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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: 7:40  
clear_day Transit: 11:47  
SunsetSet: 15:53 south
sunny DaytimeWhat's Visible Now?
All Constellations » Cetus » 


Altitude: -22.0°   Azimuth: 99.3°   Direction: East

HR730 is a double main-sequence star in the constellation of Cetus.

HR730 visual magnitude is 6.77. Because of its reltive faintness, HR730 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 HR730:


HR730 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -22.0°
Azimuth: 99.3°
Direction: East

Celestial coordinates and finder chart of HR730

HR730 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 HR730 are provided in the following table:

02h 29m 55s
-22° 40’ 58”

The simplified sky map below shows the position of HR730 in the sky:

Finder chart HR730 star
Simplified finder chart for HR730.

Visibility of HR730 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 HR730 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: 112.7°
Max altitude: 15.8°
Azimuth: 247.3°

Digitized Sky Survey image of HR730

The image below is a photograph of HR730 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 HR730 is 0.077 arcsec per year in Right Ascension and 0.006 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR730 star
DSS2 image of HR730. The red arrow shows the motion of HR730 during the next 10000 years (12.83 arcmin in Right Ascension and 1.00 arcmin in declination);

Distance of HR730 from the Sun and relative movement

HR730 is distant 279.59 light years from the Sun and it is moving far from the Sun at the speed of 13 kilometers per second.

85.76 pc
279.59 ly
13 km/s
0.077 arcsec/year
0.006 arcsec/year

Spectral properties of HR730

HR730 belongs to spectral class A9 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR730 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR730. Attribution: Richard Powell / CC BY-SA

HR730 star system properties

HR730 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 HR730 double sysyem:

28.4 arcsec

Alternative designations of HR730