HR4055

Above the horizon. Rise: 13:57 | Tran: 18:50 | Set: 23:43

Alt: 15.91° Az: 136.38° Direction: South-East

HR4055 is a double main-sequence star of spectral class A9 in the constellation of Hydra.

HR4055 visual magnitude is 6. Because of its faintness, HR4055 is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

DSS2 image of HR4055. The red arrow shows the motion of HR4055 during the next 10000 years (-2.33 arcmin in Right Ascension and -3.17 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 10h 20m 31s

Declination -12° 39’ 22”

Hour Angle 21h 08m 37s

Sidereal Time 07h 29m 08s

J2000

Right Ascension 10h 19m 16s

Declination -12° 31’ 41”

Galactic Coordinates

Galactic Longitude 255.04°

Galactic Latitude 35.83°

Finder Chart

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Finder chart for HR4055.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6

Class Main-sequence

Absolute magnitude 1.88

Spectral Type A9V

Color Index (B-V) 0.26

Temperature 7726K

The red dot in the diagram below shows where HR4055 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR4055. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR4055 is a visual double star which can be observed with the help of large telescopes. The table below shows key information about the HR4055 double sysyem:

Main star magnitude 6

Secondary star magnitude 7.3

Magnitude difference 1.3

Separation 0.6 arcsec

Distance, Radial Speed, Proper Motion

HR4055 is distant 217.19 light years from the Sun and it is moving towards the Sun at the speed of 16 kilometers per second.

Distance (parsec) 66.62

Distance (light year) 217.19

Radial Speed -16 km/s

Proper Motion RA -0.014 arcsec/y

Proper Motion Dec -0.019"/y

Alternative Designations

Henry Draper Catalogue HD89455

SAO Catalogue SAO155894

Hipparcos Catalogue HIP50536

Durchmusterung Catalogue BD-11 2851

Visibility from Your Location

Today's HR4055 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 102.7° RISE 13:57

Max altitude: 25.9° TRANSIT 18:50

Azimuth: 257.3° SET 23:43

Set Location

Other stars in Hydra