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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
north SunriseRise: 7:44  
clear_day Transit: 11:48  
SunsetSet: 15:51 south
wb_twilight Civil TwilightWhat's Visible Now?
All Constellations » Andromeda » 


Altitude: 2.4°   Azimuth: 348.8°   Direction: North

HR305 is a hypergiant star in the constellation of Andromeda.

HR305 visual magnitude is 6.72. Because of its reltive faintness, HR305 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 HR305:


HR305 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 2.4°
Azimuth: 348.8°
Direction: North

Celestial coordinates and finder chart of HR305

HR305 is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR305 are provided in the following table:

01h 04m 36s
+39° 59’ 27”

The simplified sky map below shows the position of HR305 in the sky:

Finder chart HR305 star
Simplified finder chart for HR305.

Visibility of HR305 from your location

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

HR305 is circumpolar and transits at 20:15 UTC (altitude: 78.5°)

Digitized Sky Survey image of HR305

The image below is a photograph of HR305 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 HR305 is 0.077 arcsec per year in Right Ascension and -0.022 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR305 star
DSS2 image of HR305. The red arrow shows the motion of HR305 during the next 10000 years (12.83 arcmin in Right Ascension and -3.67 arcmin in declination);

Distance of HR305 from the Sun and relative movement

HR305 is distant 275.11 light years from the Sun and it is moving far from the Sun at the speed of 11 kilometers per second.

84.39 pc
275.11 ly
11 km/s
0.077 arcsec/year
-0.022 arcsec/year

Spectral properties of HR305

HR305 belongs to spectral class F0 and has a luminosity class of V corresponding to a hypergiant star.


The red dot in the diagram below shows where HR305 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR305. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR305