uSHARPLESS 2-220
Ron Brecher
The energetic star Xi (ξ) Persei (lower right) fl u-
oresces gas in the California Nebula, NGC 1499,
in Perseus. Read Brecher’s feature article about
the Sharpless catalog on page 22 of this issue.
DETAILS:Takahashi FSQ-106 ED IV astrograph
with QHY367C CMOS camera. Total exposure:
121 / 3 hours through an Optolong L-eNhance fi lter.qSHARPLESS 2-236
Peter Jenkins
Open cluster NGC 1893 in Auriga is in the
process of slowly evaporating the surrounding
nebulosity of IC 410. The two dense areas at cen-
ter — often called the Tadpoles — likely conceal
ongoing star formation.
DETAILS:Offi cina Stellare Hiper APO 115 refractor
with Atik Horizon CMOS camera. Total exposure:
6 hours through narrowband and RGB fi lters.GALLERY
76 JUNE 2020 • SKY & TELESCOPE