Astronomers estimate that the supernova explosion that produced the nebula occurred between 5,000 to 10,000 years ago.
Pickering’s Triangle was discovered in 1904 by Williamina Fleming of the Harvard Observatory while examining photographic plates of the area. The object was named in honor of her boss, astronomer Edward Charles Pickering, then director of the Observatory. Pickering’s Triangle goes by a number of aliases, including Pickering’s Wedge, Fleming’s Triangular Wisp, and Simeis 3-188. Current estimates place this supernova remnant at about 1800 light years from Earth.
The entire Veil Nebula complex, of which Pickering’s Triangle is but a portion has an apparent diameter of about 3° or nine full moons!
W.O FLT110 with dedicated TMB field flattener and Feather Touch 3'' focuser
SBIG ST10XME CFW9
Starizona MicroTouch autofocuser
Astrodon 5nm Ηα
320 min 32*10min subs (bin 1x1) under near full moon
Kallithea Athens Hellas