Distance (light year) 81.38 ly

Heliocentric radial velocity -10 km/s

Proper Motion RA 0.114 arcsec/year

Proper Motion Dec -0.009 arcsec/year

Spectral properties of 78 Ursae Majoris

78 Ursae Majoris belongs to spectral class F2 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude 2.94

Spectral Type F2V

Color Index (B-V) 0.36

Temperature of 78 Ursae Majoris 7101K

The red dot in the diagram below shows where 78 Ursae Majoris is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 78 Ursae Majoris. Attribution: Richard Powell / CC BY-SA

78 Ursae Majoris star system properties

78 Ursae Majoris is a visual double star which can be observed with the help of large telescopes. The table below shows key information about the 78 Ursae Majoris double sysyem:

Main star magnitude 4.93

Secondary star magnitude 7.43

Magnitude difference 2.5

Separation 1.3 arcsec

Alternative designations of 78 Ursae Majoris

Flamsteed designation 78 Ursae Majoris

Henry Draper Catalogue HD113139

SAO Catalogue SAO28601

Hipparcos Catalogue HIP63503

Durchmusterung Catalogue BD+57 1408

General Catalogue of Variable Stars 6058

Aitken Double Star Catalogue ADS8739

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Other stars in Ursa Major