θ1 Sagittarii (theta1 Sagittarii)

Above the horizon. Rise: 17:56 | Tran: 19:45 | Set: 21:35

Alt: 2.87° Az: 188.19° Direction: South

θ1 Sagittarii is a sub-giant star of spectral class B3 in the constellation of Sagittarius.

θ1 Sagittarii visual magnitude is 4.37. Because of its moderate brightness, θ1 Sagittarii is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

Image of θ1 Sagittarii (theta1 Sagittarii) star

DSS2 image of θ1 Sagittarii. The red arrow shows the motion of θ1 Sagittarii during the next 10000 years (1.00 arcmin in Right Ascension and -4.33 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 20h 01m 20s

Declination -35° 12’ 25”

Hour Angle 00h 40m 06s

Sideral Time 20h 41m 26s

J2000

Right Ascension 19h 59m 44s

Declination -35° 16’ 35”

Galactic Coordinates

Galactic Longitude 5.52°

Galactic Latitude -28.47°

Finder Chart

Simplified finder chart for θ1 Sagittarii (theta1 Sagittarii).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.37

Class Sub-giant

Absolute magnitude -2.02

Spectral Type B3IV

Color Index (B-V) -0.15

Temperature 12489K

The red dot in the diagram below shows where θ1 Sagittarii is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of θ1 Sagittarii. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

θ1 Sagittarii is distant 617.42 light years from the Sun and it is moving far from the Sun at the speed of 1 kilometers per second.

Distance (parsec) 189.39

Distance (light year) 617.42

Radial Speed 1 km/s

Proper Motion RA 0.006 arcsec/y

Proper Motion Dec -0.026"/y

Alternative Designations

Bayer designation θ1 Sagittarii
(theta1 Sagittarii)

Henry Draper Catalogue HD189103

SAO Catalogue SAO211716

Hipparcos Catalogue HIP98412

Durchmusterung Catalogue CD-3513831

FK5 Catalogue 751

Visibility from Your Location

Today's θ1 Sagittarii (theta1 Sagittarii) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 125.2° RISE 17:56

Max altitude: 3.3° TRANSIT 19:45

Azimuth: 234.8° SET 21:35

Set Location

Other stars in Sagittarius