Your guide to the Solar System and the night sky
🌎 Location: Greenwich, United Kingdom [change]

HR654

HR654 is a variable and double supergiant star in the constellation of Perseus.

HR654 visual magnitude is 6.48. Because of its reltive faintness, HR654 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 HR654:

6.48
Supergiant
HR654 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 23°.

Celestial coordinates and finder chart of HR654

HR654 is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR654 are provided in the following table:

02h 16m 51s
+57° 03’ 19”
134.38°
-3.91°
Perseus

The simplified sky map below shows the position of HR654 in the sky:

Finder chart HR654 star
Simplified finder chart for HR654.

Visibility of HR654 from your location

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

HR654 is circumpolar and transits at 02:23 UTC (altitude: 84.4°)

Digitized Sky Survey image of HR654

The image below is a photograph of HR654 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 HR654 is 0.001 arcsec per year in Right Ascension and -0.002 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of HR654 star
DSS2 image of HR654. The red arrow shows the motion of HR654 during the next 100000 years (1.67 arcmin in Right Ascension and -3.33 arcmin in declination);

Distance of HR654 from the Sun and relative movement

HR654 is distant 2,379.56 light years from the Sun and it is moving towards the Sun at the speed of 42 kilometers per second.

729.93 pc
2,379.56 ly
-42 km/s
0.001 arcsec/year
-0.002 arcsec/year

Spectral properties of HR654

HR654 belongs to spectral class B1 and has a luminosity class of I corresponding to a supergiant star.

-2.84
B1I
7591K

The red dot in the diagram below shows where HR654 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR654. Attribution: Richard Powell / CC BY-SA

HR654 star system properties

HR654 is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the HR654 double sysyem:

6.48
7.38
0.9
103 arcsec

Alternative designations of HR654

SAO23115
SAO23115