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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: 6:44  
clear_day Transit: 12:10  
SunsetSet: 17:38
sleep NighttimeWhat's Visible Now?
All Constellations » Leo Minor » 


Altitude: 44.1°   Azimuth: 92.4°   Direction: East

HR4184 is a variable and double giant star in the constellation of Leo Minor.

HR4184 visual magnitude is 6.02. Because of its reltive faintness, HR4184 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 HR4184 is 0.008 arcsec per year in Right Ascension and -0.021 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR4184 star
DSS2 image of HR4184. The red arrow shows the motion of HR4184 during the next 10000 years (1.33 arcmin in Right Ascension and -3.50 arcmin in declination);

Key facts about HR4184


HR4184 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 44.1°
Azimuth: 92.4°
Direction: East

Celestial coordinates and finder chart of HR4184

HR4184 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 HR4184 are provided in the following table:

10h 42m 11s
+31° 41’ 48”
Leo Minor

The simplified sky map below shows the position of HR4184 in the sky:

Finder chart HR4184 star
Simplified finder chart for HR4184.

Visibility of HR4184 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 HR4184 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: 58.3°
Max altitude: 70.2°
Azimuth: 301.7°

Distance of HR4184 from the Sun and relative movement

HR4184 is distant 742.60 light years from the Sun and it is moving far from the Sun at the speed of 16 kilometers per second.

227.79 pc
742.60 ly
16 km/s
0.008 arcsec/year
-0.021 arcsec/year

Spectral properties of HR4184

HR4184 belongs to spectral class M4 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR4184 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR4184. Attribution: Richard Powell / CC BY-SA

HR4184 star system properties

HR4184 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 HR4184 double sysyem:

112.5 arcsec

Alternative designations of HR4184