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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: 6:40  
clear_day Transit: 12:10  
SunsetSet: 17:41
sunny DaytimeWhat's Visible Now?
All Constellations » Antlia » 


Altitude: -74.4°   Azimuth: 28.6°   Direction: North-North-East

HR3984 is a hypergiant star in the constellation of Antlia.

HR3984 visual magnitude is 6.36. Because of its reltive faintness, HR3984 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 HR3984 is -0.011 arcsec per year in Right Ascension and 0.003 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR3984 star
DSS2 image of HR3984. The red arrow shows the motion of HR3984 during the next 10000 years (-1.83 arcmin in Right Ascension and 0.50 arcmin in declination);

Key facts about HR3984


HR3984 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -74.4°
Azimuth: 28.6°
Direction: North-North-East

Celestial coordinates and finder chart of HR3984

HR3984 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 HR3984 are provided in the following table:

10h 08m 01s
-37° 20’ 00”

The simplified sky map below shows the position of HR3984 in the sky:

Finder chart HR3984 star
Simplified finder chart for HR3984.

Visibility of HR3984 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 HR3984 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: 127.3°
Max altitude: 1.2°
Azimuth: 232.7°

Distance of HR3984 from the Sun and relative movement

HR3984 is distant 589.51 light years from the Sun and it is moving far from the Sun at the speed of 1 kilometers per second.

180.83 pc
589.51 ly
1 km/s
-0.011 arcsec/year
0.003 arcsec/year

Spectral properties of HR3984

HR3984 belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.


The red dot in the diagram below shows where HR3984 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR3984. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR3984