HR1900 is a variable and double sub-giant star in the constellation of Orion.
HR1900 visual magnitude is 6.4. Because of its reltive faintness, HR1900 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 HR1900:
Celestial coordinates and finder chart of HR1900
HR1900 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 HR1900 are provided in the following table:
The simplified sky map below shows the position of HR1900 in the sky:
Visibility of HR1900 from your location
Digitized Sky Survey image of HR1900
The image below is a photograph of HR1900 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 HR1900 is -0.008 arcsec per year in Right Ascension and 0 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.
Distance of HR1900 from the Sun and relative movement
HR1900 is distant 2,608.00 light years from the Sun and it is moving far from the Sun at the speed of 24 kilometers per second.
Spectral properties of HR1900
HR1900 belongs to spectral class B3 and has a luminosity class of IV corresponding to a sub-giant star.
The red dot in the diagram below shows where HR1900 is situated in the Hertzsprung–Russell diagram.
HR1900 star system properties
HR1900 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 HR1900 double sysyem: