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: 7:04  
clear_day Transit: 12:47  
SunsetSet: 18:30 south
sunny DaytimeWhat's Visible Now
All Constellations » Taurus » 


Altitude: 33.5°   Azimuth: 271.8°   Direction: West

HR1921 is a giant star in the constellation of Taurus.

HR1921 visual magnitude is 6.37. Because of its reltive faintness, HR1921 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 HR1921:


HR1921 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 33.5°
Azimuth: 271.8°
Direction: West

Celestial coordinates and finder chart of HR1921

HR1921 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 HR1921 are provided in the following table:

05h 38m 57s
+26° 37’ 04”

The simplified sky map below shows the position of HR1921 in the sky:

Finder chart HR1921 star
Simplified finder chart for HR1921.

Visibility of HR1921 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 HR1921 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: 63.4°
Max altitude: 65.1°
Azimuth: 296.6°

Digitized Sky Survey image of HR1921

The image below is a photograph of HR1921 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 HR1921 is 0.024 arcsec per year in Right Ascension and -0.018 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR1921 star
DSS2 image of HR1921. The red arrow shows the motion of HR1921 during the next 10000 years (4.00 arcmin in Right Ascension and -3.00 arcmin in declination);

Distance of HR1921 from the Sun and relative movement

HR1921 is distant 426.14 light years from the Sun and it is moving far from the Sun at the speed of 15 kilometers per second.

130.72 pc
426.14 ly
15 km/s
0.024 arcsec/year
-0.018 arcsec/year

Spectral properties of HR1921

HR1921 belongs to spectral class G9 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR1921 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR1921. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR1921