68 Ophiuchi

68 Ophiuchi is a variable and double main-sequence star in the constellation of Ophiuchus.

68 Ophiuchi visual magnitude is 4.45. Because of its moderate brightness, 68 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 68 Ophiuchi:

Color of 68 Ophiuchi ⬤

Magnitude of 68 Ophiuchi 4.45

Class Main-sequence

VISIBILITY RIGHT NOW 68 Ophiuchi is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of 68 Ophiuchi

68 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 68 Ophiuchi are provided in the following table:

Right Ascension J2000 18h 01m 45s

Declination J2000 +01° 18’ 19”

Galactic Longitude 28.38°

Galactic Latitude 11.64°

Constellation Ophiuchus

The simplified sky map below shows the position of 68 Ophiuchi in the sky:

Simplified finder chart for 68 Ophiuchi.

Visibility of 68 Ophiuchi from your location

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

Today's 68 Ophiuchi rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 88.7° RISE 0:15

Max altitude: 39.8° TRANSIT 6:24

Azimuth: 271.3° SET 12:29

RIGHT NOW 68 Ophiuchi is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 68 Ophiuchi

The image below is a photograph of 68 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 68 Ophiuchi is 0.015 arcsec per year in Right Ascension and -0.012 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of 68 Ophiuchi. The red arrow shows the motion of 68 Ophiuchi during the next 10000 years (2.50 arcmin in Right Ascension and -2.00 arcmin in declination);

Distance of 68 Ophiuchi from the Sun and relative movement

68 Ophiuchi is distant 264.83 light years from the Sun and it is moving far from the Sun at the speed of 6 kilometers per second.

Distance (parsec) 81.23 pc

Distance (light year) 264.83 ly

Heliocentric radial velocity 6 km/s

Proper Motion RA 0.015 arcsec/year

Proper Motion Dec -0.012 arcsec/year

Spectral properties of 68 Ophiuchi

68 Ophiuchi belongs to spectral class A2 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude -0.10

Spectral Type A2V

Color Index (B-V) 0.02

Temperature of 68 Ophiuchi 9882K

The red dot in the diagram below shows where 68 Ophiuchi is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 68 Ophiuchi. Attribution: Richard Powell / CC BY-SA

68 Ophiuchi star system properties

68 Ophiuchi is a visual double star which can be observed with the help of large telescopes. The table below shows key information about the 68 Ophiuchi double sysyem:

Main star magnitude 4.45

Secondary star magnitude 6.95

Magnitude difference 2.5

Separation 0.6 arcsec

Alternative designations of 68 Ophiuchi

Flamsteed designation 68 Ophiuchi

Henry Draper Catalogue HD164577

SAO Catalogue SAO123035

Hipparcos Catalogue HIP88290

Durchmusterung Catalogue BD+01 3560

General Catalogue of Variable Stars 10009

Aitken Double Star Catalogue ADS10990

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Other stars in Ophiuchus