ο1 Centauri (omicron1 Centauri)

Below the horizon. Rise: 14:06 | Tran: 17:02 | Set: 19:58

Alt: -9.77° Az: 151.27° Direction: South-South-East

ο1 Centauri is a variable and double supergiant star of spectral class G3 in the constellation of Centaurus.

ο1 Centauri visual magnitude is 5.13. Because of its faintness, ο1 Centauri 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 ο1 Centauri (omicron1 Centauri) star

DSS2 image of ο1 Centauri. The red arrow shows the motion of ο1 Centauri during the next 100000 years (-8.33 arcmin in Right Ascension and -8.33 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 11h 32m 57s

Declination -59° 34’ 59”

Hour Angle 19h 22m 39s

Sidereal Time 06h 55m 36s

J2000

Right Ascension 11h 31m 46s

Declination -59° 26’ 31”

Galactic Coordinates

Galactic Longitude 292.95°

Galactic Latitude 1.88°

Finder Chart

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Finder chart for ο1 Centauri (omicron1 Centauri).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.13

Class Supergiant

Absolute magnitude -4.85

Spectral Type G3I

Color Index (B-V) 1.08

Temperature 4559K

The red dot in the diagram below shows where ο1 Centauri is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of ο1 Centauri. Attribution: Richard Powell / CC BY-SA

Star System Properties

ο1 Centauri 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 ο1 Centauri double sysyem:

Main star magnitude 5.13

Secondary star magnitude 11.53

Magnitude difference 6.4

Separation 13.3 arcsec

Distance, Radial Speed, Proper Motion

ο1 Centauri is distant 3,227.72 light years from the Sun and it is moving towards the Sun at the speed of 20 kilometers per second.

Distance (parsec) 990.10

Distance (light year) 3,227.72

Radial Speed -20 km/s

Proper Motion RA -0.005 arcsec/y

Proper Motion Dec -0.005"/y

Alternative Designations

Bayer designation ο1 Centauri
(omicron1 Centauri)

Henry Draper Catalogue HD100261

SAO Catalogue SAO239145

Hipparcos Catalogue HIP56243

Durchmusterung Catalogue CP-58 3692

General Catalogue of Variable Stars Omi1 Cen

Visibility from Your Location

Today's ο1 Centauri (omicron1 Centauri) rise, transit and set times from Hudong, China are the following (all times relative to the local timezone Asia/Shanghai):

Azimuth: 149.6° RISE 14:06

Max altitude: 7.6° TRANSIT 17:02

Azimuth: 210.4° SET 19:58

Name:	Hudong, China
Latitude:	22° 49' 2.6" N
Longitude:	115° 57' 21.6" E
Timezone:	Asia/Shanghai

Set Location

Other stars in Centaurus