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    NEW DISCOVERY: Drechsler 21 in Andromeda, 



    
        

            Marcel Drechsler
    NEW DISCOVERY: Drechsler 21 in Andromeda
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    NEW DISCOVERY: Drechsler 21 in Andromeda

    Technical card

    Dates:April 24, 2020

    Frames: 100x1200"

    Integration: 33.3 hours

    Avg. Moon age: 1.26 days

    Avg. Moon phase: 1.79%


    Basic astrometry details

    Astrometry.net job: 4213236

    RA center: 23h 23' 52"

    DEC center: +45° 16' 12"

    Pixel scale: 0.945 arcsec/pixel

    Orientation: 0.581 degrees

    Field radius: 0.441 degrees


    Resolution: 2640x2071

    Data source: Own remote observatory

    Remote source: Non-commercial independent facility

    Description

    Drechser 21 (PNG 107.1-14.8) is a new, and by a spectrum confirmed planetary nebula and was already discovered by me in May 2019. The PN has a size of about 8 arc min and is located in the constellation Andromeda.

    More information about Dr 21:
    http://planetarynebulae.net/FR/page_np.php?id=505

    ***

    Dr 21 was, as always, masterfully photographed by my friend, the Austrian astrophotographer Markus Blauensteiner at the Ursa Major Observatory (ROSA remote observatory southern alps).

    Interesting fact: In the south of Dr 21, but still within the nebula, Markus Blauensteiner and I discovered another potential PN, which is far behind Dr 21. Visually, however, it gives the impression that both PNs are connected. The second PN was named "DrBl 1" (PNG 107.1-14.9).

    More information about DrBl 1:
    http://planetarynebulae.net/FR/page_np.php?id=816

    ***

    Telscope & Camera:
    Lacerta N25010c Newtonian, f/D = 4
    SX Trius 694, Baader LRGB filter

    ***

    Exposure time:
    [OIII] 31x20 min / Ha 59x20 min / RGB 13x5 min per filter.
    33 h 15 min

    ***

    Photo: Markus Blauensteiner
    Image processing: Marcel Drechsler

    ***

    Dr 21 (PNG 107.1-14)
    Coordinates: 23:23:49.89 +45:16:54.43

    Comments

    Author

    Marcel_Drechsler
    Marcel Drechsler
    License: Attribution-NoDerivs Creative Commons
    153045
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    Revisions

    • Final
      NEW DISCOVERY: Drechsler 21 in Andromeda, 



    
        

            Marcel Drechsler
      Original
      NEW DISCOVERY: Drechsler 21 in Andromeda, 



    
        

            Marcel Drechsler
      B
      NEW DISCOVERY: Drechsler 21 in Andromeda, 



    
        

            Marcel Drechsler
      C
      NEW DISCOVERY: Drechsler 21 in Andromeda, 



    
        

            Marcel Drechsler
      D
      NEW DISCOVERY: Drechsler 21 in Andromeda, 



    
        

            Marcel Drechsler
      E
      NEW DISCOVERY: Drechsler 21 in Andromeda, 



    
        

            Marcel Drechsler
      F

    B

    Description: H-alpha

    C

    Description: OIII

    D

    Description: central white dwarf

    E

    Description: Spectrum

    F

    Description: Possible second PN "DrBl 1" in the south of Dr 21

    Sky plot

    Sky plot

    Histogram

    NEW DISCOVERY: Drechsler 21 in Andromeda, 



    
        

            Marcel Drechsler