Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 6:43  
clear_day Transit: 12:51  
SunsetSet: 18:59 south
sunny DaytimeWhat's Visible Now
All Constellations » Orion » 


Altitude: -40.2°   Azimuth: 327.4°   Direction: North-North-West

HR1887 is a double hypergiant star in the constellation of Orion.

HR1887 visual magnitude is 4.78. Because of its moderate brightness, HR1887 should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about HR1887:


HR1887 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -40.2°
Azimuth: 327.4°
Direction: North-North-West

Celestial coordinates and finder chart of HR1887

HR1887 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 HR1887 are provided in the following table:

05h 35m 02s
-06° 00’ 06”

The simplified sky map below shows the position of HR1887 in the sky:

Finder chart HR1887 star
Simplified finder chart for HR1887.

Visibility of HR1887 from your location

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

Today's HR1887 rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 96.0°
Max altitude: 32.5°
Azimuth: 264.0°

Digitized Sky Survey image of HR1887

The image below is a photograph of HR1887 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 HR1887 is 0.004 arcsec per year in Right Ascension and 0.002 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of HR1887 star
DSS2 image of HR1887. The red arrow shows the motion of HR1887 during the next 100000 years (6.67 arcmin in Right Ascension and 3.33 arcmin in declination);

Distance of HR1887 from the Sun and relative movement

HR1887 is distant 1,862.86 light years from the Sun and it is moving far from the Sun at the speed of 28 kilometers per second.

571.43 pc
1,862.86 ly
28 km/s
0.004 arcsec/year
0.002 arcsec/year

Spectral properties of HR1887

HR1887 belongs to spectral class B0 and has a luminosity class of V corresponding to a hypergiant star.


The red dot in the diagram below shows where HR1887 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR1887. Attribution: Richard Powell / CC BY-SA

HR1887 star system properties

HR1887 is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the HR1887 double sysyem:

36.2 arcsec

Alternative designations of HR1887