Sky & Telescope - August 2021 - 21

jump off from Beta (β) Cygni, or Albireo, and slew 2° eastsoutheast
to reach NGC 6813. This emission nebula shimmers
around a 13th-magnitude star and is between two
orange 9th-magnitude stars (HD 338691 and HD 338692),
situated much closer to the westernmost of the pair. If you
next slide some ½° southeast, you'll come upon LDN 799,
as well as about 10 other dark nebulae within the fi eld.
Heading 4° southwest you can also view LDN 778 with
the refl ection nebula vdB 126 a little more than 1° to its
south. However, one dark nebula that I particularly enjoyed
observing was LDN 810. You can detect this dark cloud quite
readily by noting how the background changes, despite the
numerous bright fi eld stars.
Somewhat counterintuitively, perhaps, dark nebulae can
also guide you to faint emission or refl ection nebulae, if
Vulpecula
Object
NGC 6813
LDN 799
LDN 778
vdB 126
LDN 810
Type
Emission
Dark
Refl ection
Size/Sep
3′ × 2′
10′ × 10′
7′ × 5′
RA
Dec.
19h 40.4m +27° 18′
19h 42.6m +26° 57′
Dark - 19h 26.5m +23° 59′
19h 26.2m +22° 43′
Dark - 19h 45.4m +27° 51′
GN 19.43.3.01 Refl ection - 19h 45.6m +27° 51′
+20°
VULPECULA
M27
+30°
they're in the same fi eld of view. Navigating to LDN 810
leads you to the diffi cult refl ection nebula GN 19.43.3.01,
which normally wouldn't rate inclusion on many a list. This
is the one object discussed here that I wouldn't propose for
22h
+50°
2
B168
+40°

M29


CYGNUS
M56
LDN 810
GN 19.43.3.01
LDN 799
6813


LDN 778
vdB 126
Albireo
1
2
3
4
5
6
M57
DG 170
DG 171
IC 5146
vdB 147
M39
DG 169
LDN 988

Deneb

LYRA
Vega
DRACO
21h
GN 20.59.5.01
20h
19h
HD 200740
GN 20.59.5.01
V1331 Cyg
DG 169,
DG 170
DG 171
LDN 988
MYRIAD OBJECTS In the northern
reaches of Cygnus, the Swan, you'll fi nd
this delightful collection of targets that
includes dark patches and tendrils, bright
emission objects, and a variable star.
sk yandtelescope.org * AUGUST 2021 21
JOSEF PÖPSEL / STEFAN BINNEWIES / FRANK
SACKENHEIM / CAPELLA OBSERVATORY
Star magnitudes

http://www.skyandtelescope.org

Sky & Telescope - August 2021

Table of Contents for the Digital Edition of Sky & Telescope - August 2021

Contents
Sky & Telescope - August 2021 - Cover1
Sky & Telescope - August 2021 - Cover2
Sky & Telescope - August 2021 - 1
Sky & Telescope - August 2021 - Contents
Sky & Telescope - August 2021 - 3
Sky & Telescope - August 2021 - 4
Sky & Telescope - August 2021 - 5
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