Constellation Corona Australis (Southern Crown)

Properties

Corona Australis is located south of the Teapot in Sagittarius and follows the curved tail of Scorpius. Although it does not contain any particularly bright stars, it still has a distinctive shape of half an ellipse and lies on the edge of the Milky Way ribbon. The constellation area is 128 square degrees and the center culminates around midnight on June 30th. ^{[9, 15]}

Stars with Proper Names:

α CrA: Alfecca Meridiana

Data for constellation Corona Australis ^[150]
IAU Name	Corona Australis
IAU Genitive	Coronae Australis
IAU Abbr.	CrA
English Name	Southern Crown
Season (47° N)	June … August
Right Ascension	17^h 58^m 30^s … 19^h 19^m 05^s
Declination	-45° 30' 59" … -36° 46' 43"
Area	128 deg²
Neighbours (N↻)	Sgr, Sco, Ara, Tel

Mythology and History

The southern counterpart to Corona Borealis, the Northern Crown, has been known since the time of the Greek astronomer Ptolemy in the second century AD. One interpretation shows it to be the crown of the centaur Sagittarius. ^[7]

Catalogs

Yale Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991) ^[154]
HR	B	RA [hms]	Dec [dms]	vMag	spType	dMag	Sep ["]
6951	θ	18 33 30.2	-42 18 45	4.64	G8III
6952	κ¹	18 33 23.3	-38 43 13	6.32	A0III	0.7	21.4
6953	κ²	18 33 23.1	-38 43 34	5.65	B9V	0.7	21.4
7021	λ	18 43 46.9	-38 19 25	5.13	A2Vn	4.5	29.2
7050	μ	18 47 44.6	-40 24 22	5.24	G5-6III
7062	η¹	18 48 50.5	-43 40 48	5.49	A3V
7068	η²	18 49 35.0	-43 26 02	5.61	B9IV
7152	ε	18 58 43.4	-37 06 27	4.87	F2V
7188	ζ	19 03 06.9	-42 05 43	4.75	B9.5V
7226	γ	19 06 25.1	-37 03 48	4.93	F8V	0.1	1.6
7227	γ	19 06 25.1	-37 03 48	4.99	F8V	0.1	1.6
7242	δ	19 08 20.9	-40 29 48	4.59	K1III
7254	α	19 09 28.3	-37 54 16	4.11	A2V
7259	β	19 10 01.7	-39 20 27	4.11	K0II

Revised+Historic NGC/IC, Version 22/9, © Dr. Wolfgang Steinicke ^[277]
Planetary Nebulae
Name	RA	Dec	Type	bMag	vMag	Dim	Dreyer Description	Identification, Remarks
IC 1297	19 17 23.4	-39 36 45	PN	10.6	10.7	0.4	Stellar (gaseous spectrum)	PK 358-21.1, ESO 337-PN20, CS=12.9
Galactic Nebulae
Name	RA	Dec	Type	bMag	vMag	Dim	Dreyer Description	Identification, Remarks
NGC 6726	19 01 39.2	-36 53 29	RN			9 × 7	* 6·7 in F, pL, neb	ESO 396-N13, pair with N 6727
NGC 6727	19 01 42.2	-36 52 35	RN			80	* 8 in F, pL neb	ESO 396-N14, pair with N 6726
NGC 6729	19 01 55.3	-36 57 28	EN+RN			25 × 20	Var * (11…) with neb!!	ESO 396-N*15
IC 4812	19 01 03.5	-37 03 37	RN+*			10 × 7	* 7 inv in eL neb	ESO 396-*N12, CED 165A
Globular Clusters
Name	RA	Dec	Type	bMag	vMag	Dim	Dreyer Description	Identification, Remarks
NGC 6541	18 08 02.2	-43 42 40	III		6.3	15	globular, B, R, eC, gbM, rrr, st 15…16	GCL 86, ESO 280-SC4
Galaxies
Name	RA	Dec	Type	bMag	vMag	Dim	Dreyer Description	Identification, Remarks
NGC 6768 1	19 16 32.7	-40 12 31	E4	13.2	12.2	1.2 × 1.1	vF, S, R, pslbM	ESO 337-18, MCG -7-39-10
NGC 6768 2	19 16 29.7	-40 13 22	S0	13.9	12.9	0.6 × 0.4	vF, S, R, pslbM	ESO 337-17, MCG -7-39-9
IC 4808	19 01 07.5	-45 18 51	Sc	12.9	12.3	2 × 0.8	vF, cL, cE 45°, lbM, susp	ESO 282-3, IRAS 18574-4523

References

7	«Der grosse Kosmos-Himmelsführer» von Ian Ridpath und Wil Tirion; Kosmos Verlag; ISBN 3-440-05787-9
9	«Drehbare Sternkarte SIRIUS» von H. Suter-Haug; Hallwag-Verlag, Bern
15	«Hartung's Astronomical Objects for Southern Telescopes» by David Malin and David J. Frew; Melbourne University Press 1995; ISBN 0-522-84553-3
150	IAU: The Constellations, 11. Oktober 2020; iau.org/public/themes/constellations
154	Yale Bright Star Catalog, 15. Oktober 2020; tdc-www.harvard.edu/catalogs/bsc5.html
277	«Historische Deep-Sky Kataloge» von Dr. Wolfgang Steinicke; klima-luft.de/steinicke (2021-02-17)