45 Ophiuchi

Altitude: 6.7° Azimuth: 162.3° Direction: South-South-East

45 Ophiuchi is a sub-giant star in the constellation of Ophiuchus.

45 Ophiuchi visual magnitude is 4.29. Because of its moderate brightness, 45 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 45 Ophiuchi:

Color of 45 Ophiuchi ⬤

Magnitude of 45 Ophiuchi 4.29

Class Sub-giant

VISIBILITY RIGHT NOW

45 Ophiuchi is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 6.7°
Azimuth: 162.3°
Direction: South-South-East

Celestial coordinates and finder chart of 45 Ophiuchi

45 Ophiuchi is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 45 Ophiuchi are provided in the following table:

Right Ascension J2000 17h 27m 21s

Declination J2000 -29° 52’ 00”

Galactic Longitude 357.08°

Galactic Latitude 2.85°

Constellation Ophiuchus

The simplified sky map below shows the position of 45 Ophiuchi in the sky:

Simplified finder chart for 45 Ophiuchi.

Visibility of 45 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 45 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: 119.9° RISE 15:31

Max altitude: 8.7° TRANSIT 18:26

Azimuth: 240.1° SET 21:20

Digitized Sky Survey image of 45 Ophiuchi

The image below is a photograph of 45 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 45 Ophiuchi is 0.02 arcsec per year in Right Ascension and -0.139 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

DSS2 image of 45 Ophiuchi. The red arrow shows the motion of 45 Ophiuchi during the next 1000 years (0.33 arcmin in Right Ascension and -2.32 arcmin in declination);

Distance of 45 Ophiuchi from the Sun and relative movement

45 Ophiuchi is distant 111.41 light years from the Sun and it is moving far from the Sun at the speed of 37 kilometers per second.

Distance (parsec) 34.18 pc

Distance (light year) 111.41 ly

Heliocentric radial velocity 37 km/s

Proper Motion RA 0.02 arcsec/year

Proper Motion Dec -0.139 arcsec/year

Spectral properties of 45 Ophiuchi

45 Ophiuchi belongs to spectral class F5 and has a luminosity class of IV corresponding to a sub-giant star.

Absolute magnitude 1.62

Spectral Type F5IV

Color Index (B-V) 0.4

Temperature of 45 Ophiuchi 6880K

The red dot in the diagram below shows where 45 Ophiuchi is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 45 Ophiuchi. Attribution: Richard Powell / CC BY-SA

Alternative designations of 45 Ophiuchi

Flamsteed designation 45 Ophiuchi

Henry Draper Catalogue HD157919

SAO Catalogue SAO185412

Hipparcos Catalogue HIP85423

Durchmusterung Catalogue CD-2913557

FK5 Catalogue 646

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In Evidence

Other stars in Ophiuchus