NGC 6791, Hot Subdwarfs and a Carbon Star (Vitali)

Celestial hemisphere: Northern · Constellation: Lyra (Lyr) · Contains: NGC 6791 · TYC3134-1549-1 · TYC3134-1700-1 · TYC3134-1787-1 · TYC3134-1847-1 · TYC3134-2098-1 · TYC3134-2257-1 · TYC3134-2258-1 · TYC3134-964-1

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NGC 6791, Hot Subdwarfs and a Carbon Star

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NGC 6791, Hot Subdwarfs and a Carbon Star

The sky area around a very old star cluster NGC6791 contains both hot subdwarfs and a carbon star. Hot subdwarfs are one of the hottest stars in the Universe with effective temperatures about 20000..40000K, the annotated revision B labels those hot blue dots. On the other hand carbon stars are one of the coldest: the U Lyr star at the upper right corner has an effective temperature about 2400K.

There is a faint reflection nebula Saloranta GN J1921.3+3743 at the lower left part of the image. Bortle 6 sky and a rather short integration time did not allow to properly reveal the nebula. It would make the image even more beautiful. I hope the weather will allow me to get more data for this interesting object.

Original
B
C
Final
D

B

Description: SIMBAD annotations.

Uploaded: ...

C

Description: Overstretched lumunance with a faint reflection nebula.

Uploaded: ...

D

Description: A bit more color saturation.

Uploaded: ...

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Status	Advanced success
Started	...
Astrometry.net job	4489567
PixInsight job	M6UEOBPP5BOCOQ0DXHHAF3TKUA04E5NK
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	19h20m54s.296
RA (top/left)	19h21m51s.550
RA (top/right)	19h19m57s.369
RA (bottom/right)	19h19m57s.309
RA (bottom/left)	19h21m51s.550

Dec (center)	+37°46′06″.52
Dec (top/left)	+37°54′46″.21
Dec (top/right)	+37°54′51″.50
Dec (bottom/right)	+37°37′24″.77
Dec (bottom/left)	+37°37′19″.96

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NGC 6791, Hot Subdwarfs and a Carbon Star

NGC 6791, Hot Subdwarfs and a Carbon Star

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NGC 6791, Hot Subdwarfs and a Carbon Star

NGC 6791, Hot Subdwarfs and a Carbon Star

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