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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: 7:48  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
wb_twilight Civil TwilightWhat's Visible Now?
All Constellations » Carina » 


Altitude: -29.8°   Azimuth: 198.2°   Direction: South-South-West

HR3948 is a hypergiant star in the constellation of Carina.

HR3948 visual magnitude is 6.58. Because of its reltive faintness, HR3948 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 HR3948:


HR3948 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -29.8°
Azimuth: 198.2°
Direction: South-South-West

Celestial coordinates and finder chart of HR3948

HR3948 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 HR3948 are provided in the following table:

09h 57m 15s
-64° 29’ 21”

The simplified sky map below shows the position of HR3948 in the sky:

Finder chart HR3948 star
Simplified finder chart for HR3948.

Visibility of HR3948 from your location

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

HR3948 is currently not visible from Greenwich, United Kingdom edit_location_alt

Digitized Sky Survey image of HR3948

The image below is a photograph of HR3948 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 HR3948 is -0.13 arcsec per year in Right Ascension and 0.084 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR3948 star
DSS2 image of HR3948. The red arrow shows the motion of HR3948 during the next 1000 years (-2.17 arcmin in Right Ascension and 1.40 arcmin in declination);

Distance of HR3948 from the Sun and relative movement

HR3948 is distant 486.57 light years from the Sun and it is moving far from the Sun at the speed of 45 kilometers per second.

149.25 pc
486.57 ly
45 km/s
-0.13 arcsec/year
0.084 arcsec/year

Spectral properties of HR3948

HR3948 belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.


The red dot in the diagram below shows where HR3948 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR3948. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR3948