Sky & Telescope - October 2021 - 41

OBSERVING
October 2021
2 EVENING: Algol shines at
14 DUSK: The waxing gibbous Moon,
minimum brightness for roughly two
hours centered at 10:24 p.m. PDT (see
page 50).
3 DAWN: The waning crescent Moon
and Regulus rise in tandem in the east;
a bit more than 4° separates the pair.
4 MORNING: Look toward the east
before morning twilight from a dark
spot to see the zodiacal light. For the
next two weeks, viewers at northern
latitudes should see a tall and dim
pyramid of light stretching up through
Cancer and Gemini into Taurus. (See
our feature about its relative, the
gegenschein, on page 34.)
5 EVENING: Algol shines at
minimum brightness for roughly two
hours centered at 10:13 p.m. EDT.
9 DUSK: Low in the southwest, the
waxing lunar sliver and brilliant Venus
are some 2½° apart in the Scorpion's
head, while Antares smolders 6° to
their left. See pages 46-47 for more
details on this and other events
outlined here.
Jupiter, and Saturn form a triangle
above the south-southeastern horizon
after sunset.
15 DUSK: Venus is positioned 1½°
upper right of the Scorpion's heart,
Antares. The Evening Star remains
close to the red supergiant the next
two evenings.
20 DAWN: Mercury shepherds
Porrima, Gamma (γ) Virginis, as
they rise together in the east. Bring
binoculars.
21 MORNING: The Orionid meteor
shower peaks in the early hours.
The Moon is just past full, severely
hampering viewing.
23 DAWN: If you're up before sunrise,
look for Taurus high in the westsouthwest
to see the waning gibbous
Moon some 4° left of the Pleiades.
24 DAWN: This morning the Moon is
on the other side of the Bull's head,
around 6½° upper right of Aldebaran,
the Bull's eye.
25 DAWN: Still in Taurus, the Moon
is neatly positioned midway between
Zeta (ζ) and Beta (β) Tauri, the tips of
the Bull's horns.
25 EVENING: Algol shines at
minimum brightness for roughly two
hours centered at 8:54 p.m. PDT
(11:54 p.m. EDT).
27 DAWN: High in the south, the
waning gibbous Moon visits Gemini
and is around 5° lower right of Pollux.
28 EVENING: Algol shines at
minimum brightness for roughly two
hours centered at 8:43 p.m. EDT.
31 DAWN: Tiny Mercury is still in
Virgo, and this morning it leads Spica
above the horizon, with less than 5°
separating the brilliant duo.
- DIANA HANNIKAINEN
pVenus is the blazing Evening Star this
month. On the 9th it's joined by the waxing
crescent Moon in a scene that will be similar
to the one pictured here from June 2021.
ALAN DYER
sk yand tele scope .o r g * OCTOBER 2021 41
http://skyandtelescope.org

Sky & Telescope - October 2021

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

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