add NGC5139 name from Edmond Halley

nebulae/default/names.dat

@@ -133,6 +133,7 @@
 #      - Huygens region, Gentil… (region names of Great Orion Nebula); http://www.astrosurf.com/patricio/DS/M42-topografia.htm
 #      - The Kite Cluster (NGC 1664); https://observing.skyhound.com/archives/dec/NGC_1664.html
 #      - NGC 3310 - Bow and Arrow Galaxy; http://astroa.physics.metu.edu.tr/~umk/ccd_wshop_adelman/Astronom/GALAXY/NGC3310.HTM
+#      - NGC 5139 - dorso Equino Nebula; (1714). An Account of Several Nebulae or Lucid Spots Like Clouds, Lately Discovered among the Fixt Stars by Help of the Telescope. Philosophical Transactions of the Royal Society of London, 29(338-350), 390–392. doi:10.1098/rstl.1714.0046
 #      - NGC 6559 - Chinese Dragon Nebula; https://noirlab.edu/public/images/gemini0509b/ https://skyandtelescope.org/astronomy-news/astro-image-in-the-newsdragon-in-the-sky/
 #      - Ced 19D - Electra Nebula; http://www.irida-observatory.org/CCD/VdB20_23/VdB20_23.html
 #      - IC 423 - Teardrop Nebula; Sky and Telescope February 2017 (2017S&T...133b..75A)
@@ -664,6 +665,7 @@ NGC  5128            _("Centaurus A") # NED, TSS, BCH, SG, WSO, WSG, PSA, DN, PA
 NGC  5128            _("The Hamburger Galaxy") # SG
 NGC  5139            _("ω Cen Cluster") # WK, OGSC, TSS, BCH, DWH, SG, PSA, DN, PAS, PGH, TLO, RNGCIC
 NGC  5139            _("Omega Centauri") # U2K
+NGC  5139            _("dorso Equino Nebula") # MISC
 NGC  5152            _("Fly's Wing Galaxy") # SGN
 NGC  5153            _("Fly's Wing Galaxy") # SGN
 NGC  5189            _("Spiral Planetary Nebula") # TSS, SG, TLO