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Ursa Astronomical Association
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Ursa Astronomical Association

Starry sky image - 29.4.2021 at 22.15 Helsinki Observation number 98078

Visibility III / V

Tuomas Salo, Ursa (Helsinki)

I photographed the Star of Spica, the brightest star in the Virgo constellation. It is a bluish contiguous binary star, or rotating ellipsoidal variable, 262 light-years from Earth. It is 1,700 times brighter than the sun.

More similar observations
Additional information
  • Observation target
    • Starry sky image
    • Keskitaso
  • Constellation
    • Virgo
  • Weather
    • Sää oli täysin selkeä.
  • Stars
    • Binary star info

      Binary stars are star systems, where there are two stars close each other. Binary stars are classified to optical or physical binaries.

      In optical binary star systems two stars are apparently close each other, but in reality they are located far each other in different distacies.

      In physical binary systems the stars are bound up with gravity and they are orbiting each other. Stellar systems with more than two stars are called multiple star systems.

      Binary star Albireo in Cygnus in composed of blue and yellow star. It is unknown if this of a physical binary. Image Mauri Korpi.


      M40 eli Winnecke 4 on Messierin luetteloon virheellisesti päätynyt tähtipari. Kyseessä on optinen kaksoistähti. Tähdet eivät siis ole fyysisesti lähekkäin. Kuva Tero Hiekkalinna.

      M40 aka Winnecke 4 is stellar pair incorrectly taken into The Messier catalog. It is an optical binary. Image Tero Hiekkalinna.

Technical information

Camera Nikon D5100. Telescope 9.25 "Celestron. 8-24mm zoom eyepiece. HEQ5 stand.

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