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: 6:47  
clear_day Transit: 12:50  
SunsetSet: 18:52 south
sunny DaytimeWhat's Visible Now
All Constellations » Orion » 


Altitude: -32.3°   Azimuth: 347.0°   Direction: North-North-West

HR1578 is a hypergiant star in the constellation of Orion.

HR1578 visual magnitude is 6.5. Because of its reltive faintness, HR1578 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 HR1578:


HR1578 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -32.3°
Azimuth: 347.0°
Direction: North-North-West

Celestial coordinates and finder chart of HR1578

HR1578 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 HR1578 are provided in the following table:

04h 55m 58s
+05° 23’ 57”

The simplified sky map below shows the position of HR1578 in the sky:

Finder chart HR1578 star
Simplified finder chart for HR1578.

Visibility of HR1578 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 HR1578 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: 84.6°
Max altitude: 43.9°
Azimuth: 275.4°

Digitized Sky Survey image of HR1578

The image below is a photograph of HR1578 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 HR1578 is -0.004 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 HR1578 star
DSS2 image of HR1578. The red arrow shows the motion of HR1578 during the next 100000 years (-6.67 arcmin in Right Ascension and -15.00 arcmin in declination);

Distance of HR1578 from the Sun and relative movement

HR1578 is distant 489.49 light years from the Sun and it is moving far from the Sun at the speed of 22 kilometers per second.

150.15 pc
489.49 ly
22 km/s
-0.004 arcsec/year
-0.009 arcsec/year

Spectral properties of HR1578

HR1578 belongs to spectral class A0 and has a luminosity class of V corresponding to a hypergiant star.


The red dot in the diagram below shows where HR1578 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR1578. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR1578