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Type: open cluster
Mag: B=11.39, V=11.04
John Herschel recorded it as "bright, round, gradually brighter in the middle; the preceding nebula." The next observation was recorded as "pretty bright, small, round, insulated in the recess of an arc-formed nebulous cluster (See plate III fig 6 for this and several following objects)." On a third occasion he noted it as "pretty faint, round, gradually brighter in the middle; insulated within an arc." The final observation was recorded as "pretty bright, round, gradually brighter in the middle, 2'. An arc of faint stars connects it with another." The other object is NGC 1874. Also in this grouping are NGC 1877 and NGC 1880.
Henize (Catalogues of Hydrogen Alpha Emission Stars and Nebulae in the Magellanic Clouds, Astrophysical Journal Supplement 2, 1956, p315) notes that his nebula LH N 120-113A "Contains NGC 1872 which is a cluster without hydrogen alpha emission." His nebula measures 6.2' x 9.3' (east-west by north-south) has a somewhat irregular outline, is slightly elongated and shows considerable structural detail.
Shapley and Lindsay ("A Catalogue of Clusters in the Large Magellanic Cloud", Irish Astronomical Journal, Vol. 6, 1963) give a diameter of 45'' and remark "round, condensed, unresolved, in nebulosity."
Van den Bergh and Hagen ("UBV photometry of star clusters in the Magellanic Clouds", Astronomical Journal, Vol. 73, 1968) find that the integrated V magnitude through a 60'' diaphragm is 11.04. They remark: "The emission nebula Henize N 113 surrounds this open cluster."
The RNGC (Sulentic and Tifft 1973) notes that this is a cluster+nebulosity in the LMC.
15cm - mod br circ spot 1' diam @ 140x w/strong even concen. *ry texture nr
cen, but smooth halo. m14.5 * at NW edge. BS, 13Nov1993, LCO.
The Messier objects
The Bennett objects
The Caldwell list
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