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: 7:02  
clear_day Transit: 12:47  
SunsetSet: 18:32 south
sunny DaytimeWhat's Visible Now
All Constellations » Gemini » 


Altitude: 71.3°   Azimuth: 164.6°   Direction: South-South-East

HR3040 is a variable and double main-sequence star in the constellation of Gemini.

HR3040 visual magnitude is 6.03. Because of its reltive faintness, HR3040 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 HR3040:


HR3040 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 71.3°
Azimuth: 164.6°
Direction: South-South-East

Celestial coordinates and finder chart of HR3040

HR3040 is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR3040 are provided in the following table:

07h 51m 02s
+33° 14’ 00”

The simplified sky map below shows the position of HR3040 in the sky:

Finder chart HR3040 star
Simplified finder chart for HR3040.

Visibility of HR3040 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 HR3040 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: 56.8°
Max altitude: 71.8°
Azimuth: 303.2°

Digitized Sky Survey image of HR3040

The image below is a photograph of HR3040 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 HR3040 is -0.017 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 HR3040 star
DSS2 image of HR3040. The red arrow shows the motion of HR3040 during the next 10000 years (-2.83 arcmin in Right Ascension and 0.17 arcmin in declination);

Distance of HR3040 from the Sun and relative movement

HR3040 is distant 207.78 light years from the Sun and it is moving towards the Sun at the speed of 10 kilometers per second.

63.73 pc
207.78 ly
-10 km/s
-0.017 arcsec/year
0.001 arcsec/year

Spectral properties of HR3040

HR3040 belongs to spectral class A2 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR3040 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR3040. Attribution: Richard Powell / CC BY-SA

HR3040 star system properties

HR3040 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 HR3040 double sysyem:

77.8 arcsec

Alternative designations of HR3040