Webb Deep-Sky Society's
Objects of the Month - 2021
Observing guides for the Webb Deep-Sky Society's galaxy, nebula, star cluster and double stars of the month in the year 2021.
Use the button(s) to download the objects of the month in the image orientation of your choice, click the object's name to visit the corresponding page on the Webb-site. Please read Downloading CSOG and iPad Astronomy.
Jump to month...
January - February - March - April - May - June - July - August - September - October - November - December
Download - 2021
All the Webb Deep-Sky Society's Objects of the Month for the year 2021.
Observing guides (pages): 65 (143)
Index files: 1
AstroPlanner planfiles: 1
10 open clusters
3 globular clusters
2 nebulae
10 planetary nebulae
5 galaxies
6 galaxy groups
1 galaxy cluster
2 asterisms
26 double stars
January 2021
Galaxy of the Month
Galaxy group Holmberg 124 in Ursa Major



Star Clusters of the Month




Open cluster NGC2158 in Gemini


Open cluster Messier 35 (NGC2168) in Gemini


Nebula of the Month
Reflection nebula NGC2261 - "Hubble's Variable Nebula" in Monoceros


Double Stars of the Month
32 Orionis (STF728 - WDS05308+0557) in Orion


"Mintaka" - Delta Orionis (STFA14 - WDS05320-0018) in Orion


February 2021
Galaxy of the Month
Galaxy group WBL 142 in Gemini



Star Cluster of the Month


Nebula of the Month
Planetary nebula NGC2610 in Hydra


Double Stars of the Month
Phi-2 Cancri (STF1223 - WDS08268+2656) in Cancer


Upsilon Cancri (STF1224 - WDS08267+2432) in Cancer


Pi Puppis (Dunlop 43 - WDS07171-3706) in Puppis


March 2021
Galaxy of the Month



Star Cluster of the Month
Asterism NGC3231 in Ursa Major


Nebula of the Month
Planetary nebula NGC3242 - the "Ghost of Jupiter" in Hydra


Double Stars of the Month
STF1426 (WDS10205+0626) in Leo


Burnham 208 (WDS08391-2240) in Pyxis


April 2021
Galaxy of the Month
Galaxy pair NGC3636 & NGC3637 in Crater



Star Cluster of the Month
Globular cluster Messier 3 (NGC5272) in Canes Venatici


Nebula of the Month
Planetary nebula IC3568 - the "Lemon Slice Nebula" in Camelopardalis


Double Stars of the Month
35 Sextantis (STF1466 - WDS10433+0445) in Sextant


Cape Observatory 12 (WDS12283-6146) in Crux


May 2021
Galaxy of the Month



Star Cluster of the Month
Globular cluster NGC5634 in Virgo


Nebula of the Month
Planetary nebula NGC6058 in Hercules


Double Stars of the Month
1 Boötis (STF1772 - WDS13407+1957) in Boötes





June 2021
Galaxy of the Month



Star Cluster of the Month
Globular cluster Messier 107 (NGC6171) in Ophiuchus


Nebula of the Month
Planetary nebula NGC6210 - the "Turtle Planetary Nebula" in Hercules



Double Stars of the Month
STF1972 (WDS15292+8027) in Ursa Minor


Herschel VI 51 (WDS14576-0010) in Virgo


Burnham 348 (WDS15018-0008) in Virgo


July 2021
Galaxy of the Month


Star Cluster of the Month
Open cluster NGC6633 - the "Wasp-Waist Cluster" in Ophiuchus


Nebula of the Month
Planetary nebula NGC6742 in Draco


Double Stars of the Month
STF2244 (WDS17571+0004) in Ophiuchus


Kappa-2 Coronae Australis (Dunlop 222 - WDS18334-3844) in Coronae Australis


August 2021
Galaxy of the Month
Galaxy pair NGC6658 & NGC6661 in Hercules


Star Cluster of the Month
Open cluster NGC6940 - the "Mothra Cluster" in Vulpecula


Nebula of the Month
Planetary nebula NGC7008 - the "Fetus Nebula" in Cygnus





Double Stars of the Month
STT358 (WDS18359+1659) in Hercules


"Arkab Prior" - Beta-1 Sagittarii (Dunlop 226 - WDS19226-4428) in Sagittarius


September 2021
Galaxy of the Month
Galaxy group Holmberg 802 in Pegasus



Star Cluster of the Month
Open cluster Mayer 1 & emission nebula Simeis 21 in Cassiopeia


Nebula of the Month
Planetary nebula NGC7354 in Cepheus


Double Stars of the Month
STF2883 (WDS22106+7008) in Cepheus


Harvard 298 (WDS22183-5338) in Grus


October 2021
Galaxy of the Month
Galaxies NGC870, NGC871, NGC876 & NGC877 in Aries


Star Cluster of the Month
Open clusters NGC133, NGC146 & King 14 in Cassiopeia


Nebula of the Month
Planetary nebula NGC246, the "Skull Nebula" in Cetus


Double Stars of the Month
STF3053 (WDS00026+6606) in Cassiopeia


STF3008 (WDS23238-0828) in Aquarius


November 2021
Galaxy of the Month
Galaxy cluster Abell 347 in Andromeda



Star Cluster of the Month
Open cluster NGC1245 - the "Patrick Starfish Cluster" in Perseus


Nebula of the Month
Planetary nebula IC2003 in Perseus


Double Stars of the Month
Phi Andromedae - STT515 (WDS01095+4715) in Andromeda


66 Ceti - STF231 (WDS02128-0224) in Cetus


December 2021
Galaxy of the Month


Star Cluster of the Month
Open cluster and emission nebula NGC1624 in Perseus


Nebula of the Month
Emission nebula NGC1579 - the "Northern Trifid Nebula" in Perseus


Double Stars of the Month
STT65 (WDS03503+2535) in Taurus


Dunlop 15 (WDS03398-4022) in Eridanus

