Your Guide to the Solar System and the Night Sky
Donate now! You'll help cover server costs, enhance the site and keep it ad-free.
public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:44  
clear_day Transit: 12:57  
SunsetSet: 21:11 south
wb_twilight Astronomical TwilightWhat's Visible Now
All Constellations » Carina » 


Altitude: -79.5°   Azimuth: 257.3°   Direction: West-South-West

HR3100 is a giant star in the constellation of Carina.

HR3100 visual magnitude is 6.38. Because of its reltive faintness, HR3100 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 HR3100:


HR3100 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -79.5°
Azimuth: 257.3°
Direction: West-South-West

Celestial coordinates and finder chart of HR3100

HR3100 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 HR3100 are provided in the following table:

07h 55m 00s
-52° 34’ 59”

The simplified sky map below shows the position of HR3100 in the sky:

Finder chart HR3100 star
Simplified finder chart for HR3100.

Visibility of HR3100 from your location

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

HR3100 is currently not visible from Greenwich, United Kingdom edit_location_alt

Digitized Sky Survey image of HR3100

The image below is a photograph of HR3100 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 HR3100 is -0.008 arcsec per year in Right Ascension and 0.017 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR3100 star
DSS2 image of HR3100. The red arrow shows the motion of HR3100 during the next 10000 years (-1.33 arcmin in Right Ascension and 2.83 arcmin in declination);

Distance of HR3100 from the Sun and relative movement

HR3100 is distant 1,003.08 light years from the Sun and it is moving far from the Sun at the speed of 7 kilometers per second.

307.69 pc
1,003.08 ly
7 km/s
-0.008 arcsec/year
0.017 arcsec/year

Spectral properties of HR3100

HR3100 belongs to spectral class B8 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR3100 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR3100. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR3100