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: 6:47  
clear_day Transit: 12:50  
SunsetSet: 18:52 south
sunny DaytimeWhat's Visible Now
All Constellations » Taurus » 


Altitude: 31.5°   Azimuth: 264.0°   Direction: West

HR1977 is a variable bright giant star in the constellation of Taurus.

HR1977 visual magnitude is 6.95. Because of its reltive faintness, HR1977 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 HR1977:

Bright giant

HR1977 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 31.5°
Azimuth: 264.0°
Direction: West

Celestial coordinates and finder chart of HR1977

HR1977 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 HR1977 are provided in the following table:

05h 45m 39s
+20° 41’ 42”

The simplified sky map below shows the position of HR1977 in the sky:

Finder chart HR1977 star
Simplified finder chart for HR1977.

Visibility of HR1977 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 HR1977 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: 69.3°
Max altitude: 59.2°
Azimuth: 290.7°

Digitized Sky Survey image of HR1977

The image below is a photograph of HR1977 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 HR1977 is -0.001 arcsec per year in Right Ascension and 0 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of HR1977 star
DSS2 image of HR1977. The red arrow shows the motion of HR1977 during the next 100000 years (-1.67 arcmin in Right Ascension and 0.00 arcmin in declination);

Distance of HR1977 from the Sun and relative movement

HR1977 is distant 876.34 light years from the Sun and it is moving far from the Sun at the speed of 17 kilometers per second.

268.82 pc
876.34 ly
17 km/s
-0.001 arcsec/year

Spectral properties of HR1977

HR1977 belongs to spectral class C5 and has a luminosity class of II corresponding to a bright giant star.


The red dot in the diagram below shows where HR1977 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR1977. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR1977