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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 6:59  
clear_day Transit: 12:12  
SunsetSet: 17:25
sleep NighttimeWhat's Visible Now?
All Constellations » Ophiuchus » 

24 Ophiuchi

Altitude: 9.6°   Azimuth: 148.5°   Direction: South-South-East

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 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.

Image of 24 Ophiuchi star
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);

Key facts about 24 Ophiuchi

5.58
Hypergiant

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

Altitude: 9.6°
Azimuth: 148.5°
Direction: South-South-East

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:

16h 56m 48s
-23° 08’ 59”
358.6°
12.31°
Ophiuchus

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

Finder chart 24 Ophiuchi star
Simplified finder chart for 24 Ophiuchi.

Visibility of 24 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 24 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: 113.2°
Max altitude: 15.4°
Azimuth: 246.9°

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.

111.23 pc
362.63 ly
-26 km/s
-0.004 arcsec/year
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.

0.35
A0V
10382K

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

HR 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:

5.58
5.88
0.3
1 arcsec

Alternative designations of 24 Ophiuchi

24 Ophiuchi
SAO184822
SAO184822