Johannesburg Centre, Astronomical Society of Southern Africa

Spring Constellations

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August

 

September

 

October

 

Aquarius

 

Pegasus

 

Andromeda

 

Capricornus

 

Pisces

 

Aries

 

Equuleus

 

Sculptor

 

Cetus

 

Grus

 

Tucana

 

Hydrus

 

Indus

 

 

Phoenix

 

Lacerta

 

 

Triangulum

 

Microscopium

 

 

 

Octans

 

   

 

Piscis Austrinus

 

Cephus

  Casseopeia

  

 

 

   

 

Constellations listed with a grey background are never visible from most of South Africa

 


Andromeda (And) Andromeda

 

NGC224

M31

Andromeda Galaxy

RA 00h42.7'

 

Dec +41°16'

 

Mv=3.4

Galaxy

 

A vast spiral galaxy, well tilted to the line of sight. Twice as massive as our Milky Way Galaxy. Most distant object generally visible to the naked eye. Also visible is a smaller companion galaxy, NGC 205 M110 (below the disk) and NGC 221 M32 (along upper rim of the disk). This is the nearest big spiral galaxy to ours, also a member of the Local Group. It is 2.9 million ly distant and has a diameter of about 170000ly. Through binoculars under good conditions, it stretches over 3°.

 


[Index]

 

Aquarius (Aqr) the Water Bearer

 

NGC7009

Saturn Nebula

RA 21h04.2'

 

Dec -11°22'

 

Mvv=8.3

Planetary Nebula

 

A bright planetary nebula, named for its visual similarity to the Planet Saturn. At some 39000 ly distance, it subtends 30"x26".

 

 


 

 

NGC7089

M2

RA 21h33.5'

 

Dec -00°49'

 

Mv=6.5

Globular Cluster

 

Compact and fairly dense, this is one of the richer globulars. Within it are mostly red and yellow giants. About 100000 stars are packed into a space of 400 ly. At 40000 ly distance, it subtends 12'.

 


 

NGC7293

Helix Nebula

RA 22h29.6'

 

Dec -20°48'

 

Mv=6.3

Planetary Nebula

 

One of the closest planetary nebulae, also one of the apparently largest planetaries known. At a distance of 150 to 450 ly, it subtends an enormous 12'x16' (about half the size of the Moon). Although quite bright, its light is spread over this large area so not an easy object for visual observing, but it can be seen in binoculars.

 


 

 

[Index]

Aries (Ari) the Ram

 

[Index]

Capricornus (Cap) the Sea Goat

 

NGC7099

M30

RA 21h40.4'

 

Dec -23°11'

 

Mv=7.5

Globular Cluster

 

Has a fairly dense stellar population - a fine object in even small telescopes. Lying at a distance of about 24000 ly, it subtends 9'.

 


 

[Index]

Cetus (Cet) the Whale

 

[Index]

Equuleus (Equ) the Little Horse

 

[Index]

Grus (Gru) the Crane

 

[Index]

Hydrus (Hyi) the southern Water Snake

 

[Index]

Indus (Ind) the Indian

 

[Index]

Lacerta (Lac) the Lizard

 

[Index]

Microscopium (Mic) the Microscope

 

[Index]

Octans (Oct) the Octant

 

[Index]

Phoenix (Phe) the Phoenix

 

[Index]

Piscis Austrinus (PsA) the Southern Fish

 

[Index]

Pegasus (Peg) Pegasus

 

NGC7078

M15

RA 21h30.0'

 

Dec +12°10'

 

Mvv=6.4

Globular Cluster + Planetary Nebula

 

Nearly a twin of M2, it is unusual in that it contains a planetary nebula. This rich globular is visible in binoculars.

 


 

[Index]

Pisces (Psc) the Fishes

 

[Index]

Sculptor (Scl) the Scupltor

 

NGC253

Silver Coin Galaxy

RA 00h47.6'

 

Dec -25°17'

 

Mv=7.2

Galaxy

 

Best example of an edge-on spiral galaxy,  the nearest starburst spiral galaxy. Called a "starburst" galaxy because of the extremely high rate of star formation taking place in its core. Among the brightest of galaxies visible, it can be discerned in binoculars. Apparent dimensions are 25' x 7'.

 


[Index]

Triangulum (Tri) the Triangle

 

NGC598

M33

Triangulum / Pinwheel Galaxy

RA 01h33.9'

 

Dec +30°39'

 

Mv=5.7

Galaxy

 

Clockwise-swirling spiral with wildly spinning arms.  After Andromeda and the Milky Way, this is the largest member of the Local Group. At 2.2 to 2.9 million ly, it is also the second-closest spiral to us. Although its diameter of almost 1° is large, its surface brightness is low so it is difficult to observe. Binoculars or a telescope with a wide field will help.

 


 

[Index]

Tucana (Tuc) the Toucan

 

NGC104

47 Tucanae

RA 00h24.1'

 

Dec -72°05'

 

Mv=4

Globular Cluster

 

Second only to Omega Centauri as the largest, brightest and most spectacular naked-eye globular clusters. Some would argue it is the best. It can be seen with the naked eye. It lies at a distance of some 13000 to 20000 ly. Its brightest stars are Mv 11.5, necessitating a telescope to separate them.

 

 


 

 

[Index]

 

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