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: 4:46  
clear_day Transit: 12:57  
SunsetSet: 21:08 south
wb_twilight Astronomical TwilightWhat's Visible Now
All Constellations » Crater » 


Altitude: -10.0°   Azimuth: 259.2°   Direction: West

HR4490 is a double main-sequence star in the constellation of Crater.

HR4490 visual magnitude is 6.21. Because of its reltive faintness, HR4490 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 HR4490:


HR4490 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -10.0°
Azimuth: 259.2°
Direction: West

Celestial coordinates and finder chart of HR4490

HR4490 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 HR4490 are provided in the following table:

11h 39m 51s
-14° 28’ 06”

The simplified sky map below shows the position of HR4490 in the sky:

Finder chart HR4490 star
Simplified finder chart for HR4490.

Visibility of HR4490 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 HR4490 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: 104.5°
Max altitude: 24.1°
Azimuth: 255.5°
HR4490 is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR4490

The image below is a photograph of HR4490 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 HR4490 is -0.038 arcsec per year in Right Ascension and -0.011 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR4490 star
DSS2 image of HR4490. The red arrow shows the motion of HR4490 during the next 10000 years (-6.33 arcmin in Right Ascension and -1.83 arcmin in declination);

Distance of HR4490 from the Sun and relative movement

HR4490 is distant 597.07 light years from the Sun and it is moving far from the Sun at the speed of 5 kilometers per second.

183.15 pc
597.07 ly
5 km/s
-0.038 arcsec/year
-0.011 arcsec/year

Spectral properties of HR4490

HR4490 belongs to spectral class A1 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR4490 is situated in the HertzsprungÔÇôRussell diagram.

HR Diagram
H-R diagram showing the position of HR4490. Attribution: Richard Powell / CC BY-SA

HR4490 star system properties

HR4490 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 HR4490 double sysyem:

7.8 arcsec

Alternative designations of HR4490