30 Sagittarii

Above the horizon. Rise: 0:16 | Tran: 4:15 | Set: 8:11

Alt: 0.84° Az: 231.44° Direction: South-West

30 Sagittarii is a double giant star of spectral class A7 in the constellation of Sagittarius.

30 Sagittarii visual magnitude is 6.61. Because of its faintness, 30 Sagittarii is not visible to the naked eye.

DSS2 image of 30 Sagittarii. The red arrow shows the motion of 30 Sagittarii during the next 10000 years (-3.17 arcmin in Right Ascension and -5.50 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 18h 52m 21s

Declination -22° 07’ 50”

Hour Angle 03h 50m 15s

Sidereal Time 22h 42m 37s

J2000

Right Ascension 18h 50m 50s

Declination -22° 09’ 43”

Galactic Coordinates

Galactic Longitude 12.95°

Galactic Latitude -9.78°

Finder Chart

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Finder chart for 30 Sagittarii.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.61

Class Giant

Absolute magnitude 2.23

Spectral Type A7III

Color Index (B-V) 0.38

Temperature 6989K

The red dot in the diagram below shows where 30 Sagittarii is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 30 Sagittarii. Attribution: Richard Powell / CC BY-SA

Star System Properties

30 Sagittarii is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the 30 Sagittarii double sysyem:

Main star magnitude 6.61

Secondary star magnitude 13.41

Magnitude difference 6.8

Separation 21.1 arcsec

Distance, Radial Speed, Proper Motion

30 Sagittarii is distant 244.93 light years from the Sun and it is moving towards the Sun at the speed of 35 kilometers per second.

Distance (parsec) 75.13

Distance (light year) 244.93

Radial Speed -35 km/s

Proper Motion RA -0.019 arcsec/y

Proper Motion Dec -0.033"/y

Alternative Designations

Flamsteed designation 30 Sagittarii

Henry Draper Catalogue HD174309

SAO Catalogue SAO187342

Hipparcos Catalogue HIP92480

Durchmusterung Catalogue BD-22 4881

FK5 Catalogue 1493

Aitken Double Star Catalogue ADS11731

Visibility from Your Location

Today's 30 Sagittarii rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 112.1° RISE 0:16

Max altitude: 16.4° TRANSIT 4:15

Azimuth: 247.9° SET 8:11

Set Location

Other stars in Sagittarius