Your guide to the Solar System and the night sky
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🌎  Observing from: Greenwich, United Kingdom [change]
🌅 Sunrise: 6:45  ☀️ Transit: 13:03  🌅 Sunset: 19:23


HR577 is a multiple hypergiant star in the constellation of Aries.

HR577 visual magnitude is 5.87. Because of its reltive faintness, HR577 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 HR577:

HR577 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 57°.

Celestial coordinates and finder chart of HR577

HR577 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 HR577 are provided in the following table:

01h 59m 35s
+21° 03’ 29”

The simplified sky map below shows the position of HR577 in the sky:

Finder chart HR577 star
Simplified finder chart for HR577.

Visibility of HR577 from your location

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

Today's HR577 rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 68.9°
Max altitude: 59.6°
Azimuth: 291.1°
HR577 is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR577

The image below is a photograph of HR577 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 HR577 is 0.139 arcsec per year in Right Ascension and -0.022 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR577 star
DSS2 image of HR577. The red arrow shows the motion of HR577 during the next 1000 years (2.32 arcmin in Right Ascension and -0.37 arcmin in declination);

Distance of HR577 from the Sun and relative movement

HR577 is distant 399.02 light years from the Sun and it is moving towards the Sun at the speed of 2 kilometers per second.

122.40 pc
399.02 ly
-2 km/s
0.139 arcsec/year
-0.022 arcsec/year

Spectral properties of HR577

HR577 belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.


The red dot in the diagram below shows where HR577 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR577. Attribution: Richard Powell / CC BY-SA

HR577 star system properties

HR577 is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the HR577 double sysyem:

188.1 arcsec

Alternative designations of HR577