Sky & Telescope - August 2024 - 23

Large Sagittarius RA 18h 00m Dec. -29° 15′
Object
Type
THE ARCHER'S DUO West of the
Teapot asterism is the larger of the two
star clouds we'll visit on this tour in
Sagittarius. This image and the one on
page 24 were captured under the dark
skies of Eastern Maine on photographic
film using a Pentax 67 camera
with a 400-mm f/4 prime lens piggybacked
on an 8-inch Meade 2080.
B295
B289
NGC 6520
B86
NGC 6522
Baade's Window
NGC 6528
B298
Dark nebula
Dark nebula
Open cluster
Dark nebula
Globular cluster
Star field
Globular cluster
Dark nebula
stretching in a northeast-to-southwest direction with M7 near
its geometric center. The dark nebula B287, spanning 25′ × 15′,
lies immediately southeast of the cluster, while the smaller
oval of B286, some 15′ across, sits around 50′ south of M7 and
features the 6th-magnitude foreground star HD 162517. When
I aim right at M7 with my 85-mm refractor with a 13-mm
Ethos eyepiece (46× and 2.2° field of view), I see a spectacular
vista. The cloud behind M7 appears off-white - a striking
contrast with the blue-white stars of the cluster. Images reveal
a yellow tinge to these ancient stars near the Milky Way's core.
Two concentrations of stars lie within the larger star cloud.
Look for 40′-wide NGC 6437 about 1° southwest of M7.
Between NGC 6437 and M7, you'll find NGC 6455, a Milky
Mag(v)
-
-
7.6
-
9.9
4
9.6
-
Size
50′
35′ × 7′
5′
5′
9.4′
60′
5′
4′
RA
Dec.
18h 04.1m
17h 56.6m
18h 03.4m
18h 03.0m
18h 03.6m
18h 03.6m
18h 04.8m
18h 05.2m
-32° 00′
-29° 01′
-27° 53′
-27° 52′
-30° 02′
-30° 02′
-30° 03′
-30° 06′
Way field featuring several 7th- to 9th-magnitude stars. At
first, I couldn't distinguish these clumpings of stars with my
small refractor from the broader cloud. But I finally extracted
them with my 10-inch Dob fitted with a 35-mm Panoptic
yielding a 2° field. (A tip of the hat to Chris Beckett of the
Royal Astronomical Society of Canada for pointing me to
these little concentrations.)
Now slew to the Large Sagittarius Star Cloud northwest
of the spout of the Teapot asterism. Here we're looking
directly toward the center of our galaxy some 26,000 lightyears
away. The cloud's brightest section spans about 6° × 4°
and extends northeast to southwest on its long axis. Along
its northwestern edge it borders the dark Great Rift, which
sk yand tele scope .o r g * AUGUST 2024 23
JAMES W. CORMIER

https://skyandtelescope.org/

Sky & Telescope - August 2024

Table of Contents for the Digital Edition of Sky & Telescope - August 2024

Contents
Sky & Telescope - August 2024 - Cover1
Sky & Telescope - August 2024 - Cover2
Sky & Telescope - August 2024 - 1
Sky & Telescope - August 2024 - Contents
Sky & Telescope - August 2024 - 3
Sky & Telescope - August 2024 - 4
Sky & Telescope - August 2024 - 5
Sky & Telescope - August 2024 - 6
Sky & Telescope - August 2024 - 7
Sky & Telescope - August 2024 - 8
Sky & Telescope - August 2024 - 9
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Sky & Telescope - August 2024 - Cover3
Sky & Telescope - August 2024 - Cover4
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