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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 6:04  
clear_day Transit: 12:06  
SunsetSet: 18:09
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All Constellations » Orion » 

HR1778

Altitude: -7.6°   Azimuth: 93.9°   Direction: East

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 skies, while it is not visible at all from skies affected by light pollution.

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);

Key facts about HR1778

5.9
Giant

HR1778 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -7.6°
Azimuth: 93.9°
Direction: East

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”
210.5°
-23.39°
Orion

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 edit_location_alt
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 edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 98.4°
Max altitude: 30.1°
Azimuth: 261.6°

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.

0.00
B8III
10516K

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:

5.9
7.6
1.7
6 arcsec

Alternative designations of HR1778

SAO132053
SAO132053