The Henize Catalogue Of SMC Emission Nebulae.

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In 1956 Karl Henize published the results of an extensive survey of both Magellanic Clouds for emission line objects, stars and nebulae. Five catalogues of objects were published, three for the LMC and two for the SMC. The file I present here deals with just one Henize list, that listing the SMC emission nebulae. The coordinates are now given for equinox 2000, with higher precision. The various data fields are explained as follows:

Object Name: The full name of the first entry, according to Henize's system, is LHa115-N1. "L" refers to the Lamont-Hussey Observatory of the University of Michigan; "Ha" means the Hydrogen-alpha emission line, the key signature line used in the survey; "115" refers to the plate number (objective prism plate) for the SMC; "N" labels the object as a nebula, as distinct from a star (label "S"). Some of the more complex nebulae are subdivided, using the letters A,B,C etc to indicate related knots of nebulosity within the complex.
NGC number: Given where known.
GSC number: Given where there is no uncertainty.
Position for J2000. Adopted from one of several sources.

Code:   A = USNO-A2.0 catalogue.
        B = BSDL catalogue (Astron.J. 117,238, 1999).
        E = Estimated by MM.
        G = Guide Star Catalogue.
        HZ = K. Henize (1956).

Dimensions: Henize gives dimensions for his nebulae, but point source ones, d <15", are generally blank. When one compares the values given in a recent BSDL catalogue, based on scans of big Schmidt plates, the more modern values are generally larger. Generally, but not always.

The big Schmidts can record fainter outlying portions of many nebulae which were invisible on Henize's plates. I surmise that this is the reason for the discordance. I have found it worth recording both sets of dimensions, so that the user may decide for himself which is more relevant.

Notes: Explanatory notes are given at the end of the table. Some are copied from Henize's 1956 paper, as an aid to identification.

References: Henize, K.G.1956, Astrophys. J. Suppl. 2,315 Monet, D. et al 1998. USNO-A2.0 astrometric catalogue. USNO, Flagstaff

The Henize Catalogue of Emission Nebulae in the SMC

      Compiled by Mati Morel.                          2001 August 18
      *********************************************************************
      *    Morel Astrographics : Stellar Data; Variable Stars; Charts     *
      *        http://www.ozemail.com.au/~morel       *
      *********************************************************************

