HR4128

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:

Color of HR4128 ⬤

Magnitude of HR4128 6.43

Class Giant

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

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:

Right Ascension J2000 10h 30m 39s

Declination J2000 -61° 21’ 21”

Galactic Longitude 286.87°

Galactic Latitude -2.95°

Constellation Carina

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

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.

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.

Distance (parsec) 248.76 pc

Distance (light year) 810.95 ly

Heliocentric radial velocity -4 km/s

Proper Motion RA -0.003 arcsec/year

Proper Motion Dec 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.

Absolute magnitude -0.55

Spectral Type M2III

Color Index (B-V) 1.76

Temperature of HR4128 3440K

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

Main star magnitude 6.43

Secondary star magnitude 7.63

Magnitude difference 1.2

Separation 82.6 arcsec

Alternative designations of HR4128

Henry Draper Catalogue HD91270

SAO Catalogue SAO250992

Hipparcos Catalogue HIP51461

Durchmusterung Catalogue CP-60 1945

In Evidence

Other stars in Carina