Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:43  
clear_day Transit: 12:58  
SunsetSet: 21:13 south
wb_twilight Astronomical TwilightWhat's Visible Now
All Constellations » Camelopardalis » 


Altitude: 35.6°   Azimuth: 3.1°   Direction: North

HR1643 is a variable star in the constellation of Camelopardalis.

HR1643 visual magnitude is 5.43. Because of its reltive faintness, HR1643 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 HR1643:


HR1643 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 35.6°
Azimuth: 3.1°
Direction: North

Celestial coordinates and finder chart of HR1643

HR1643 is situated close to the northern celestial pole and, as such, it is visible for most part of the year from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR1643 are provided in the following table:

05h 12m 22s
+73° 56’ 48”

The simplified sky map below shows the position of HR1643 in the sky:

Finder chart HR1643 star
Simplified finder chart for HR1643.

Visibility of HR1643 from your location

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

HR1643 is circumpolar and transits at 11:54 UTC (altitude: 67.5°)

Digitized Sky Survey image of HR1643

The image below is a photograph of HR1643 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 HR1643 is 0 arcsec per year in Right Ascension and -0.025 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR1643 star
DSS2 image of HR1643. The red arrow shows the motion of HR1643 during the next 10000 years (0.00 arcmin in Right Ascension and -4.17 arcmin in declination);

Distance of HR1643 from the Sun and relative movement

HR1643 is distant 374.28 light years from the Sun and it is moving far from the Sun at the speed of 9 kilometers per second.

114.81 pc
374.28 ly
9 km/s
-0.025 arcsec/year

Spectral properties of HR1643

HR1643 belongs to spectral class B9 HR1643 is also a Si chemically peculiar star.


The red dot in the diagram below shows where HR1643 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR1643. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR1643