Asteroseismic potential of CHEOPS | Astronomy & Astrophysics (A&A)

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Table 1.

Comparison among different past, current, and future space missions with asteroseismic capabilities.

	MOST	CoRoT	Kepler		BRITE	TESS	CHEOPS

			Kepler	K2

Mission years	≥13	6.5	4	≥4	≥4	≥2	≥3.5
Telescope aperture (cm)	15	27	95		5 × 3	4 × 10.5	32
Orbit	Geocentric	Geocentric	Earth-trailing		Geocentric	High Earth	Geocentric
	polar	polar	heliocentric		low Earth	elliptical	sun-synchronous

Duty cycle (in %)	Variable	>90	>95		Variable	>95	[60, 100]
Cadence	< 1 min	32/512 s	59 s/29 min		1 s	20 s/2/30 min	60 s
Pointing freedom	Free	Several fixed FOVs	Fixed FOV	Free	Ecliptic plane	All sky monitoring	Free
Sky coverage (in square degrees)	PIT^b	< 600	100	≈ 80% ecliptic plane	PIT^b	Almost full^a	PIT^b

Notes.

^(a)

Weak coverage for Dec in the range [−6°,6°].

^(b)

PIT = pointing individual targets.

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