74 Ophiuchi

Altitude: -34.9° Azimuth: 352.8° Direction: North

74 Ophiuchi is a multiple giant star in the constellation of Ophiuchus.

74 Ophiuchi visual magnitude is 4.86. Because of its moderate brightness, 74 Ophiuchi 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 74 Ophiuchi:

Color of 74 Ophiuchi ⬤

Magnitude of 74 Ophiuchi 4.86

Class Giant

VISIBILITY RIGHT NOW

74 Ophiuchi is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -34.9°
Azimuth: 352.8°
Direction: North

Celestial coordinates and finder chart of 74 Ophiuchi

74 Ophiuchi 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 74 Ophiuchi are provided in the following table:

Right Ascension J2000 18h 20m 52s

Declination J2000 +03° 22’ 37”

Galactic Longitude 32.46°

Galactic Latitude 8.34°

Constellation Ophiuchus

The simplified sky map below shows the position of 74 Ophiuchi in the sky:

Simplified finder chart for 74 Ophiuchi.

Visibility of 74 Ophiuchi 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 74 Ophiuchi 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: 86.6° RISE 7:13

Max altitude: 41.9° TRANSIT 13:28

Azimuth: 273.4° SET 19:43

Digitized Sky Survey image of 74 Ophiuchi

The image below is a photograph of 74 Ophiuchi 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 74 Ophiuchi is 0 arcsec per year in Right Ascension and 0.01 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of 74 Ophiuchi. The red arrow shows the motion of 74 Ophiuchi during the next 10000 years (0.00 arcmin in Right Ascension and 1.67 arcmin in declination);

Distance of 74 Ophiuchi from the Sun and relative movement

74 Ophiuchi is distant 269.20 light years from the Sun and it is moving far from the Sun at the speed of 5 kilometers per second.

Distance (parsec) 82.58 pc

Distance (light year) 269.20 ly

Heliocentric radial velocity 5 km/s

Proper Motion Dec 0.01 arcsec/year

Spectral properties of 74 Ophiuchi

74 Ophiuchi belongs to spectral class G8 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude 0.28

Spectral Type G8III

Color Index (B-V) 0.91

Temperature of 74 Ophiuchi 4970K

The red dot in the diagram below shows where 74 Ophiuchi is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 74 Ophiuchi. Attribution: Richard Powell / CC BY-SA

74 Ophiuchi star system properties

74 Ophiuchi 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 74 Ophiuchi double sysyem:

Main star magnitude 4.86

Secondary star magnitude 12.16

Magnitude difference 7.3

Separation 28.1 arcsec

Alternative designations of 74 Ophiuchi

Flamsteed designation 74 Ophiuchi

Henry Draper Catalogue HD168656

SAO Catalogue SAO123377

Hipparcos Catalogue HIP89918

Durchmusterung Catalogue BD+03 3680

FK5 Catalogue 1476

Aitken Double Star Catalogue ADS11271

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In Evidence

Other stars in Ophiuchus