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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:51  
clear_day Transit: 11:50  
SunsetSet: 15:49 south
wb_twilight Astronomical TwilightWhat's Visible Now?
All Constellations » Cetus » 


Altitude: 14.2°   Azimuth: 162.3°   Direction: South-South-East

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

HR12 visual magnitude is 5.94. Because of its reltive faintness, HR12 should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about HR12:


HR12 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 14.2°
Azimuth: 162.3°
Direction: South-South-East

Celestial coordinates and finder chart of HR12

HR12 is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR12 are provided in the following table:

00h 07m 46s
-22° 30’ 32”

The simplified sky map below shows the position of HR12 in the sky:

Finder chart HR12 star
Simplified finder chart for HR12.

Visibility of HR12 from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

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

Azimuth: 112.5°
Max altitude: 16.0°
Azimuth: 247.5°

Digitized Sky Survey image of HR12

The image below is a photograph of HR12 from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of HR12 is 0.052 arcsec per year in Right Ascension and -0.044 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR12 star
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);

Distance of HR12 from the Sun and relative movement

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.

80.32 pc
261.85 ly
-13 km/s
0.052 arcsec/year
-0.044 arcsec/year

Spectral properties of HR12

HR12 belongs to spectral class A2 and has a luminosity class of V corresponding to a main-sequence star.


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

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

HR12 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:

1.9 arcsec

Alternative designations of HR12