Soap Bubble Nebula in HOO with RGB stars (Miran Brezočnik)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: HD192744 · HD228412 · HD228461 · HD228462 · HD228483 · HD228521 · HD228522 · HD228543 · HD228549 · HD228551 · HD228575 · HD228599 · HD228618 · HD228623 · HD228666 · HD228690 · LBN 206

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Soap Bubble Nebula in HOO with RGB stars

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Soap Bubble Nebula in HOO with RGB stars

The Soap Bubble Nebula formed towards the end of its parent star's life cycle. The nebula is composed of dust and gases expelled by the central parent star.

The almost perfect round shape of the nebula is surprising. However, after measuring its eccentricity, I found that its shape closely resembles an ellipse with axes of 1 and approximately 0.93. The central parent star, from which the nebula emerged, shines very faintly with an apparent magnitude of 19.45 (please see reference [1] for details). To put this into perspective, the faint central star visible in the picture shines about 24 million times dimmer than the well-known star Spica in the constellation of Virgo, which is visible without optical aids. The distance to the nebula is approximately 4500 light years, and its size is 5 light years.

References:

[1] Acker, A.; et al. (Oktober 2012). "Discovery of New Faint Northern Galactic Planetary Nebulae". Revista Mexicana de Astronomía y Astrofísica. 48: 223–233.

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Status	Advanced success
Started	...
Astrometry.net job	8378187
PixInsight job	A0OA73J785I2ZG9Q9UL2ZZH2RVJF0VAM
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h15m22s.219
RA (top/left)	20h13m08s.545
RA (top/right)	20h15m11s.549
RA (bottom/right)	20h17m35s.373
RA (bottom/left)	20h15m32s.970

Dec (center)	+38°02′38″.63
Dec (top/left)	+38°05′56″.10
Dec (top/right)	+37°36′14″.69
Dec (bottom/right)	+37°59′12″.82
Dec (bottom/left)	+38°29′04″.41

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Soap Bubble Nebula in HOO with RGB stars

Soap Bubble Nebula in HOO with RGB stars

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Soap Bubble Nebula in HOO with RGB stars

Soap Bubble Nebula in HOO with RGB stars

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