Your guide to the Solar System and the night sky
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🌎  Observing from: Greenwich, United Kingdom [change]

HR7540

HR7540 is a hypergiant star in the constellation of Vulpecula.

HR7540 visual magnitude is 5.95. Because of its reltive faintness, HR7540 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 HR7540:

5.95
Hypergiant
HR7540 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 46°.

Celestial coordinates and finder chart of HR7540

HR7540 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 HR7540 are provided in the following table:

19h 47m 48s
+25° 23’ 02”
61.74°
-0.02°
Vulpecula

The simplified sky map below shows the position of HR7540 in the sky:

Finder chart HR7540 star
Simplified finder chart for HR7540.

Visibility of HR7540 from your location

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

Today's HR7540 rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 64.6°
Max altitude: 63.9°
Azimuth: 295.4°
HR7540 is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR7540

The image below is a photograph of HR7540 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 HR7540 is 0.082 arcsec per year in Right Ascension and -0.026 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR7540 star
DSS2 image of HR7540. The red arrow shows the motion of HR7540 during the next 10000 years (13.67 arcmin in Right Ascension and -4.33 arcmin in declination);

Distance of HR7540 from the Sun and relative movement

HR7540 is distant 399.51 light years from the Sun and it is moving towards the Sun at the speed of 18 kilometers per second.

122.55 pc
399.51 ly
-18 km/s
0.082 arcsec/year
-0.026 arcsec/year

Spectral properties of HR7540

HR7540 belongs to spectral class K0 and has a luminosity class of II corresponding to a hypergiant star.

0.51
K0II
4767K

The red dot in the diagram below shows where HR7540 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7540. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR7540

SAO87729
SAO87729