Sagittarius, the Archer (Sgr)
(SAJ-ih-TARE-ee-us)
The Southern constellation of Sagittarius, the Archer, is best viewed in Summer during the month of August. It's brightest star is Kaus Australis at magnitude 1.79. The boundary of the Sagittarius constellation contains 22 stars that host known exoplanets.
Ross?154 is the 9th closest star to Earth at 9.7 light years.
- Pronunciation:
- SAJ-ih-TARE-ee-us
- Meaning:
- Archer
- Genitive:
- Sagittarii
- Abbreviation:
- Sgr
- Asterism:
- Teapot
- Constellation Family:
- Zodiacal
- Hemisphere:
- Southern
- Quadrant:
- SQ4
- Best viewing month*:
- August
- Right Ascension (avg):
- 19h 23m
- Declination (avg):
- -29° 53'
- Brightest star:
- Kaus Australis (1.79)
- Stars with planets:
- 22
Brightest Stars in Sagittarius
The 10 brightest stars in the constellation Sagittarius by magnitude.
- Star
- Magnitude
- Spectral class
- Epsilon Sagittarii
- 1.79
- B9.5III
- Sigma Sagittarii
- 2.05
- B2.5V
- Zeta Sagittarii
- 2.6
- A3IV
- Delta Sagittarii
- 2.72
- K3III
- Lambda Sagittarii
- 2.82
- K1IIIb
- Pi Sagittarii
- 2.88
- F2II/III
- Gamma Sagittarii
- 2.98
- K0III
- Eta Sagittarii
- 3.1
- M2III
- Phi Sagittarii
- 3.17
- B8.5III
- Tau Sagittarii
- 3.32
- K1/K2III
Star Clusters in Sagittarius
The most notable, famous, and easy-to-find star clusters in the constellation Sagittarius :
- Star cluster
- Catalog #
- Cluster type
- ESO 456-78
- globular
- Messier 18
- M18
- open
- Messier 21
- M21
- open
- Messier 23
- M23
- open
- Messier 24
- M24
- open
- Messier 25
- M25
- open
- Messier 28
- M28
- globular
- Messier 55
- M55
- globular
- Messier 69
- M69
- globular
- Messier 70
- M70
- globular
- Messier 75
- M75
- globular
- NGC 6440
- globular
- NGC 6522
- globular
- NGC 6528
- globular
- NGC 6540
- globular
- NGC 6544
- globular
- NGC 6553
- globular
- NGC 6558
- globular
- NGC 6569
- globular
- NGC 6624
- globular
- NGC 6638
- globular
- NGC 6642
- globular
- NGC 6652
- globular
- NGC 6717
- globular
- NGC 6723
- globular
- Palomar 8
- globular
- Sagittarius Cluster
- M22
- globular
- Terzan 5
- globular
Nebulae in Sagittarius
The most notable, famous, and easy-to-find nebulae in the constellation Sagittarius:
- Nebula name
- Catalog #
- Nebula type
- Barnard's Bubble Nebula
- diffuse
- Eye of Sauron Nebula
- planetary
- Inkspot Nebula
- dark
- Lagoon Nebula
- M8
- emission
- Little Gem Nebula
- planetary
- Omega Nebula
- M17
- emission
- Pistol Nebula
- emission
- Red Spider Nebula
- planetary
- Trifid Nebula
- M20
- reflection
Galaxies in Sagittarius
The most notable, famous, and easy-to-find galaxies in the constellation Sagittarius:
- Galaxy name
- Catalog #
- Galaxy type
- Barnard's Galaxy
- C57
- barred irregular
- Kowal's Object
- dwarf
- Sagittarius Dwarf
- elliptical dwarf
Neutron Stars in Sagittarius
These are the most well-known neutron stars in the constellation Sagittarius. Although neutron stars cannot be seen in any amateur telescope, they are at the center of many supernova remnant nebulae, which can be seen.
Black Holes in Sagittarius
These are the most well-known smaller (non-supermassive) black holes in the constellation Sagittarius. Although black holes cannot be seen directly, the smaller ones are at the center of some star clusters and supernova remnant nebulae, which can be seen. Supermassive black holes are at the center of most galaxies, such as Sagittarius A* at the center of our Milky Way galaxy.
- Black hole
- Type
- GCIRS 13E
- intermediate
- Sagittarius A*
- supermassive
- V4641 Sgr
- stellar
Exoplanets in Sagittarius
These are the most notable named exoplanet systems known in the constellation Sagittarius. Bear in mind that we will likely discover billions of exoplanets in the years to come.
* For southern latitudes, flip the season listed. For example, if a constellation is listed as best viewed in the summer in the month of July, in the southern hemisphere the constellation would be best viewed in the winter in January and would be upside-down.
** Circumpolar constellations are visible year-round in the hemisphere listed (and not at all in the opposite).