Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:50  
clear_day Transit: 12:56  
SunsetSet: 21:02 south
sunny DaytimeWhat's Visible Now
All Constellations » Hydra » 


HR3557 is a bright giant star in the constellation of Hydra.

HR3557 visual magnitude is 6.14. Because of its reltive faintness, HR3557 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 HR3557:

Bright giant
HR3557 is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 7°.

Celestial coordinates and finder chart of HR3557

HR3557 is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR3557 are provided in the following table:

08h 56m 36s
+04° 14’ 12”

The simplified sky map below shows the position of HR3557 in the sky:

Finder chart HR3557 star
Simplified finder chart for HR3557.

Visibility of HR3557 from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's HR3557 rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 85.8°
Max altitude: 42.8°
Azimuth: 274.2°
HR3557 is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR3557

The image below is a photograph of HR3557 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 HR3557 is -0.02 arcsec per year in Right Ascension and 0.005 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR3557 star
DSS2 image of HR3557. The red arrow shows the motion of HR3557 during the next 10000 years (-3.33 arcmin in Right Ascension and 0.83 arcmin in declination);

Distance of HR3557 from the Sun and relative movement

HR3557 is distant 1,015.58 light years from the Sun and it is moving towards the Sun at the speed of 12 kilometers per second.

311.53 pc
1,015.58 ly
-12 km/s
-0.02 arcsec/year
0.005 arcsec/year

Spectral properties of HR3557

HR3557 belongs to spectral class G8 and has a luminosity class of II corresponding to a bright giant star.


The red dot in the diagram below shows where HR3557 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR3557. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR3557