HR4557

Below the horizon. Rise: 12:35 | Tran: 13:23 | Set: 14:12

Alt: -54.16° Az: 273.17° Direction: West

HR4557 is a double main-sequence star of spectral class F7 in the constellation of Centaurus.

HR4557 visual magnitude is 6.46. Because of its faintness, HR4557 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 HR4557. The red arrow shows the motion of HR4557 during the next 1000 years (-5.15 arcmin in Right Ascension and 1.00 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 11h 55m 41s

Declination -37° 53’ 10”

Hour Angle 08h 48m 50s

Sideral Time 20h 44m 31s

J2000

Right Ascension 11h 54m 25s

Declination -37° 44’ 56”

Galactic Coordinates

Galactic Longitude 290.66°

Galactic Latitude 23.76°

Finder Chart

Simplified finder chart for HR4557.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.46

Class Main-sequence

Absolute magnitude 3.12

Spectral Type F7V

Color Index (B-V) 0.52

Temperature 6300K

The red dot in the diagram below shows where HR4557 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR4557. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR4557 is a visual double star which can be observed with the help of large telescopes. The table below shows key information about the HR4557 double sysyem:

Main star magnitude 6.46

Secondary star magnitude 7.76

Magnitude difference 1.3

Separation 1.1 arcsec

Distance, Radial Speed, Proper Motion

HR4557 is distant 151.63 light years from the Sun and it is moving towards the Sun at the speed of 12 kilometers per second.

Distance (parsec) 46.51

Distance (light year) 151.63

Radial Speed -12 km/s

Proper Motion RA -0.309 arcsec/y

Proper Motion Dec 0.06"/y

Alternative Designations

Henry Draper Catalogue HD103437

SAO Catalogue SAO202926

Hipparcos Catalogue HIP58057

Durchmusterung Catalogue CD-37 7536

Gliese Catalogue Gl 452.2A

Visibility from Your Location

Today's HR4557 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 127.9° RISE 12:35

Max altitude: 0.6° TRANSIT 13:23

Azimuth: 232.1° SET 14:12

Name:	Greenwich, UK
Latitude:	51° 28' 48.0" N
Longitude:	0° 0' 0.0" E
Timezone:	Europe/London

Location

Other stars in Centaurus