α Octantis (alpha Octantis)

Below the horizon. Never rises today

Alt: -42.08° Az: 193.36° Direction: South-South-West

α Octantis is a giant star of spectral class A7 in the constellation of Octans.

α Octantis visual magnitude is 5.15. Because of its faintness, α Octantis 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.

Image of α Octantis (alpha Octantis) star

DSS2 image of α Octantis. The red arrow shows the motion of α Octantis during the next 1000 years (0.10 arcmin in Right Ascension and -6.15 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 21h 07m 42s

Declination -76° 55’ 14”

Hour Angle 03h 17m 05s

Sidereal Time 00h 24m 48s

J2000

Right Ascension 21h 04m 42s

Declination -77° 01’ 26”

Galactic Coordinates

Galactic Longitude 315.96°

Galactic Latitude -33.65°

Finder Chart

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Finder chart for α Octantis (alpha Octantis).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.15

Class Giant

Absolute magnitude 1.87

Spectral Type A7III

Color Index (B-V) 0.49

Temperature 6435K

The red dot in the diagram below shows where α Octantis is situated in the Hertzsprung–Russell diagram.

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

Distance, Radial Speed, Proper Motion

α Octantis is distant 147.71 light years from the Sun and it is moving far from the Sun at the speed of 45 kilometers per second.

Distance (parsec) 45.31

Distance (light year) 147.71

Radial Speed 45 km/s

Proper Motion RA 0.006 arcsec/y

Proper Motion Dec -0.369"/y

Alternative Designations

Bayer designation α Octantis
(alpha Octantis)

Henry Draper Catalogue HD199532

SAO Catalogue SAO257879

Hipparcos Catalogue HIP104043

Durchmusterung Catalogue CP-77 1474

FK5 Catalogue 787

Visibility from Your Location

α Octantis (alpha Octantis) is currently not visible from Greenwich, UK

In Evidence

Other stars in Octans

α Octantis (alpha Octantis)

Celestial Coordinates

Apparent

J2000

Galactic Coordinates

Finder Chart

Magnitude, Color, Spectral Class

Distance, Radial Speed, Proper Motion

Alternative Designations

Visibility from Your Location

Set Location

In Evidence

Other stars in Octans

α Octantis (alpha Octantis)

Celestial Coordinates

Apparent

J2000

Galactic Coordinates

Finder Chart

Magnitude, Color, Spectral Class

Distance, Radial Speed, Proper Motion

Alternative Designations

Visibility from Your Location