We use cookies to deliver essential features and to measure their performance. By using this site you accept our Privacy Policies.
A Complete Guide to the Solar System and the Night Sky
Your support helps us pay the server bills » Donate
public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 6:35  
clear_day Transit: 12:10  
SunsetSet: 17:45
sleep NighttimeWhat's Visible Now?
All Constellations » Carina » 


Altitude: -49.0°   Azimuth: 207.1°   Direction: South-South-West

HR3643 is a bright giant star in the constellation of Carina.

HR3643 visual magnitude is 4.48. Because of its moderate brightness, HR3643 should be easily visible from locations with dark skies, while it can be barely visible, or not visible at all, from skies affected by light pollution.

The proper motion of HR3643 is -0.013 arcsec per year in Right Ascension and -0.005 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR3643 star
DSS2 image of HR3643. The red arrow shows the motion of HR3643 during the next 10000 years (-2.17 arcmin in Right Ascension and -0.83 arcmin in declination);

Key facts about HR3643

Bright giant

HR3643 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -49.0°
Azimuth: 207.1°
Direction: South-South-West

Celestial coordinates and finder chart of HR3643

HR3643 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 HR3643 are provided in the following table:

09h 05m 08s
-72° 36’ 10”

The simplified sky map below shows the position of HR3643 in the sky:

Finder chart HR3643 star
Simplified finder chart for HR3643.

Visibility of HR3643 from your location

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

HR3643 is currently not visible from Greenwich, United Kingdom edit_location_alt

Distance of HR3643 from the Sun and relative movement

HR3643 is distant 454.04 light years from the Sun and it is moving far from the Sun at the speed of 22 kilometers per second.

139.28 pc
454.04 ly
22 km/s
-0.013 arcsec/year
-0.005 arcsec/year

Spectral properties of HR3643

HR3643 belongs to spectral class F9 and has a luminosity class of II corresponding to a bright giant star.


The red dot in the diagram below shows where HR3643 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR3643. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR3643