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WeBo 1 (PN G135.6+01.0), a previously unrecognized planetary nebula with a remarkable thin-ring morphology, was discovered serendipitously on Digitized Sky Survey images in 1995. The central star is found to be a late-type giant with overabundances of carbon and s-process elements. The giant is chromospherically active and photometrically variable, with a probable period of 4.7 days; this suggests that the star is spotted, and that 4.7 days is its rotation period. We propose a scenario in which one component of a binary system became an asymptotic giant branch (AGB) star with a dense stellar wind enriched in C and s-process elements; a portion of the wind was accreted by the companion, contaminating its atmosphere and spinning up its rotation. The AGB star has now become a hot subdwarf, leaving the optical companion as a freshly contaminated barium star inside an ionized planetary nebula. - The Astronomical Journal - https://iopscience.iop.org/article/10.1086/344809 Webo 1 can be seen as a tiny blue object in the lower left hand corner of this image of IC1805. https://www.astrobin.com/962fgp/B/ Webo 1 is in the ESO archive database https://archive.eso.org/scienceportal/home?data_release_date=*:2022-12-13&pos=40.05987,61.15467&r=0.016667&fovcorners=40.428861,61.032740,39.590042,61.032742,39.586348,61.309548,40.432562,61.309546&sort=dist,-fov,-obs_date&s=P%2fDSS2%2fcolor&f=0.406245&fc=40.432562,61.309546&cs=J2000&av=true&ac=false&c=9,10,11,12,13,14,15,16,17,18,19,20&ta=RES&dts=true&at=40.00912390675186,61.17163914006043&sr=i |
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| @Gary Imm would you please take care of this? You are the Master of tiny objects, right?  Cheers Mike |
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Yes, Mike, maybe someday I will point the C11 in that direction and give it a try. I did post an image of it here:  WeBo 1 But it is not a high focal length image. |
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It is visible on my image too  https://www.astrobin.com/hjuwfz/ |
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Here's the little blighter. Not really in proper scale- acquired with TS65Q 420mm refractor, along with IC1805. |
