24 Ophiuchi

Below the horizon. Rise: 14:36 | Tran: 18:25 | Set: 22:14

Alt: -8.16° Az: 242.70° Direction: West-South-West

24 Ophiuchi is a double hypergiant star of spectral class A0 in the constellation of Ophiuchus.

24 Ophiuchi visual magnitude is 5.58. Because of its faintness, 24 Ophiuchi is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

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);

Celestial Coordinates

Apparent

Right Ascension 16h 58m 17s

Declination -23° 11’ 13”

Hour Angle 04h 52m 29s

Sideral Time 21h 50m 47s

J2000

Right Ascension 16h 56m 48s

Declination -23° 08’ 59”

Galactic Coordinates

Galactic Longitude 358.6°

Galactic Latitude 12.31°

Finder Chart

Simplified finder chart for 24 Ophiuchi.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.58

Class Hypergiant

Absolute magnitude 0.35

Spectral Type A0V

Color Index (B-V) -0.02

Temperature 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

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

Distance, Radial Speed, Proper Motion

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

Distance (light year) 362.63

Radial Speed -26 km/s

Proper Motion RA -0.004 arcsec/y

Proper Motion Dec 0.001"/y

Alternative Designations

Flamsteed designation 24 Ophiuchi

Henry Draper Catalogue HD152849

SAO Catalogue SAO184822

Hipparcos Catalogue HIP82925

Durchmusterung Catalogue BD-22 4249

Aitken Double Star Catalogue ADS10265

Visibility from Your Location

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

Azimuth: 113.2° RISE 14:36

Max altitude: 15.3° TRANSIT 18:25

Azimuth: 246.8° SET 22:14

Name:	Greenwich, UK
Latitude:	51° 28' 48.0" N
Longitude:	0° 0' 0.0" E
Timezone:	Europe/London

Location

Other stars in Ophiuchus