                                                       Dimensions (Arcmin)
      LHa115-  NGC     GSC         RA (2000)  DEC.     Henize 56   BSDL
    ========================================================================
                                 h  m  s      '  "     E-W  N-S  E-W   N-S
    N    1         9140.01639    0 23 54  -73 38 23 G
    N    2                       0 32 39  -71 42  0 A
    N    3         9140.01466    0 31 41  -73 47 48 G  0.80 0.47  1.10 1.10
    N    4                       0 34 24  -73 13 28 A
    N    5                       0 41 16  -72 45 48 E
    N    6                       0 41 29  -73 46 42 E
    N    7                       0 43 25  -72 38 19 A
    N    8                       0 43 13  -72 59 58 G  0.35 0.23
    N    9         9141.03655    0 43 36  -73  2 26 G  0.35 0.30  0.35 0.30
    N   10                       0 44 56  -73 10 11 B  0.38 0.37  0.35 0.35
    N   11                       0 45  2  -73 16 40 B  0.40 0.37  0.55 0.55
    N   12                       0 46  2  -73  5 37 B  6.58 3.80  7.30 3.90
    N  12A                       0 46 27  -73  6 17 B  1.87 1.88  1.80 1.80
    N  12B                       0 45 32  -73  4 54 B  2.07 1.68  1.60 1.40
    N  13A     248               0 45 26  -73 23  4 B  0.58 0.45  0.70 0.55
    N  13B     248 9141.03868    0 45 22  -73 22 28 G  0.98 0.70  0.70 0.60
    N   14                       0 46 17  -73 12 41 B  0.40 0.38  0.35 0.35
    N   15                       0 46 10  -73 25 34 B  0.45 0.45  0.50 0.50
    N   16                       0 46 18  -73 23 33 B  1.07 0.77  1.30 1.00
    N   17                       0 46 38  -73 31 42 B  3.18 3.12  2.80 2.80
    N   18                       0 47  4  -72 49 22 E
    N   19                       0 47 39  -73  8 15 B  5.18 6.98  7.20 7.20
    N   20                       0 47 48  -73 15 25 B             0.30 0.25
    N   21                       0 47 48  -73 17 32 B  0.72 0.60  1.00 0.80
    N   22                       0 48  2  -73 16 26 B  2.52 1.97  2.00 1.70
    N   23                       0 47 58  -73 17 40 B  0.93 0.68  0.80 0.80
    N   24                       0 48 10  -73 19 51 B  1.17 1.18  1.20 1.20
    N   25                       0 48  8  -73 14 16 B  0.80 0.75  0.85 0.85
    N   26                       0 48  8  -73 14 53 B             0.45 0.45
    N   27                       0 48 24  -73  5 56 B  0.85 0.57  1.00 1.00
    N   28                       0 48 34  -73 15 31 B  2.02 1.90  1.80 1.80
    N  28A                       0 48 31  -73 16  5 B  0.90 0.53  0.90 0.75
    N   29                       0 48 40  -72 58 11 E
    N   30                       0 49  0  -73  8 20 B  2.53 2.60  2.70 2.50
    N  30A                       0 48 57  -73  9 52 B  0.33 0.30  0.40 0.40
    N   31                       0 48 41  -73 26 16 E
    N   32                       0 49 41  -72 48 43 B  0.55 0.45  0.45 0.45
    N   33                       0 49 29  -73 26 33 B             0.30 0.25
    N   34                       0 49 46  -73 10 25 B             0.65 0.45
    N   35                       0 50 14  -72 32 25 B  0.58 0.82  1.10 0.45
    N   36                       0 50 24  -72 52 52 E  4.38 3.97
    N   37                       0 50 38  -72 47 44 B  5.32 4.85  6.10 3.90
    N   38                       0 49 40  -73 45 18 E
    N   39                       0 50 27  -72 59 14 E
    N   40                       0 50 40  -73 42 46 E
    N   41                       0 51  0  -72 53  4 B  0.35 0.28  0.35 0.35
    N   42                       0 51 38  -72 26  0 A
    N   43                       0 51  7  -73 57 37 A
    N   44                       0 51 56  -71 24 44 A
    N   45                       0 51 40  -73 13 35 B  0.60 0.52  0.75 0.75
    N   46                       0 51 47  -72 50 47 B  0.32 0.27  0.65 0.65
    N   47                       0 52  4  -73 20 51 E
    N   48                       0 52 18  -73 27  2 B  0.77 0.58  0.85 0.85
    N   49                       0 52 12  -73 36  3 B  0.27 0.25  0.30 0.25
    N   50                       0 52 45  -72 37 57 B  2.33 1.40  2.20 1.00
    N   51                       0 52 37  -73 26 16 B  0.90 0.63  1.00 1.00
    N  52A                       0 53 40  -72 39 29 B  0.32 0.27  0.50 0.50
    N  52B                       0 53 42  -72 39 12 B  0.40 0.32  0.50 0.50
    N   53         9138.00771    0 54  8  -71 34 45 G  0.38 0.35
    N   54                       0 56  5  -70 19 26 A
    N   55                       0 55 17  -72  3 11 A
    N   56                       0 55 15  -73 26  8 E
