HR7230

Altitude: 7.8° Azimuth: 232.5° Direction: South-West

HR7230 is a variable and double main-sequence star in the constellation of Sagittarius.

HR7230 visual magnitude is 5.97. Because of its reltive faintness, HR7230 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 HR7230:

Color of HR7230 ⬤

Magnitude of HR7230 5.97

Class Main-sequence

VISIBILITY RIGHT NOW

HR7230 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 7.8°
Azimuth: 232.5°
Direction: South-West

Celestial coordinates and finder chart of HR7230

HR7230 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 HR7230 are provided in the following table:

Right Ascension J2000 19h 05m 41s

Declination J2000 -15° 39’ 37”

Galactic Longitude 20.44°

Galactic Latitude -10.16°

Constellation Sagittarius

The simplified sky map below shows the position of HR7230 in the sky:

Simplified finder chart for HR7230.

Visibility of HR7230 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 HR7230 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: 105.7° RISE 9:29

Max altitude: 22.9° TRANSIT 14:05

Azimuth: 254.3° SET 18:41

Digitized Sky Survey image of HR7230

The image below is a photograph of HR7230 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 HR7230 is 0.003 arcsec per year in Right Ascension and -0.007 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

DSS2 image of HR7230. The red arrow shows the motion of HR7230 during the next 100000 years (5.00 arcmin in Right Ascension and -11.67 arcmin in declination);

Distance of HR7230 from the Sun and relative movement

HR7230 is distant 869.33 light years from the Sun and it is moving towards the Sun at the speed of 26 kilometers per second.

Distance (parsec) 266.67 pc

Distance (light year) 869.33 ly

Heliocentric radial velocity -26 km/s

Proper Motion RA 0.003 arcsec/year

Proper Motion Dec -0.007 arcsec/year

Spectral properties of HR7230

HR7230 belongs to spectral class B9 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude -1.16

Spectral Type B9V

Color Index (B-V) -0.02

Temperature of HR7230 10382K

The red dot in the diagram below shows where HR7230 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7230. Attribution: Richard Powell / CC BY-SA

HR7230 star system properties

HR7230 is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the HR7230 double sysyem:

Main star magnitude 5.97

Secondary star magnitude 12.17

Magnitude difference 6.2

Separation 46.9 arcsec

Alternative designations of HR7230

Henry Draper Catalogue HD177517

SAO Catalogue SAO162177

Hipparcos Catalogue HIP93763

Durchmusterung Catalogue BD-15 5223

FK5 Catalogue 3522

General Catalogue of Variable Stars Var?

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