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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 5:41  
clear_day Transit: 12:56  
SunsetSet: 20:12
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All Constellations » Coma Berenices » 

HR4642

Altitude: 16.2°   Azimuth: 295.8°   Direction: West-North-West

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 skies, while it is not visible at all from skies affected by light pollution.

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.

Image of HR4642 star
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);

Key facts about HR4642

6.49
Main-sequence

HR4642 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 16.2°
Azimuth: 295.8°
Direction: West-North-West

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:

12h 12m 01s
+28° 32’ 09”
201.47°
81.17°
Coma Berenices

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

Finder chart HR4642 star
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°
Max altitude: 67.1°
Azimuth: 298.5°

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.

80.65 pc
262.90 ly
-15 km/s
0.097 arcsec/year
-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.

1.96
F5V
7101K

The red dot in the diagram below shows where HR4642 is situated in the Hertzsprungā€“Russell diagram.

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

Alternative designations of HR4642

SAO82181
SAO82181