AUGUST 2021 OBSERVING Lunar Almanac Northern Hemisphere Sky Chart 19 21 22 Yellow dots indicate which part of the Moon's limb is tipped the most toward Earth by libration. August 4 NASA / LRO MOON PHASES MON SUN 1 8 15 22 29 2 9 16 23 30 3 10 17 24 31 TUE WED 45 11 18 25 12 19 26 THU 6 13 20 27 FRI 7 14 21 28 SAT NEW MOON FIRST QUARTER August 8 13:50 UT FULL MOON August 22 12:02 UT DISTANCES Apogee August 15 15:20 UT LAST QUARTER August 30 07:13 UT August 2, 08h UT 404,409 km Diameter 29′ 33″ Perigee August 17, 09h UT 369,125 km Diameter 32′ 22″ Apogee 404,098 km Diameter 29′ 34″ FAVORABLE LIBRATIONS * Piazzi Crater * Hayn Crater August 30, 02h UT Planet location shown for mid-month August 4 August 19 * Compton Crater August 21 * Boss F Crater 42 AUGUST 2021 * SKY & TELESCOPE August 22 USING THE NORTHERN HEMISPHERE MAP Go out within an hour of a time listed to the right. Turn the map around so the yellow label for the direction you're facing is at the bottom. That's the horizon. The center of the map is overhead. Ignore the parts of the map above horizons you're not facing. Exact for latitude 40°N. -40° c i 18 n g -1 1 2 3 4 Galaxy star y Double star Variable star Open cluster Diffuse nebula Globular cluster Planetary nebula able star n cluster ebula ter α β I C δ S E 3h 0h E C M30 F a 21h F a γ ε α Polaris r o N h L I P T CAPRICORNUS c i n g Moon Aug 18 SAGITTARIUS SCUTUM M17 μ M25 σ τ ζ ε M22 CORONA AUSTRALIS SERPEN (CAUDA) M11 M16 70 VULPECULA M27 AQUARIUS ζ Altair β η AQUILA α γ DELPHINUS EQUULEUS LYRA Deneb Northern Cross CYGNUS 61 M29 M15 PEGASUS Great Square of Pegasus PISCES E g a CAMELOPARDALIS ε PERSEUS β γ δ CASSIOPEIA Double Cluster CEPHEUS β γ δ ANDROMEDA M31 LACERTA SAGITTA IC θ M2 β α M52 α Vega R M57 Albireo M39 c i n a ι δ χ α γ ε ε η β μ θ ζ α F s t α a F g n c i E N h t γ α γ α μ α ε δ γ β β η β γ Jupiter Saturn Moon Aug 21