HR1840

Above the horizon. Rise: 14:18 | Tran: 19:39 | Set: 1:03

Alt: 17.70° Az: 128.21° Direction: South-East

HR1840 is a sub-giant star of spectral class B2 in the constellation of Orion.

HR1840 visual magnitude is 6.33. Because of its faintness, HR1840 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 HR1840. The red arrow shows the motion of HR1840 during the next 10000 years (-2.17 arcmin in Right Ascension and 0.17 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 05h 31m 33s

Declination -07° 25’ 01”

Hour Angle 20h 43m 56s

Sidereal Time 02h 15m 29s

J2000

Right Ascension 05h 30m 20s

Declination -07° 26’ 04”

Galactic Coordinates

Galactic Longitude 210.38°

Galactic Latitude -21.39°

Finder Chart

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Finder chart for HR1840.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.33

Class Sub-giant

Absolute magnitude -1.53

Spectral Type B2IV

Color Index (B-V) -0.19

Temperature 13348K

The red dot in the diagram below shows where HR1840 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR1840. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

HR1840 is distant 1,216.42 light years from the Sun and it is moving far from the Sun at the speed of 11 kilometers per second.

Distance (parsec) 373.13

Distance (light year) 1,216.42

Radial Speed 11 km/s

Proper Motion RA -0.013 arcsec/y

Proper Motion Dec 0.001"/y

Alternative Designations

Henry Draper Catalogue HD36285

SAO Catalogue SAO132192

Hipparcos Catalogue HIP25786

Durchmusterung Catalogue BD-07 1099

Visibility from Your Location

Today's HR1840 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 97.4° RISE 14:18

Max altitude: 31.1° TRANSIT 19:39

Azimuth: 262.6° SET 1:03

Set Location

Other stars in Orion