• 03 11 01.321 +62 47 45.06 (simbad)
  centrale gaia-dr2 de mv=16.3 (ps1)
  découverte par Hartl & al en 1983
  distance= 660 pc / 2150 al [Corradi, 2003]
  distance.*c supposée= 1350-4400 pc / 4400-14350 al (gaia-dr2)
  vit.exp.= 13 km/s [Corradi, 2003]
  From visual inspection of the Palomar Observatory Sky Survey plates, Hartl & Weinberger (1987) suggested the existence of a large halo around the evolved PN Sharpless 2-200. We obtained deep CCD images with the Wide Field Camera of the 2.5-m INT telescope, highlighting the detailed structure of the nebula (Fig. 15). The inner nebula appears as a diffuse, low SB circle filled with a number of parallel straight lanes, and surrounded by a filamentary circular pattern of emission. With a SB about 10 times fainter, ex- tended emission is indeed found around the inner nebula. It has a roughly circular geometry (but the western side is much fainter than the eastern side) and a radius of ∼900 arcsec, or 2.6 pc for a dis- tance of 600 pc (Hartl & Weinberger 1987). The data available so far do not allow us to state whether it belongs to the PN, or is just ISM seen in projection or ionized by the PN. Both the inner nebula and the ‘halo’ show parallel stripes; most notably, they are directed perpendicularly to the Galactic plane, perhaps suggesting an action of the Galactic magnetic field in the shaping of the nebula and its halo (Dgani & Soker 1998). [Corradi, 2003]
  

Description de l'observation

• à 83x/OIII, moyenne à grande, faible, vue VI2/83x (avec OIII), observable de 50 à 182x, ovale, haltère, aux bords très flous, homogène, étoile centrale non-cherchée, plusieurs étoiles internes, OIII=3, avec l'amas Trumpler 3 à 30'N. [H=56°/78%]
  
  
• Appréciation visuelle: Objet difficilement discernable
• Apparaît laminaire