ρ Ophiuchi (rho Ophiuchi)

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

ρ Ophiuchi visual magnitude is 5.92. Because of its reltive faintness, ρ Ophiuchi 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 ρ Ophiuchi:

Color of ρ Ophiuchi ⬤

Magnitude of ρ Ophiuchi 5.92

Class Main-sequence

VISIBILITY RIGHT NOW ρ Ophiuchi (rho Ophiuchi) is above the horizon from Greenwich, United Kingdom [change]. Altitude: 15°.

Celestial coordinates and finder chart of ρ Ophiuchi

ρ 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 ρ Ophiuchi are provided in the following table:

Right Ascension J2000 16h 25m 35s

Declination J2000 -23° 26’ 45”

Galactic Longitude 353.69°

Galactic Latitude 17.69°

Constellation Ophiuchus

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

Finder chart ρ Ophiuchi (rho Ophiuchi) star

Simplified finder chart for ρ Ophiuchi (rho Ophiuchi).

Visibility of ρ Ophiuchi from your location

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

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

Azimuth: 113.4° RISE 1:13

Max altitude: 15.1° TRANSIT 5:00

Azimuth: 246.6° SET 8:47

RIGHT NOW ρ Ophiuchi (rho Ophiuchi) is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of ρ Ophiuchi

The image below is a photograph of ρ 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 ρ Ophiuchi is -0.007 arcsec per year in Right Ascension and -0.017 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of ρ Ophiuchi. The red arrow shows the motion of ρ Ophiuchi during the next 10000 years (-1.17 arcmin in Right Ascension and -2.83 arcmin in declination);

Spectral properties of ρ Ophiuchi

ρ Ophiuchi belongs to spectral class B2 and has a luminosity class of V corresponding to a main-sequence star.

Spectral Type B2V

Color Index (B-V)

Temperature of ρ Ophiuchi 10125K

ρ Ophiuchi star system properties

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

Main star magnitude 5.92

Secondary star magnitude 6.62

Magnitude difference 0.7

Separation 3.2 arcsec

Alternative designations of ρ Ophiuchi

Bayer designation ρ Ophiuchi
(rho Ophiuchi)

Flamsteed designation 5 Ophiuchi

Henry Draper Catalogue HD147934

SAO Catalogue SAO184381

Durchmusterung Catalogue CD-2312861

Aitken Double Star Catalogue ADS10049

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