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Type: open cluster
Mag: B=?, V=11.26
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Dunlop, J. (1828) A Catalogue of Nebulae and Clusters of Stars in the Southern Hemisphere, Observed at Paramatta in New South Wales. Phil. Trans. Roy. Soc., 118, 113-151. [1828RSPT..118..113D]
Discovered by James Dunlop from Paramatta, New South Wales, and included it as No. 114 in his catalogue of 1827. Using a 9-inch f/12 telescope, he described it as "a small round nebula, about 20 arcseconds diameter, bright at the centre."
John Herschel recorded it as "round, gradually brighter in the middle; 2' (thick haze)." He next saw it as "bright, round, resolvable; No. 2 in a group of four foming a sort of lozenge." The four objects are NGC 1737, 1743, 1745 and NGC 1748.
Recorded in "Observations of the Southern Nebulae made with the Great Melbourne Telescope".
See the discussion of Lithograph M.3.22 for the details.
"nebula, irregular, nucleus, LMC."
Bailey, S.I. (1908) A catalogue of bright stars and nebulae. Ann.Harv.Coll.Obs., 60(8), 199.
Remarks, p.217: "the spectrum is gaseous."
The Magellanic Clouds, IV. Harvard Circular 271
(p7): NGC 1743: "Nebulous mass with central star."
'Central star too involved in nebulosity to measure separately.'
According to Henize it measures 1' across, has a slightly irregular outline, is somewhat elongated and appears smooth, showing no structure. He notes that it is also known as HD 31947 Pc.
Shapley and Lindsay ("A Catalogue of Clusters in the Large Magellanic Cloud", Irish Astronomical Journal, Vol. 6, 1963) give a diameter of 20'' and remark "few stars condensed in dense nebulosity."
The RNGC (Sulentic and Tifft 1973) notes that this is a cluster+nebulosity in the LMC.
ASV Journal Vol 24 No 3 June 1971: "faint in 4-inch 64x."
15cm - mod br vsm spot of hisfcbr @ 80x. good UHC enhancement. 195x: m12.5 * sup, otherwise unres. 45" diam. BS, 12Nov1993, LCO.
The Messier objects
The Bennett objects
The Caldwell list
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