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🌎  Greenwich, United Kingdom [change]


HR1861 is a variable and double sub-giant star in the constellation of Orion.

HR1861 visual magnitude is 5.35. Because of its reltive faintness, HR1861 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 HR1861:

HR1861 is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of HR1861

HR1861 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 HR1861 are provided in the following table:

05h 32m 41s
-01° 35’ 30”

The simplified sky map below shows the position of HR1861 in the sky:

Finder chart HR1861 star
Simplified finder chart for HR1861.

Visibility of HR1861 from your location

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's HR1861 rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 91.6°
Max altitude: 36.9°
Azimuth: 268.4°
HR1861 is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR1861

The image below is a photograph of HR1861 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 HR1861 is -0.001 arcsec per year in Right Ascension and -0.009 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of HR1861 star
DSS2 image of HR1861. The red arrow shows the motion of HR1861 during the next 100000 years (-1.67 arcmin in Right Ascension and -15.00 arcmin in declination);

Distance of HR1861 from the Sun and relative movement

HR1861 is distant 2,566.93 light years from the Sun and it is moving far from the Sun at the speed of 34 kilometers per second.

787.40 pc
2,566.93 ly
34 km/s
-0.001 arcsec/year
-0.009 arcsec/year

Spectral properties of HR1861

HR1861 belongs to spectral class B1 and has a luminosity class of IV corresponding to a sub-giant star.


The red dot in the diagram below shows where HR1861 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR1861. Attribution: Richard Powell / CC BY-SA

HR1861 star system properties

HR1861 is a visual double star which can be observed with the help of medium or large telescopes. The table below shows key information about the HR1861 double sysyem:

2 arcsec

Alternative designations of HR1861