    N   57                       0 55 44  -72 15 39 B  0.58 0.58  1.20 1.20
    N   58                       0 56 17  -72 17 29 B  1.00 1.17  1.80 1.30
    N   59                       0 57  5  -73 33 57 B  1.47 1.35  1.20 1.20
    N   60                       0 57  6  -74 13 16 A
    N   61                       0 57 30  -72 32 24 B             0.25 0.25
    N   62                       0 57 56  -72 39 26 B  1.08 0.83  1.20 1.20
    N   63                       0 58 16  -72 38 50 B  0.58 0.45  0.60 0.60
    N   64                       0 58 24  -72 40  0 B  1.33 1.10  1.20 1.20
    N  64A                       0 58 27  -72 39 52 B  0.40 0.28  0.80 0.65
    N   65                       0 57 57  -71 48 37 A
    N   66     346               0 59  5  -72 10 37 B  9.73 8.18  8.50 8.50
    N  66A                       0 59 14  -72 11  1 B             0.55 0.55
    N  66B                       0 59 11  -72  9 57 B  0.45 0.32  0.75 0.75
    N  66C                       0 59 13  -72  9 27 B  0.32 0.18  0.40 0.30
    N  66D                       0 58 10  -72 11  1 E  0.53 0.18
    N   67                       0 58 37  -71 35 49 A  0.20 0.32
    N   68                       0 58 43  -72 27 16 A
    N   69                       0 59 15  -72 24 24 A  0.45 0.40  0.50 0.45
    N   70                       0 59 16  -72  1 58 A
    N   71                       1  0 58  -71 35 30 B  0.37 0.22  0.60 0.45
    N   72                       1  1 30  -71 50 47 B  0.43 0.28  0.50 0.40
    N   73                       1  4 39  -75 48 25 A
    N   74                       1  2 16  -71 51 26 B  0.88 0.58  1.20 0.70
    N   75                       1  2 28  -71 56 39 B  1.05 0.68  0.85 0.65
    N   76                       1  3 29  -72  3 24 B  4.30 5.37  4.20 3.80
    N  76A                       1  3 49  -72  3 53 B  0.43 0.25  0.35 0.35
    N  76B                       1  3  7  -72  6 26 B  0.52 0.37  0.65 0.65
    N  76C                       1  3 53  -72  8 23 B             0.40 0.40
    N  77A                       1  2 48  -71 53 19 B  0.48 0.32  0.55 0.55
    N  77B                       1  2 43  -71 53 32 B  0.32 0.32  0.45 0.45
    N   78                       1  5 23  -72  1 20 B  4.33 6.08  6.10 4.00
    N  78A                       1  5  5  -71 59  1 B  0.32 0.32  0.40 0.35
    N  78B                       1  5  5  -71 59 25 B  0.40 0.22  0.40 0.30
    N  78C                       1  5 41  -72  3 34 B  0.53 0.35  0.75 0.75
    N  78D                       1  5 11  -71 58 28 B  0.55 0.28  0.90 0.90
    N   79                       1  7 36  -72 34 47 B  0.30 0.13  0.30 0.30
    N   80                       1  8  9  -71 59 32 B  2.57 3.30  5.10 4.00
    N  80A                       1  8 27  -72  0 19 B  0.53 0.35  0.55 0.40
    N   81                       1  9 12  -73 11 42 B  0.50 0.48  0.80 0.65
    N   82         9142.01984    1 12 20  -73 51 26 G
    N   83                       1 13 48  -73 17 33 B  3.30 2.75  3.80 2.90
    N  83A     456 9142.02828    1 13 50  -73 18  0 G  0.53 0.40  0.60 0.45
    N  83B         9142.00666    1 13 52  -73 15 48 G  0.32 0.40  0.30 0.30
    N  83C                       1 14  2  -73 17  5 B  0.48 0.47  0.90 0.90
    N   84                       1 14 40  -73 18  9 HZ 3.30 5.92
    N  84A     460 9142.02806    1 14 38  -73 18 26 G  0.50 0.32  0.80 0.65
    N  84B         9142.02840    1 14 47  -73 19 46 G  0.35 0.25  0.35 0.35
    N  84C         9142.01416    1 14 17  -73 15 50 G  0.55 0.53  0.65 0.65
    N  84D                       1 14 45  -73 20 44 B  0.38 0.15  0.30 0.30
    N   85                       1 15 45  -73 20  0 E
    N   86         9142.02244    1 15 42  -73 10  0 G
    N   87         9142.02810    1 20 55  -73 14 45 G
    N   88         9142.02833    1 24  8  -73  9 40 G             0.40 0.35
    N   89                       1 25 44  -73 23  2 B  4.35 4.72  5.80 5.20
    N   90     602 9142.02831    1 29 33  -73 33 43 G  3.32 2.45  3.20 2.90



    NOTES:
    ======
    N 9 :  Lies 25" S of a bright star. [Henize].
    N10 :  Lies 25" SW of brt. star and 20" NE of fainter star.  [Henize].
    N13A:  N13A and N13B together = NGC 248.
    N13B:  See N13A.
    N18 :  Lies 20" NW of HD 4651 = CPD-73 47 (V,B-V = 9.78,0.46)
           spect. F3 Vp, foreground star.
    N22 :  Contains cluster NGC 267.
    N33 :  Lies 30" NE of brt. star and 20" NW of fainter star. [Henize].
    N39 :  Somewhat doubtful. [Henize].
    N47 :  Possibly NGC 294.  [Henize].
    N53 :  Probably SW member of close pair.
    N76 :  Contains cluster NGC 371.
    N78 :  Contains NGC 395 and IC 1624.
    N81 :  IC 1644.