HR1172

HR1172 is a variable and double main-sequence star in the constellation of Taurus.

HR1172 visual magnitude is 5.45. Because of its reltive faintness, HR1172 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 HR1172:

Color of HR1172 ⬤

Magnitude of HR1172 5.45

Class Main-sequence

VISIBILITY RIGHT NOW HR1172 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of HR1172

HR1172 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 HR1172 are provided in the following table:

Right Ascension J2000 03h 48m 20s

Declination J2000 +23° 25’ 15”

Galactic Longitude 167.33°

Galactic Latitude -23.83°

Constellation Taurus

The simplified sky map below shows the position of HR1172 in the sky:

Simplified finder chart for HR1172.

Visibility of HR1172 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 HR1172 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: 66.6° RISE 4:08

Max altitude: 61.9° TRANSIT 12:17

Azimuth: 293.4° SET 20:26

RIGHT NOW HR1172 is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR1172

The image below is a photograph of HR1172 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 HR1172 is 0.023 arcsec per year in Right Ascension and -0.05 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR1172. The red arrow shows the motion of HR1172 during the next 10000 years (3.83 arcmin in Right Ascension and -8.33 arcmin in declination);

Distance of HR1172 from the Sun and relative movement

HR1172 is distant 338.17 light years from the Sun and it is moving far from the Sun at the speed of 4 kilometers per second.

Distance (parsec) 103.73 pc

Distance (light year) 338.17 ly

Heliocentric radial velocity 4 km/s

Proper Motion RA 0.023 arcsec/year

Proper Motion Dec -0.05 arcsec/year

Spectral properties of HR1172

HR1172 belongs to spectral class B8 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude 0.37

Spectral Type B8V

Color Index (B-V) -0.07

Temperature of HR1172 11092K

The red dot in the diagram below shows where HR1172 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR1172. Attribution: Richard Powell / CC BY-SA

HR1172 star system properties

HR1172 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 HR1172 double sysyem:

Main star magnitude 5.45

Secondary star magnitude 7.45

Magnitude difference 2

Separation 0.1 arcsec

Alternative designations of HR1172

Henry Draper Catalogue HD23753

SAO Catalogue SAO76215

Hipparcos Catalogue HIP17776

Durchmusterung Catalogue BD+22 563

General Catalogue of Variable Stars 1321

In Evidence

Other stars in Taurus