Your guide to the Solar System and the night sky
✖ By donating now you help keep this site alive and free from ads. Please consider supporting this project.
🌎  Observing from: Greenwich, United Kingdom [change]
🌅 Sunrise: 6:36  ☀️ Transit: 13:02  🌅 Sunset: 19:29

How to support us

You won't see any ads here. If you find this website useful, please consider a donation to help cover the costs of the infrastructure needed to run this website. Thank you!

In Evidence

Best Places to See the 2024 American Eclipse Based on Historical Weather Data
Using historical cloud coverage data we suggest the locations that could provide the better chances to have clear skies on April 8, 2024 to observe the eclipse. Read more...
February 17, 2023
Where to See the Solar Eclipse of April 20 2023
Detailed information about how to observe the hybrid solar eclipse that will be visible on April 20 2023. Read more...
February 12, 2023

Other deep sky objects in Ursa Major

Messier 40 - Double Star in Ursa Major

Messier 40 is a Double Star in the Ursa Major constellation. Messier 40 is situated north of the celestial equator and, as such, it is more easily visible from the northern hemisphere.

Messier 40
Double Star
Ursa Major
  • Messier 40 is above the horizon from Greenwich, United Kingdom [change]. Its current altitude is 26° above the horizon. See also rise and set times.
  • Given its visual magnitude of 8, Messier 40 is visible with the help of a binocular with a 40-50mm aperture or a small telescope.
Available Resources for Messier 40 - Double Star in Ursa Major

Photometric information of Messier 40

The following table lists the magnitude of Messier 40 in different bands of the electomagnetic spectrum (when available), from the B band (445nm wavelength, corresponding to the Blue color), to the V band ( 551nm wavelength, corresponding to Green/Yellow color), to the J, H, K bands (corresponding to 1220nm, 1630nm, 2190nm wavelengths respectively, which are colors not visible to the human eye).

8

For more information about photometry in astronomy, check the photometric system article on Wikipedia.

Digitized Sky Survey image of Messier 40

The image below is a photograph of Messier 40 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).

Image of Messier 40 - Double Star in Ursa Major star
/>
DSS2 image of Messier 40 in the Red band.

Celestial coordinates and finder chart of Messier 40

Celestial coordinates for the J2000 equinox of Messier 40 are provided in the following table:

12h 22m 15s
+58° 05’ 03”

The simplified sky charts below show the position of Messier 40 in the sky. The first chart has a field of view of 60° while the second one has a field of view of 10°.

Finder chart Messier 40 - Double Star in Ursa Major star
Simplified finder chart for Messier 40 - Double Star in Ursa Major.

Finder chart Messier 40 - Double Star in Ursa Major star
Simplified finder chart for Messier 40 - Double Star in Ursa Major.

Rise ans set times of Messier 40 from your location

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Messier 40 - Double Star in Ursa Major is circumpolar and transits at 23:41 UTC (altitude: 83.4°)