σ Aquarii (sigma Aquarii)

Below the horizon. Rise: 17:15 | Tran: 22:19 | Set: 3:28

Alt: -11.97° Az: 91.96° Direction: East

σ Aquarii is a hypergiant star of spectral class A0 in the constellation of Aquarius.

σ Aquarii visual magnitude is 4.82. Because of its moderate brightness, σ Aquarii 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.

DSS2 image of σ Aquarii. The red arrow shows the motion of σ Aquarii during the next 10000 years (0.50 arcmin in Right Ascension and -5.00 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 22h 31m 57s

Declination -10° 33’ 01”

Hour Angle 17h 35m 57s

Sideral Time 16h 07m 54s

J2000

Right Ascension 22h 30m 38s

Declination -10° 40’ 41”

Galactic Coordinates

Galactic Longitude 52.49°

Galactic Latitude -53.05°

Finder Chart

Simplified finder chart for σ Aquarii (sigma Aquarii).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.82

Class Hypergiant

Absolute magnitude 0.27

Spectral Type A0IV

Color Index (B-V) -0.06

Temperature 10941K

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

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

Distance, Radial Speed, Proper Motion

σ Aquarii is distant 265.26 light years from the Sun and it is moving far from the Sun at the speed of 11 kilometers per second.

Distance (parsec) 81.37

Distance (light year) 265.26

Radial Speed 11 km/s

Proper Motion RA 0.003 arcsec/y

Proper Motion Dec -0.03"/y

Alternative Designations

Bayer designation σ Aquarii
(sigma Aquarii)

Flamsteed designation 57 Aquarii

Henry Draper Catalogue HD213320

SAO Catalogue SAO165134

Hipparcos Catalogue HIP111123

Durchmusterung Catalogue BD-11 5850

FK5 Catalogue 1591

Visibility from Your Location

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

Azimuth: 100.6° RISE 17:15

Max altitude: 28.0° TRANSIT 22:19

Azimuth: 259.4° SET 3:28

Set Location

Other stars in Aquarius