1 Aquarii

Above the horizon. Rise: 23:35 | Tran: 5:40 | Set: 11:41

Alt: 19.50° Az: 115.33° Direction: East-South-East

1 Aquarii is a multiple giant star of spectral class K1 in the constellation of Aquarius.

1 Aquarii visual magnitude is 5.16. Because of its faintness, 1 Aquarii 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 1 Aquarii. The red arrow shows the motion of 1 Aquarii during the next 1000 years (1.68 arcmin in Right Ascension and -0.25 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 20h 40m 42s

Declination +00° 34’ 38”

Hour Angle 20h 06m 15s

Sidereal Time 16h 46m 58s

J2000

Right Ascension 20h 39m 24s

Declination +00° 29’ 11”

Galactic Coordinates

Galactic Longitude 46.47°

Galactic Latitude -23.58°

Finder Chart

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Finder chart for 1 Aquarii.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.16

Class Giant

Absolute magnitude 0.78

Spectral Type K1III

Color Index (B-V) 1.06

Temperature 4603K

The red dot in the diagram below shows where 1 Aquarii is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 1 Aquarii. Attribution: Richard Powell / CC BY-SA

Star System Properties

1 Aquarii 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 1 Aquarii double sysyem:

Main star magnitude 5.16

Secondary star magnitude 12.26

Magnitude difference 7.1

Separation 59.7 arcsec

Distance, Radial Speed, Proper Motion

1 Aquarii is distant 244.56 light years from the Sun and it is moving towards the Sun at the speed of 43 kilometers per second.

Distance (parsec) 75.02

Distance (light year) 244.56

Radial Speed -43 km/s

Proper Motion RA 0.101 arcsec/y

Proper Motion Dec -0.015"/y

Alternative Designations

Flamsteed designation 1 Aquarii

Henry Draper Catalogue HD196758

SAO Catalogue SAO126062

Hipparcos Catalogue HIP101936

Durchmusterung Catalogue BD-00 4064

FK5 Catalogue 3651

Aitken Double Star Catalogue ADS14108

Visibility from Your Location

Today's 1 Aquarii rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 89.4° RISE 23:35

Max altitude: 39.1° TRANSIT 5:40

Azimuth: 270.6° SET 11:41

Set Location

Other stars in Aquarius