Hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)
FU Orionis forming star (HBC 722) and V1057 Cygni at Gulf area , 



    
        

            Antonio F. Sánchez
FU Orionis forming star (HBC 722) and V1057 Cygni at Gulf area
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Equipment

Imaging Telescopes Or Lenses
ASA N12 astrograph
Imaging Cameras
FLI ML8300
Mounts
ASA DDM85 S-XL
Filters
Optec 50mm B · Optec 50mm G · Optec 50mm R · Optec 50mm L
Accessories
FLI CFW-2-7 50mm round 7 position filter wheel

Acquisition details

Dates:
Aug. 2, 2013 ·  Aug. 4, 2013 ·  Aug. 6, 2013 ·  Sept. 2, 2013
Frames:
Optec 50mm B: 20x600" (3h 20') -25°C bin 1x1
Optec 50mm G: 15x600" (2h 30') bin 1x1
Optec 50mm L: 52x600" (8h 40') -25°C bin 1x1
Optec 50mm R: 17x600" (2h 50') -25°C bin 1x1
Integration:
17h 20'
Avg. Moon age:
27.19 days
Avg. Moon phase:
7.77%
Bortle Dark-Sky Scale:
2.00

Basic astrometry details

Astrometry.net job: 380221

RA center: 20h56m45s.4

DEC center: +43°5830

Pixel scale: 1.032 arcsec/pixel

Orientation: 179.838 degrees

Field radius: 0.578 degrees

Resolution: 620x469

Description



FU Orionis stars, commonly called FUOrs, are pre-main sequence stars in the early stages of stellar development. They have only just formed from clouds of dust and gas in interstellar space, which occur in active star- forming regions. They are all associated with reflection nebulae, which become visible as the star brightens.

In 1970 when the star now known as V1057 Cyg increased in brightness by 5.5 magnitudes over 390 days.¡.

Then, in August 2010, two new eruptive, pre-main sequence stars were discovered in Cygnus. The first object was an outburst of the star HBC 722. The object was reported to have risen by 3.3 magnitudes from May 13 to August 16, 2010. Spectroscopy reported by Ulisse Munari on August 23rd, support this object’s classification as an FU Ori star. Munari and his team reported the object at 14.04V on Aug 21, 2010.

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FU Orionis forming star (HBC 722) and V1057 Cygni at Gulf area , 



    
        

            Antonio F. Sánchez