Sagitta
Sagitta is a dim but distinctive constellation in the northern sky. Its name is Latin for 'arrow', not to be confused with the significantly larger constellation Sagittarius 'the archer'. It was included among the 48 constellations listed by the 2nd-century astronomer Ptolemy, and it remains one of the 88 modern constellations defined by the International Astronomical Union. Although it dates to antiquity, Sagitta has no star brighter than 3rd magnitude and has the third-smallest area of any constellation.

Gamma Sagittae is the constellation's brightest star, with an apparent magnitude of 3.47. It is an ageing red giant star 90% as massive as the Sun that has cooled and expanded to a diameter 54 times greater than it. Delta, Epsilon, Zeta, and Theta Sagittae are each multiple stars whose components can be seen in small telescopes. V Sagittae is a cataclysmic variable—a binary star system composed of a white dwarf accreting mass of a donor star that is expected to go nova and briefly become the most luminous star in the Milky Way and one of the brightest stars in our sky around the year 2083. Two star systems in Sagitta have Jupiter-like planets, while a third—15 Sagittae—has a brown dwarf companion.
Q8928
constellation
Concept
Q397
Latin
Concept
Q8866
Sagittarius
CEL
Q34943
Ptolemy
PER
Q9241
88 modern constellations
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Q6867
International Astronomical Union
ORG
Q124313
magnitude
Concept
Q2777655
Gamma Sagittae
CEL
Q50081
red giant
Concept
Q5177587
Delta
CEL
Q5177589
Epsilon
CEL
Q5177598
Zeta
CEL
Q5177594
Theta Sagittae
CEL
Q595871
multiple
Concept
Q56303735
V Sagittae
CEL
Q1059564
cataclysmic variable
Concept
Q50053
binary star system
Concept
Q5871
white dwarf
Concept
Q6458
nova
Concept
Q105902
luminous
Concept
Q321
Milky Way
Concept
Q194349
15 Sagittae
CEL
Q101600
brown dwarf
Concept
Q10513
Sagitta
CEL
Q10513
Sagitta
CEL
Q10513
Sagitta
CEL
Q10513
Sagitta
CEL
Q10513
Sagitta
CEL
Q10513
Sagitta
CEL
Q10513
Sagitta
CEL
2083-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2083
DATE
+48^^http://www.w3.org/2001/XMLSchema#decimal
48
NUMBER
+2^^http://www.w3.org/2001/XMLSchema#decimal
2
NUMBER
+88^^http://www.w3.org/2001/XMLSchema#decimal
88
NUMBER
+3^^http://www.w3.org/2001/XMLSchema#decimal
3
NUMBER
+3.47^^http://www.w3.org/2001/XMLSchema#decimal
3.47
NUMBER
+90^^http://www.w3.org/2001/XMLSchema#decimal
90
NUMBER
+54^^http://www.w3.org/2001/XMLSchema#decimal
54
NUMBER
+15^^http://www.w3.org/2001/XMLSchema#decimal
15
NUMBER
instance of
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apparent magnitude
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