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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
north SunriseRise: 7:40  
clear_day Transit: 11:47  
SunsetSet: 15:53 south
sunny DaytimeWhat's Visible Now?
All Constellations » Taurus » 


Altitude: -7.9°   Azimuth: 43.7°   Direction: North-East

HR1642 is a double star in the constellation of Taurus.

HR1642 visual magnitude is 6.44. Because of its reltive faintness, HR1642 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 HR1642:


HR1642 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -7.9°
Azimuth: 43.7°
Direction: North-East

Celestial coordinates and finder chart of HR1642

HR1642 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 HR1642 are provided in the following table:

05h 05m 32s
+19° 48’ 23”

The simplified sky map below shows the position of HR1642 in the sky:

Finder chart HR1642 star
Simplified finder chart for HR1642.

Visibility of HR1642 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 HR1642 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: 70.2°
Max altitude: 58.3°
Azimuth: 289.8°

Digitized Sky Survey image of HR1642

The image below is a photograph of HR1642 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 HR1642 is -0.009 arcsec per year in Right Ascension and -0.022 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR1642 star
DSS2 image of HR1642. The red arrow shows the motion of HR1642 during the next 10000 years (-1.50 arcmin in Right Ascension and -3.67 arcmin in declination);

Distance of HR1642 from the Sun and relative movement

HR1642 is distant 463.73 light years from the Sun and it is moving towards the Sun at the speed of 17 kilometers per second.

142.25 pc
463.73 ly
-17 km/s
-0.009 arcsec/year
-0.022 arcsec/year

Spectral properties of HR1642

HR1642 belongs to spectral class A5


The red dot in the diagram below shows where HR1642 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR1642. Attribution: Richard Powell / CC BY-SA

HR1642 star system properties

HR1642 is a visual double star which can be observed with the help of large telescopes. The table below shows key information about the HR1642 double sysyem:

1.1 arcsec

Alternative designations of HR1642