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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: 7:47  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
sunny DaytimeWhat's Visible Now?
All Constellations » Carina » 


Altitude: -32.1°   Azimuth: 208.8°   Direction: South-South-West

HR4128 is a double giant star in the constellation of Carina.

HR4128 visual magnitude is 6.43. Because of its reltive faintness, HR4128 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 HR4128:


HR4128 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -32.1°
Azimuth: 208.8°
Direction: South-South-West

Celestial coordinates and finder chart of HR4128

HR4128 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 HR4128 are provided in the following table:

10h 30m 39s
-61° 21’ 21”

The simplified sky map below shows the position of HR4128 in the sky:

Finder chart HR4128 star
Simplified finder chart for HR4128.

Visibility of HR4128 from your location

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

HR4128 is currently not visible from Greenwich, United Kingdom edit_location_alt

Digitized Sky Survey image of HR4128

The image below is a photograph of HR4128 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 HR4128 is -0.003 arcsec per year in Right Ascension and 0.022 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR4128 star
DSS2 image of HR4128. The red arrow shows the motion of HR4128 during the next 10000 years (-0.50 arcmin in Right Ascension and 3.67 arcmin in declination);

Distance of HR4128 from the Sun and relative movement

HR4128 is distant 810.95 light years from the Sun and it is moving towards the Sun at the speed of 4 kilometers per second.

248.76 pc
810.95 ly
-4 km/s
-0.003 arcsec/year
0.022 arcsec/year

Spectral properties of HR4128

HR4128 belongs to spectral class M2 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR4128 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4128. Attribution: Richard Powell / CC BY-SA

HR4128 star system properties

HR4128 is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the HR4128 double sysyem:

82.6 arcsec

Alternative designations of HR4128