HR7554

HR7554 is a variable sub-giant star in the constellation of Aquila.

HR7554 visual magnitude is 6.51. Because of its reltive faintness, HR7554 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 HR7554:

Color of HR7554 ⬤

Magnitude of HR7554 6.51

Class Sub-giant

VISIBILITY RIGHT NOW HR7554 is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 44°.

Celestial coordinates and finder chart of HR7554

HR7554 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 HR7554 are provided in the following table:

Right Ascension J2000 19h 50m 17s

Declination J2000 +07° 54’ 08”

Galactic Longitude 46.83°

Galactic Latitude -9.28°

Constellation Aquila

The simplified sky map below shows the position of HR7554 in the sky:

Simplified finder chart for HR7554.

Visibility of HR7554 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 HR7554 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: 82.1° RISE 21:27

Max altitude: 46.4° TRANSIT 4:08

Azimuth: 277.9° SET 10:46

RIGHT NOW HR7554 is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR7554

The image below is a photograph of HR7554 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 HR7554 is 0.005 arcsec per year in Right Ascension and 0.001 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

DSS2 image of HR7554. The red arrow shows the motion of HR7554 during the next 100000 years (8.33 arcmin in Right Ascension and 1.67 arcmin in declination);

Distance of HR7554 from the Sun and relative movement

HR7554 is distant 1,552.38 light years from the Sun and it is moving towards the Sun at the speed of 30 kilometers per second.

Distance (parsec) 476.19 pc

Distance (light year) 1,552.38 ly

Heliocentric radial velocity -30 km/s

Proper Motion RA 0.005 arcsec/year

Proper Motion Dec 0.001 arcsec/year

Spectral properties of HR7554

HR7554 belongs to spectral class B2 and has a luminosity class of IV corresponding to a sub-giant star.

Absolute magnitude -1.88

Spectral Type B2IV

Color Index (B-V) -0.1

Temperature of HR7554 11573K

The red dot in the diagram below shows where HR7554 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7554. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR7554

Henry Draper Catalogue HD187567

SAO Catalogue SAO125116

Hipparcos Catalogue HIP97607

Durchmusterung Catalogue BD+07 4252

General Catalogue of Variable Stars V1339 Aql

In Evidence

Other stars in Aquila