HR4551

Below the horizon. Rise: 11:19 | Tran: 17:17 | Set: 23:18

Alt: -7.57° Az: 212.09° Direction: South-South-West

HR4551 is a multiple main-sequence star of spectral class A2 in the constellation of Centaurus.

HR4551 visual magnitude is 5.57. Because of its faintness, HR4551 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 HR4551. The red arrow shows the motion of HR4551 during the next 1000 years (-1.98 arcmin in Right Ascension and 0.55 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 11h 53m 26s

Declination -57° 07’ 46”

Hour Angle 06h 55m 57s

Sidereal Time 18h 49m 24s

J2000

Right Ascension 11h 52m 10s

Declination -56° 59’ 16”

Galactic Coordinates

Galactic Longitude 294.89°

Galactic Latitude 4.96°

Finder Chart

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Finder chart for HR4551.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.57

Class Main-sequence

Absolute magnitude 0.47

Spectral Type A2V

Color Index (B-V) 0.07

Temperature 9328K

The red dot in the diagram below shows where HR4551 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR4551. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR4551 is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the HR4551 double sysyem:

Main star magnitude 5.57

Secondary star magnitude 10.87

Magnitude difference 5.3

Separation 54.6 arcsec

Distance, Radial Speed, Proper Motion

HR4551 is distant 340.65 light years from the Sun and it is moving far from the Sun at the speed of 23 kilometers per second.

Distance (parsec) 104.49

Distance (light year) 340.65

Radial Speed 23 km/s

Proper Motion RA -0.119 arcsec/y

Proper Motion Dec 0.033"/y

Alternative Designations

Henry Draper Catalogue HD103101

SAO Catalogue SAO239443

Hipparcos Catalogue HIP57870

Durchmusterung Catalogue CP-56 4836

Visibility from Your Location

Today's HR4551 rise, transit and set times from Cayambe, Ecuador are the following (all times relative to the local timezone America/Guayaquil):

Azimuth: 147.1° RISE 11:19

Max altitude: 32.8° TRANSIT 17:17

Azimuth: 212.9° SET 23:18

Name:	Cayambe, Ecuador
Latitude:	0° 2' 27.0" N
Longitude:	78° 8' 42.7" W
Timezone:	America/Guayaquil

Set Location

Other stars in Centaurus