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: 4:52  
clear_day Transit: 12:55  
SunsetSet: 20:59 south
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All Constellations » Puppis » 

HR2740

HR2740 is a variable hypergiant star in the constellation of Puppis.

HR2740 visual magnitude is 4.49. Because of its moderate brightness, HR2740 should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about HR2740:

4.49
Hypergiant
HR2740 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of HR2740

HR2740 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 HR2740 are provided in the following table:

07h 12m 33s
-46° 45’ 33”
257.72°
-16.02°
Puppis

The simplified sky map below shows the position of HR2740 in the sky:

Finder chart HR2740 star
Simplified finder chart for HR2740.

Visibility of HR2740 from your location

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

HR2740 is currently not visible from Greenwich, United Kingdom edit_location_alt

Digitized Sky Survey image of HR2740

The image below is a photograph of HR2740 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 HR2740 is -0.132 arcsec per year in Right Ascension and 0.103 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR2740 star
DSS2 image of HR2740. The red arrow shows the motion of HR2740 during the next 1000 years (-2.20 arcmin in Right Ascension and 1.72 arcmin in declination);

Distance of HR2740 from the Sun and relative movement

HR2740 is distant 69.04 light years from the Sun and it is moving towards the Sun at the speed of 1 kilometers per second.

21.18 pc
69.04 ly
-1 km/s
-0.132 arcsec/year
0.103 arcsec/year

Spectral properties of HR2740

HR2740 belongs to spectral class F0 and has a luminosity class of IV corresponding to a hypergiant star.

2.86
F0IV
7337K

The red dot in the diagram below shows where HR2740 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR2740. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR2740

SAO218537
SAO218537
Gl 268.1