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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
north SunriseRise: 7:44  
clear_day Transit: 11:48  
SunsetSet: 15:51 south
sunny DaytimeWhat's Visible Now?
All Constellations » Ophiuchus » 


Altitude: 22.5°   Azimuth: 196.9°   Direction: South-South-West

HR6404 is a double giant star in the constellation of Ophiuchus.

HR6404 visual magnitude is 5.99. Because of its reltive faintness, HR6404 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 HR6404:


HR6404 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 22.5°
Azimuth: 196.9°
Direction: South-South-West

Celestial coordinates and finder chart of HR6404

HR6404 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 HR6404 are provided in the following table:

17h 15m 20s
-14° 35’ 02”

The simplified sky map below shows the position of HR6404 in the sky:

Finder chart HR6404 star
Simplified finder chart for HR6404.

Visibility of HR6404 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 HR6404 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: 104.6°
Max altitude: 23.9°
Azimuth: 255.4°

Digitized Sky Survey image of HR6404

The image below is a photograph of HR6404 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 HR6404 is -0.012 arcsec per year in Right Ascension and -0.001 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR6404 star
DSS2 image of HR6404. The red arrow shows the motion of HR6404 during the next 10000 years (-2.00 arcmin in Right Ascension and -0.17 arcmin in declination);

Distance of HR6404 from the Sun and relative movement

HR6404 is distant 306.68 light years from the Sun and it is moving towards the Sun at the speed of 3 kilometers per second.

94.07 pc
306.68 ly
-3 km/s
-0.012 arcsec/year
-0.001 arcsec/year

Spectral properties of HR6404

HR6404 belongs to spectral class K1 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR6404 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR6404. Attribution: Richard Powell / CC BY-SA

HR6404 star system properties

HR6404 is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the HR6404 double sysyem:

4.2 arcsec

Alternative designations of HR6404