HR4642

HR4642 is a main-sequence star in the constellation of Coma Berenices.

HR4642 visual magnitude is 6.49. Because of its reltive faintness, HR4642 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 HR4642:

Color of HR4642 ⬤

Magnitude of HR4642 6.49

Class Main-sequence

VISIBILITY RIGHT NOW HR4642 is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 28°.

Celestial coordinates and finder chart of HR4642

HR4642 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 HR4642 are provided in the following table:

Right Ascension J2000 12h 12m 01s

Declination J2000 +28° 32’ 09”

Galactic Longitude 201.47°

Galactic Latitude 81.17°

Constellation Coma Berenices

The simplified sky map below shows the position of HR4642 in the sky:

Simplified finder chart for HR4642.

Visibility of HR4642 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 HR4642 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: 61.5° RISE 11:34

Max altitude: 67.1° TRANSIT 20:24

Azimuth: 298.5° SET 5:17

RIGHT NOW HR4642 is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR4642

The image below is a photograph of HR4642 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 HR4642 is 0.097 arcsec per year in Right Ascension and -0.071 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

DSS2 image of HR4642. The red arrow shows the motion of HR4642 during the next 1000 years (1.62 arcmin in Right Ascension and -1.18 arcmin in declination);

Distance of HR4642 from the Sun and relative movement

HR4642 is distant 262.90 light years from the Sun and it is moving towards the Sun at the speed of 15 kilometers per second.

Distance (parsec) 80.65 pc

Distance (light year) 262.90 ly

Heliocentric radial velocity -15 km/s

Proper Motion RA 0.097 arcsec/year

Proper Motion Dec -0.071 arcsec/year

Spectral properties of HR4642

HR4642 belongs to spectral class F5 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude 1.96

Spectral Type F5V

Color Index (B-V) 0.36

Temperature of HR4642 7101K

The red dot in the diagram below shows where HR4642 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR4642. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4642

Henry Draper Catalogue HD106022

SAO Catalogue SAO82181

Hipparcos Catalogue HIP59489

Durchmusterung Catalogue BD+29 2265

In Evidence

Other stars in Coma Berenices