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🌎  Greenwich, United Kingdom [change]


HR1778 is a double giant star in the constellation of Orion.

HR1778 visual magnitude is 5.9. Because of its reltive faintness, HR1778 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 HR1778:

HR1778 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 30°.

Celestial coordinates and finder chart of HR1778

HR1778 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 HR1778 are provided in the following table:

05h 23m 18s
-08° 24’ 56”

The simplified sky map below shows the position of HR1778 in the sky:

Finder chart HR1778 star
Simplified finder chart for HR1778.

Visibility of HR1778 from your location

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

Today's HR1778 rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 98.4°
Max altitude: 30.1°
Azimuth: 261.6°
HR1778 is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR1778

The image below is a photograph of HR1778 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 HR1778 is 0.003 arcsec per year in Right Ascension and -0.016 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR1778 star
DSS2 image of HR1778. The red arrow shows the motion of HR1778 during the next 10000 years (0.50 arcmin in Right Ascension and -2.67 arcmin in declination);

Distance of HR1778 from the Sun and relative movement

HR1778 is distant 493.19 light years from the Sun and it is moving far from the Sun at the speed of 15 kilometers per second.

151.29 pc
493.19 ly
15 km/s
0.003 arcsec/year
-0.016 arcsec/year

Spectral properties of HR1778

HR1778 belongs to spectral class B8 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR1778 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR1778. Attribution: Richard Powell / CC BY-SA

HR1778 star system properties

HR1778 is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the HR1778 double sysyem:

6 arcsec

Alternative designations of HR1778