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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 4:49 
Transit: 12:57 
Sunset: 21:06
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All Constellations » Centaurus » 

HR4557

Below the horizon.  Rise: 19:25 | Tran: 20:13 | Set: 21:01
Alt: -31.66°   Az: 247.43°   Direction: West-South-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.

Image of HR4557 star
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

11h 55m 43s
-37° 53’ 25”
06h 20m 43s
18h 16m 26s

J2000

11h 54m 25s
-37° 44’ 56”

Galactic Coordinates

290.66°
23.76°

Finder Chart

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Finder chart for HR4557.

Magnitude, Color, Spectral Class

6.46
Main-sequence

3.12
F7V
6300K

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

HR 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:

6.46
7.76
1.3
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.

46.51
151.63
-12 km/s
-0.309 arcsec/y
0.06"/y

Alternative Designations

SAO202926
SAO202926
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°
Max altitude: 0.6°
Azimuth: 232.1°