
                   THE HENIZE CATALOGUE OF SMC EMISSION NEBULAE.

                   One file : SMC_NEB.txt

      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 = BSDO 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 BSDO 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

      Refer also to the complementary file of SMC clusters, SMC_CLUS.txt and
      associated Readme file (READSMC.txt), prep. by M. Morel, 2001 August 1

      Compiled by Mati Morel.           2001 August 18, 2012 January 27
      *********************************************************************
      *    Morel Astrographics : Stellar Data; Variable Stars; Charts     *
      *    mmorel7@bigpond.com                                            *
      *********************************************************************

                                                       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.

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