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 » Cetus » 


Altitude: -29.6°   Azimuth: 299.4°   Direction: West-North-West

HR404 is a double main-sequence star in the constellation of Cetus.

HR404 visual magnitude is 5.91. Because of its reltive faintness, HR404 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 HR404:


HR404 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -29.6°
Azimuth: 299.4°
Direction: West-North-West

Celestial coordinates and finder chart of HR404

HR404 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 HR404 are provided in the following table:

01h 24m 20s
-06° 54’ 52”

The simplified sky map below shows the position of HR404 in the sky:

Finder chart HR404 star
Simplified finder chart for HR404.

Visibility of HR404 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 HR404 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: 96.9°
Max altitude: 31.6°
Azimuth: 263.1°

Digitized Sky Survey image of HR404

The image below is a photograph of HR404 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 HR404 is 0.042 arcsec per year in Right Ascension and 0.003 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR404 star
DSS2 image of HR404. The red arrow shows the motion of HR404 during the next 10000 years (7.00 arcmin in Right Ascension and 0.50 arcmin in declination);

Distance of HR404 from the Sun and relative movement

HR404 is distant 145.99 light years from the Sun and it is moving far from the Sun at the speed of 32 kilometers per second.

44.78 pc
145.99 ly
32 km/s
0.042 arcsec/year
0.003 arcsec/year

Spectral properties of HR404

HR404 belongs to spectral class F3 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR404 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR404. Attribution: Richard Powell / CC BY-SA

HR404 star system properties

HR404 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 HR404 double sysyem:

0.2 arcsec

Alternative designations of HR404