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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: 6:42  
clear_day Transit: 12:10  
SunsetSet: 17:40
sleep NighttimeWhat's Visible Now?
All Constellations » Antlia » 


Altitude: 11.9°   Azimuth: 180.1°   Direction: South

HR3770 is a double giant star in the constellation of Antlia.

HR3770 visual magnitude is 5.48. Because of its reltive faintness, HR3770 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 HR3770 is -0.022 arcsec per year in Right Ascension and 0.002 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR3770 star
DSS2 image of HR3770. The red arrow shows the motion of HR3770 during the next 10000 years (-3.67 arcmin in Right Ascension and 0.33 arcmin in declination);

Key facts about HR3770


HR3770 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 11.9°
Azimuth: 180.1°
Direction: South

Celestial coordinates and finder chart of HR3770

HR3770 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 HR3770 are provided in the following table:

09h 29m 54s
-26° 35’ 22”

The simplified sky map below shows the position of HR3770 in the sky:

Finder chart HR3770 star
Simplified finder chart for HR3770.

Visibility of HR3770 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 HR3770 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: 116.6°
Max altitude: 11.9°
Azimuth: 243.4°

Distance of HR3770 from the Sun and relative movement

HR3770 is distant 763.47 light years from the Sun and it is moving far from the Sun at the speed of 12 kilometers per second.

234.19 pc
763.47 ly
12 km/s
-0.022 arcsec/year
0.002 arcsec/year

Spectral properties of HR3770

HR3770 belongs to spectral class K3 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR3770 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR3770. Attribution: Richard Powell / CC BY-SA

HR3770 star system properties

HR3770 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 HR3770 double sysyem:

11.6 arcsec

Alternative designations of HR3770