Spring Triangle

<p>The Spring Triangle is an <a href="/facts/Asterism_(astronomy)/CFu0Qllg">astronomical asterism</a> involving an imaginary triangle drawn upon the <a href="/facts/Celestial_sphere/TYAtXgor">celestial sphere</a>, with its defining vertices at <a href="/facts/Arcturus/8W0qslPJ">Arcturus</a>, <a href="/facts/Spica/bqWfSvp5">Spica</a>, and <a href="/facts/Regulus/3Dw39x28">Regulus</a>. This triangle connects the <a href="/facts/Constellation/nBQqgW8A">constellations</a> of <a href="/facts/Bo%C3%B6tes/B74JhFQm">Boötes</a>, <a href="/facts/Virgo_(constellation)/4bcIqNfd">Virgo</a>, and <a href="/facts/Leo_(constellation)/B4knjuxd">Leo</a>. It is visible in the evening rising in the southeastern sky of the <a href="/facts/Northern_hemisphere/EFwyqL25">Northern Hemisphere</a> between March and May and setting until August, while at morning rising and setting from November to the end of February.
</p><p><a href="/facts/George_Lovi/G1N13FN6">George Lovi</a> of <a href="/facts/Sky_%26_Telescope/DSltKDCk">Sky & Telescope</a> magazine had a slightly different Spring Triangle, including the tail of Leo, with <a href="/facts/Denebola/WIlAPp7f">Denebola</a> replacing <a href="/facts/Regulus/3Dw39x28">Regulus</a>. Although Denebola is dimmer, this triangle is more nearly equilateral.  These stars, together with <a href="/facts/Cor_Caroli/pI4X6akf">Cor Caroli</a>, form parts of a larger spring asterism called the <a href="/facts/Great_Diamond/BUGoK7cw">Great Diamond</a>.
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Spring Triangle open-in-new

Spring Triangle