NGC 6572 – The Blue Racquetball

Sketch of NGC 6572 (The Blue Racquetball)

Sketch of NGC 6572 (The Blue Racquetball)
Click image for larger version.

Observation Notes:

NGC 6572 is a bright and colorful planetary nebula. At low power, it was nearly stellar, and strong blue-green in color. At 240X, it was slightly elongated at a PA of about 165 degrees (NNW-SSE). Although the Ultrablock filter increased contrast a bit, the nebula’s brightness made it unnecessary. I couldn’t detect the central star, even at 600X. The seeing could have been better (as usual), but during better moments, an uneven form emerged. I switched back and forth between the Pentax XW10 + 2X Barlow (240X) and 4 mm Orthoscopic (300X) to examine it further. The elongated core gave way to a rhomboid shape which gradually revealed the impression of fat swirls at the nebula’s north and south ends. The drawing below diagrams how the structure progressively unfolded.

Gradually revealed structure of NGC 6572

Gradually revealed structure of NGC 6572

NOAO Photo Comparison of NGC 6572 (The Blue Racquetball)

Sketch/NOAO Photo Comparison of NGC 6572
© Bruce Bodner/Adam Block/NOAO/AURA/NSF

Subject NGC 6572
Other Desig. AG+06 2201; BD+06 3649; EM* CDS 964; GC 4390; GCRV 10650; h 2000; HD 166802; IRAS 18096+0650; JCMTSE J181206.2+065114; JCMTSF J181206.2+065114; 2MASX J18120627+0651129; NSV 24329; NVSS J181206+065112; PK 34+11.1; PLX 4174.00; PN ARO 7; PN G034.6+11.8; PN VV 159; PN VV’ 370; PPM 165362; RAFGL 5206S; SCM 192; WB 1809+0650; Blue Racquetball
Classification Planetary Nebula (2a)
Position* Ophiuchus: [18 12 06.365 +06 51 13.01]
Size 16″ x 13″
Brightness* 8.1 vMag; 9.0 bMag
Date/Time SEP 07, 2010, 12:10 AM MST
(SEP 07, 2010, 0710 UT)
Observing Loc. Home – Flagstaff, Arizona, USA
Instrument SkyQuest XT8 (8 inch f/5.9 Dobsonian)
Eyepieces/Mag. Pentax XW10 + 2X Barlow (240X); UO 4 mm Orthoscopic (300X)
Conditions clear
Seeing 5/10 Pickering
Transparency SQM 20.3
*Sources SIMBAD; NOAO; NGC/IC Project

2 Replies to “NGC 6572 – The Blue Racquetball”

  1. Jeremy,
    I really enjoy your drawings and am learning from them. Thank you. One question, did you mean to say UO 4mm, not 5mm?
    Thank you again for sharing your work,

  2. Mike, you’re absolutely right, that should say 4 mm for the UO eyepiece. Thanks for noticing that! Just need to fix the sketch details and re-upload the image…

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