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: 6:49  
clear_day Transit: 12:50  
SunsetSet: 18:50 south
sleep NighttimeWhat's Visible Now
All Constellations » Hydra » 


Altitude: -37.5°   Azimuth: 51.9°   Direction: North-East

HR3724 is a variable and multiple star in the constellation of Hydra.

HR3724 visual magnitude is 6.53. Because of its reltive faintness, HR3724 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 HR3724:


HR3724 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -37.5°
Azimuth: 51.9°
Direction: North-East

Celestial coordinates and finder chart of HR3724

HR3724 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 HR3724 are provided in the following table:

09h 22m 50s
-09° 50’ 20”

The simplified sky map below shows the position of HR3724 in the sky:

Finder chart HR3724 star
Simplified finder chart for HR3724.

Visibility of HR3724 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 HR3724 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: 99.8°
Max altitude: 28.7°
Azimuth: 260.2°

Digitized Sky Survey image of HR3724

The image below is a photograph of HR3724 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 HR3724 is -0.027 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 HR3724 star
DSS2 image of HR3724. The red arrow shows the motion of HR3724 during the next 10000 years (-4.50 arcmin in Right Ascension and -3.50 arcmin in declination);

Distance of HR3724 from the Sun and relative movement

HR3724 is distant 452.78 light years from the Sun and it is moving far from the Sun at the speed of 23 kilometers per second.

138.89 pc
452.78 ly
23 km/s
-0.027 arcsec/year
-0.021 arcsec/year

Spectral properties of HR3724

HR3724 belongs to spectral class A5 HR3724 is also a SrCrEu chemically peculiar star.


The red dot in the diagram below shows where HR3724 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR3724. Attribution: Richard Powell / CC BY-SA

HR3724 star system properties

HR3724 is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the HR3724 double sysyem:

0.1 arcsec

Alternative designations of HR3724