HR1840 is a sub-giant star in the constellation of Orion.
HR1840 visual magnitude is 6.33. Because of its reltive faintness, HR1840 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 HR1840:
Celestial coordinates and finder chart of HR1840
HR1840 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 HR1840 are provided in the following table:
The simplified sky map below shows the position of HR1840 in the sky:
Visibility of HR1840 from your location
Digitized Sky Survey image of HR1840
The image below is a photograph of HR1840 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 HR1840 is -0.013 arcsec per year in Right Ascension and 0.001 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.
Distance of HR1840 from the Sun and relative movement
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.
Spectral properties of HR1840
HR1840 belongs to spectral class B2 and has a luminosity class of IV corresponding to a sub-giant star.
The red dot in the diagram below shows where HR1840 is situated in the Hertzsprung–Russell diagram.