Hemisphere:  Northern
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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Technical card

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

Accessory: FLI CFW-2-7 50mm round 7 position filter wheel


Dates:Aug. 2, 2013Aug. 4, 2013Aug. 6, 2013Sept. 2, 2013

Frames:
Optec 50mm B: 20x600" -25C bin 1x1
Optec 50mm G: 15x600" bin 1x1
Optec 50mm L: 52x600" -25C bin 1x1
Optec 50mm R: 17x600" -25C bin 1x1

Integration: 17.3 hours

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: 20h 56' 45"

DEC center: +43° 58' 30"

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



    
        

            Antonio F. Sánchez