HR1781

Below the horizon. Rise: 7:50 | Tran: 13:47 | Set: 19:45

Alt: -37.98° Az: 12.62° Direction: North-North-East

HR1781 is a main-sequence star of spectral class B1 in the constellation of Orion.

HR1781 visual magnitude is 5.7. Because of its faintness, HR1781 is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

DSS2 image of HR1781. The red arrow shows the motion of HR1781 during the next 100000 years (-15.00 arcmin in Right Ascension and 5.00 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 05h 25m 00s

Declination -00° 08’ 16”

Hour Angle 12h 39m 40s

Sidereal Time 18h 04m 40s

J2000

Right Ascension 05h 23m 42s

Declination -00° 09’ 34”

Galactic Coordinates

Galactic Longitude 202.68°

Galactic Latitude -19.49°

Finder Chart

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Finder chart for HR1781.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.7

Class Main-sequence

Absolute magnitude -1.27

Spectral Type B1V

Color Index (B-V) -0.21

Temperature 13831K

The red dot in the diagram below shows where HR1781 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR1781. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

HR1781 is distant 808.93 light years from the Sun and it is moving far from the Sun at the speed of 22 kilometers per second.

Distance (parsec) 248.14

Distance (light year) 808.93

Radial Speed 22 km/s

Proper Motion RA -0.009 arcsec/y

Proper Motion Dec 0.003"/y

Alternative Designations

Henry Draper Catalogue HD35299

SAO Catalogue SAO132057

Hipparcos Catalogue HIP25223

Durchmusterung Catalogue BD-00 936

Visibility from Your Location

Today's HR1781 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 90.1° RISE 7:50

Max altitude: 38.4° TRANSIT 13:47

Azimuth: 269.9° SET 19:45

Set Location

Other stars in Orion