24 Ophiuchi

24 Ophiuchi is a double hypergiant star in the constellation of Ophiuchus.

24 Ophiuchi visual magnitude is 5.58. Because of its reltive faintness, 24 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 24 Ophiuchi:

Color of 24 Ophiuchi ⬤

Magnitude of 24 Ophiuchi 5.58

Class Hypergiant

VISIBILITY RIGHT NOW 24 Ophiuchi is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of 24 Ophiuchi

24 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 24 Ophiuchi are provided in the following table:

Right Ascension J2000 16h 56m 48s

Declination J2000 -23° 08’ 59”

Galactic Longitude 358.6°

Galactic Latitude 12.31°

Constellation Ophiuchus

The simplified sky map below shows the position of 24 Ophiuchi in the sky:

Simplified finder chart for 24 Ophiuchi.

Visibility of 24 Ophiuchi from your location

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

Today's 24 Ophiuchi rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 113.2° RISE 1:26

Max altitude: 15.4° TRANSIT 5:15

Azimuth: 246.9° SET 9:04

RIGHT NOW 24 Ophiuchi is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 24 Ophiuchi

The image below is a photograph of 24 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 24 Ophiuchi is -0.004 arcsec per year in Right Ascension and 0.001 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

DSS2 image of 24 Ophiuchi. The red arrow shows the motion of 24 Ophiuchi during the next 100000 years (-6.67 arcmin in Right Ascension and 1.67 arcmin in declination);

Distance of 24 Ophiuchi from the Sun and relative movement

24 Ophiuchi is distant 362.63 light years from the Sun and it is moving towards the Sun at the speed of 26 kilometers per second.

Distance (parsec) 111.23 pc

Distance (light year) 362.63 ly

Heliocentric radial velocity -26 km/s

Proper Motion RA -0.004 arcsec/year

Proper Motion Dec 0.001 arcsec/year

Spectral properties of 24 Ophiuchi

24 Ophiuchi belongs to spectral class A0 and has a luminosity class of V corresponding to a hypergiant star.

Absolute magnitude 0.35

Spectral Type A0V

Color Index (B-V) -0.02

Temperature of 24 Ophiuchi 10382K

The red dot in the diagram below shows where 24 Ophiuchi is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 24 Ophiuchi. Attribution: Richard Powell / CC BY-SA

24 Ophiuchi star system properties

24 Ophiuchi is a visual double star which can be observed with the help of large telescopes. The table below shows key information about the 24 Ophiuchi double sysyem:

Main star magnitude 5.58

Secondary star magnitude 5.88

Magnitude difference 0.3

Separation 1 arcsec

Alternative designations of 24 Ophiuchi

Flamsteed designation 24 Ophiuchi

Henry Draper Catalogue HD152849

SAO Catalogue SAO184822

Hipparcos Catalogue HIP82925

Durchmusterung Catalogue BD-22 4249

Aitken Double Star Catalogue ADS10265

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Other stars in Ophiuchus