Delta Scuti

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δ Scuti
Observation data
Epoch J2000.0
Constellation
(pronunciation)
Scutum
Right ascension 18h 42m 16.4s
Declination -09° 03' 09"
Apparent magnitude (V) +4.70
Distance 187 ± 9 ly
(57 ± 3 pc)
Spectral type F2IIIp
Other designations
HR 7020, HD 172748,
SAO 142515, HIP 91726,
ADS 11581, CCDM 18423-0903

Delta Scuti (δ Sct / δ Scuti) is a triple star system in the constellation Scutum. It is approximately 187 light years from Earth.

Delta Scuti is also the prototype of the Delta Scuti type variable stars. The primary component of the star system, properly called Delta Scuti A, is a yellow-white F-type giant. It pulsates regularly with a period of 4.65 hours which results fluctuations in brightness from magnitude +4.60 to magnitude +4.79. It has two companion stars, the +12.2 magnitude Delta Scuti B, which is 15.2 arcseconds from the primary, and the +9.2 magnitude Delta Scuti C, which is 53 arcseconds away.