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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: 6:59  
clear_day Transit: 12:12  
SunsetSet: 17:25
sunny DaytimeWhat's Visible Now?
All Constellations » Columba » 


Altitude: -51.6°   Azimuth: 84.5°   Direction: East

HR1881 is a variable hypergiant star in the constellation of Columba.

HR1881 visual magnitude is 5.78. Because of its reltive faintness, HR1881 should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The proper motion of HR1881 is 0.097 arcsec per year in Right Ascension and -0.041 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR1881 star
DSS2 image of HR1881. The red arrow shows the motion of HR1881 during the next 1000 years (1.62 arcmin in Right Ascension and -0.68 arcmin in declination);

Key facts about HR1881


HR1881 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -51.6°
Azimuth: 84.5°
Direction: East

Celestial coordinates and finder chart of HR1881

HR1881 is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR1881 are provided in the following table:

05h 33m 07s
-35° 08’ 22”

The simplified sky map below shows the position of HR1881 in the sky:

Finder chart HR1881 star
Simplified finder chart for HR1881.

Visibility of HR1881 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 HR1881 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: 125.1°
Max altitude: 3.4°
Azimuth: 234.9°

Distance of HR1881 from the Sun and relative movement

HR1881 is distant 277.68 light years from the Sun and it is moving far from the Sun at the speed of 15 kilometers per second.

85.18 pc
277.68 ly
15 km/s
0.097 arcsec/year
-0.041 arcsec/year

Spectral properties of HR1881

HR1881 belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.


The red dot in the diagram below shows where HR1881 is situated in the HertzsprungÔÇôRussell diagram.

HR Diagram
H-R diagram showing the position of HR1881. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR1881