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


HR4668 is a variable hypergiant star in the constellation of Coma Berenices.

HR4668 visual magnitude is 5. Because of its moderate brightness, HR4668 should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about HR4668:

HR4668 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 9°.

Celestial coordinates and finder chart of HR4668

HR4668 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 HR4668 are provided in the following table:

12h 16m 30s
+33° 03’ 41”
Coma Berenices

The simplified sky map below shows the position of HR4668 in the sky:

Finder chart HR4668 star
Simplified finder chart for HR4668.

Visibility of HR4668 from your location

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

Today's HR4668 rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 56.9°
Max altitude: 71.6°
Azimuth: 303.1°
HR4668 is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR4668

The image below is a photograph of HR4668 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 HR4668 is -0.053 arcsec per year in Right Ascension and -0.111 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR4668 star
DSS2 image of HR4668. The red arrow shows the motion of HR4668 during the next 1000 years (-0.88 arcmin in Right Ascension and -1.85 arcmin in declination);

Distance of HR4668 from the Sun and relative movement

HR4668 is distant 306.10 light years from the Sun and it is moving towards the Sun at the speed of 42 kilometers per second.

93.90 pc
306.10 ly
-42 km/s
-0.053 arcsec/year
-0.111 arcsec/year

Spectral properties of HR4668

HR4668 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 HR4668 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4668. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4668