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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: 7:48  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
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All Constellations » Dorado » 


Altitude: -31.3°   Azimuth: 158.7°   Direction: South-South-East

HR2104 is a hypergiant star in the constellation of Dorado.

HR2104 visual magnitude is 6.63. Because of its reltive faintness, HR2104 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 HR2104:


HR2104 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -31.3°
Azimuth: 158.7°
Direction: South-South-East

Celestial coordinates and finder chart of HR2104

HR2104 is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR2104 are provided in the following table:

05h 54m 11s
-64° 28’ 55”

The simplified sky map below shows the position of HR2104 in the sky:

Finder chart HR2104 star
Simplified finder chart for HR2104.

Visibility of HR2104 from your location

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

HR2104 is currently not visible from Greenwich, United Kingdom edit_location_alt

Digitized Sky Survey image of HR2104

The image below is a photograph of HR2104 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 HR2104 is -0.003 arcsec per year in Right Ascension and 0.064 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR2104 star
DSS2 image of HR2104. The red arrow shows the motion of HR2104 during the next 10000 years (-0.50 arcmin in Right Ascension and 10.67 arcmin in declination);

Distance of HR2104 from the Sun and relative movement

HR2104 is distant 419.02 light years from the Sun and it is moving far from the Sun at the speed of 13 kilometers per second.

128.53 pc
419.02 ly
13 km/s
-0.003 arcsec/year
0.064 arcsec/year

Spectral properties of HR2104

HR2104 belongs to spectral class F0 and has a luminosity class of III corresponding to a hypergiant star.


The red dot in the diagram below shows where HR2104 is situated in the HertzsprungÔÇôRussell diagram.

HR Diagram
H-R diagram showing the position of HR2104. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR2104