HR6987

HR6987 is a multiple main-sequence star in the constellation of Ophiuchus.

HR6987 visual magnitude is 5.45. Because of its reltive faintness, HR6987 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 HR6987:

Color of HR6987 ⬤

Magnitude of HR6987 5.45

Class Main-sequence

VISIBILITY RIGHT NOW HR6987 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 34°.

Celestial coordinates and finder chart of HR6987

HR6987 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 HR6987 are provided in the following table:

Right Ascension J2000 18h 36m 39s

Declination J2000 +06° 40’ 18”

Galactic Longitude 37.22°

Galactic Latitude 6.31°

Constellation Ophiuchus

The simplified sky map below shows the position of HR6987 in the sky:

Simplified finder chart for HR6987.

Visibility of HR6987 from your location

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

Today's HR6987 rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 83.3° RISE 0:35

Max altitude: 45.2° TRANSIT 7:11

Azimuth: 276.7° SET 13:42

RIGHT NOW HR6987 is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR6987

The image below is a photograph of HR6987 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 HR6987 is -0.025 arcsec per year in Right Ascension and -0.141 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

DSS2 image of HR6987. The red arrow shows the motion of HR6987 during the next 1000 years (-0.42 arcmin in Right Ascension and -2.35 arcmin in declination);

Distance of HR6987 from the Sun and relative movement

HR6987 is distant 103.39 light years from the Sun and it is moving towards the Sun at the speed of 21 kilometers per second.

Distance (parsec) 31.72 pc

Distance (light year) 103.39 ly

Heliocentric radial velocity -21 km/s

Proper Motion RA -0.025 arcsec/year

Proper Motion Dec -0.141 arcsec/year

Spectral properties of HR6987

HR6987 belongs to spectral class F3 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude 2.94

Spectral Type F3V

Color Index (B-V) 0.37

Temperature of HR6987 7044K

The red dot in the diagram below shows where HR6987 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR6987. Attribution: Richard Powell / CC BY-SA

HR6987 star system properties

HR6987 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 HR6987 double sysyem:

Main star magnitude 5.45

Secondary star magnitude 12.15

Magnitude difference 6.7

Separation 74.8 arcsec

Alternative designations of HR6987

Henry Draper Catalogue HD171834

SAO Catalogue SAO123693

Hipparcos Catalogue HIP91237

Durchmusterung Catalogue BD+06 3855

Aitken Double Star Catalogue ADS11496

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Other stars in Ophiuchus