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skyandtelescope.com • AUGUST 2019 77IN THE KEYHOLE
José Joaquín Pérez
Deep in the middle of
NGC 3372, the Carina
Nebula, lies the variable
star system Eta Carinae
(center). North is toward
the top right.
DETAILS: f/3.8 Newtonian
Astrograph with a Moravian
G316200 CCD camera.
Total exposure: 32 hours
through color and narrow-
band fi lters.
p RECTANGULAR GATHERING
Bruce Waddington
Nicknamed “The Box,” the compact galaxy group
Hickson 61 includes (clockwise from top) NGC
4173, NGC 4169, NGC 4174, and NGC 4175.
DETAILS:PlaneWave 12.5-inch CDK with a QSI
640ws CCD camera. Total exposure: 10.3 hours
through LRGB fi lters.
p BIG SPOT
Barry Burgess
After more than a year of scant solar activity, large sunspot
group AR2738 appeared in mid-April, putting on a wonderful
show for patient solar observers.
DETAILS:Canon 7D Mark II DSLR camera with Rubinar 1,000-
mm f/11 mirror lens with solar fi lter. Total exposure:^1 / 125125 second
at ISO 800.