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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
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All Constellations » Carina » 


Altitude: -52.0°   Azimuth: 148.3°   Direction: South-South-East

HR3642 is a variable sub-giant star in the constellation of Carina.

HR3642 visual magnitude is 4.71. Because of its moderate brightness, HR3642 should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about HR3642:


HR3642 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -52.0°
Azimuth: 148.3°
Direction: South-South-East

Celestial coordinates and finder chart of HR3642

HR3642 is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR3642 are provided in the following table:

09h 05m 38s
-70° 32’ 20”

The simplified sky map below shows the position of HR3642 in the sky:

Finder chart HR3642 star
Simplified finder chart for HR3642.

Visibility of HR3642 from your location

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

HR3642 is currently not visible from Greenwich, United Kingdom edit_location_alt

Digitized Sky Survey image of HR3642

The image below is a photograph of HR3642 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 HR3642 is -0.008 arcsec per year in Right Ascension and -0.005 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of HR3642 star
DSS2 image of HR3642. The red arrow shows the motion of HR3642 during the next 100000 years (-13.33 arcmin in Right Ascension and -8.33 arcmin in declination);

Distance of HR3642 from the Sun and relative movement

HR3642 is distant 1,079.47 light years from the Sun and it is moving far from the Sun at the speed of 19 kilometers per second.

331.13 pc
1,079.47 ly
19 km/s
-0.008 arcsec/year
-0.005 arcsec/year

Spectral properties of HR3642

HR3642 belongs to spectral class B2 and has a luminosity class of IV corresponding to a sub-giant star.


The red dot in the diagram below shows where HR3642 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR3642. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR3642