HR12

Below the horizon. Rise: 5:37 | Tran: 9:31 | Set: 13:26

Alt: -37.28° Az: 280.85° Direction: West

HR12 is a variable and double main-sequence star of spectral class A2 in the constellation of Cetus.

HR12 visual magnitude is 5.94. Because of its faintness, HR12 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 HR12. The red arrow shows the motion of HR12 during the next 10000 years (8.67 arcmin in Right Ascension and -7.33 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 00h 09m 04s

Declination -22° 22’ 03”

Hour Angle 08h 09m 16s

Sidereal Time 08h 18m 21s

J2000

Right Ascension 00h 07m 46s

Declination -22° 30’ 32”

Galactic Coordinates

Galactic Longitude 55.56°

Galactic Latitude -79.07°

Finder Chart

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Finder chart for HR12.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.94

Class Main-sequence

Absolute magnitude 1.42

Spectral Type A2V

Color Index (B-V) 0.14

Temperature 8658K

The red dot in the diagram below shows where HR12 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR12. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR12 is a visual double star which can be observed with the help of medium or large telescopes. The table below shows key information about the HR12 double sysyem:

Main star magnitude 5.94

Secondary star magnitude 11.04

Magnitude difference 5.1

Separation 1.9 arcsec

Distance, Radial Speed, Proper Motion

HR12 is distant 261.85 light years from the Sun and it is moving towards the Sun at the speed of 13 kilometers per second.

Distance (parsec) 80.32

Distance (light year) 261.85

Radial Speed -13 km/s

Proper Motion RA 0.052 arcsec/y

Proper Motion Dec -0.044"/y

Alternative Designations

Henry Draper Catalogue HD319

SAO Catalogue SAO166066

Hipparcos Catalogue HIP636

Durchmusterung Catalogue CD-23 13

General Catalogue of Variable Stars 46

Aitken Double Star Catalogue ADS89

Visibility from Your Location

Today's HR12 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 112.4° RISE 5:37

Max altitude: 16.2° TRANSIT 9:31

Azimuth: 247.6° SET 13:26

Set Location

Other stars in Cetus