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: 6:52  
clear_day Transit: 12:49  
SunsetSet: 18:46 south
sunny DaytimeWhat's Visible Now
All Constellations » Monoceros » 


Altitude: -19.8°   Azimuth: 278.4°   Direction: West

HR2739 is a hypergiant star in the constellation of Monoceros.

HR2739 visual magnitude is 6.03. Because of its reltive faintness, HR2739 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 HR2739:


HR2739 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -19.8°
Azimuth: 278.4°
Direction: West

Celestial coordinates and finder chart of HR2739

HR2739 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 HR2739 are provided in the following table:

07h 14m 28s
-10° 19’ 00”

The simplified sky map below shows the position of HR2739 in the sky:

Finder chart HR2739 star
Simplified finder chart for HR2739.

Visibility of HR2739 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 HR2739 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: 100.3°
Max altitude: 28.2°
Azimuth: 259.7°

Digitized Sky Survey image of HR2739

The image below is a photograph of HR2739 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 HR2739 is -0.004 arcsec per year in Right Ascension and -0.011 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR2739 star
DSS2 image of HR2739. The red arrow shows the motion of HR2739 during the next 10000 years (-0.67 arcmin in Right Ascension and -1.83 arcmin in declination);

Distance of HR2739 from the Sun and relative movement

HR2739 is distant 2,432.84 light years from the Sun and it is moving far from the Sun at the speed of 33 kilometers per second.

746.27 pc
2,432.84 ly
33 km/s
-0.004 arcsec/year
-0.011 arcsec/year

Spectral properties of HR2739

HR2739 belongs to spectral class B0 and has a luminosity class of III corresponding to a hypergiant star.


The red dot in the diagram below shows where HR2739 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR2739. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR2739