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: 6:59  
clear_day Transit: 12:48  
SunsetSet: 18:36 south
sunny DaytimeWhat's Visible Now
All Constellations » Hydra » 


Altitude: 8.8°   Azimuth: 222.4°   Direction: South-West

HR3822 is a double main-sequence star in the constellation of Hydra.

HR3822 visual magnitude is 6.31. Because of its reltive faintness, HR3822 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 HR3822:


HR3822 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 8.8°
Azimuth: 222.4°
Direction: South-West

Celestial coordinates and finder chart of HR3822

HR3822 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 HR3822 are provided in the following table:

09h 35m 33s
-19° 35’ 00”

The simplified sky map below shows the position of HR3822 in the sky:

Finder chart HR3822 star
Simplified finder chart for HR3822.

Visibility of HR3822 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 HR3822 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: 109.6°
Max altitude: 18.9°
Azimuth: 250.4°

Digitized Sky Survey image of HR3822

The image below is a photograph of HR3822 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 HR3822 is -0.038 arcsec per year in Right Ascension and -0.046 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR3822 star
DSS2 image of HR3822. The red arrow shows the motion of HR3822 during the next 10000 years (-6.33 arcmin in Right Ascension and -7.67 arcmin in declination);

Distance of HR3822 from the Sun and relative movement

HR3822 is distant 283.48 light years from the Sun and it is moving far from the Sun at the speed of 16 kilometers per second.

86.96 pc
283.48 ly
16 km/s
-0.038 arcsec/year
-0.046 arcsec/year

Spectral properties of HR3822

HR3822 belongs to spectral class A2 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR3822 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR3822. Attribution: Richard Powell / CC BY-SA

HR3822 star system properties

HR3822 is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the HR3822 double sysyem:

51.5 arcsec

Alternative designations of HR3822