Hemisphere:  Southern  ·  Constellation: Carina (Car)  ·  Contains:  NGC 3372  ·  eta Car nebula
Getting plate-solving status, please wait...
The Keyhole in OIII, 


            Ian Parr
The Keyhole in OIII
Powered byPixInsight

The Keyhole in OIII

Technical card

Imaging telescopes or lenses: TeleVue 85 mm f/7 Refractor

Imaging cameras: QSI 690 wsg-8

Mounts: Paramount MyT

Guiding telescopes or lenses: TeleVue 85 mm f/7 Refractor

Guiding cameras: Starlight Xpress Lodestar X2

Software: PixInsight 1.8.5  ·  TheSkyX-Pro

Filters: Astronomik OIII 1.25" 12nm

Dates:March 3, 2018

Frames: 50x120"

Integration: 1.7 hours

Avg. Moon age: 16.36 days

Avg. Moon phase: 97.14%

Basic astrometry details

Astrometry.net job: 1950833

RA center: 10h 44' 24"

DEC center: -59° 51' 54"

Pixel scale: 1.611 arcsec/pixel

Orientation: 359.175 degrees

Field radius: 0.971 degrees

Resolution: 1824x2279

Locations: Home Balcony, Freshwater, NSW, Australia


While my surprisingly defective 127is goes back to the manufacturer for warranty repair I've dropped back to a my trusty Televue 85mm refractor. Half unguided/Half guided. Eventually I let TheSky auto-guide because the MS Spectre/Meltdown patch has still knocked out ASCOM. Without Sequence Generator running the dithering and Focus Boss running focus, more hands on than I would like. But I guess my sad and expensive affliction needs a scratch and tonight was clear(ish).
This is one of the most amazing objects in the entire sky and I love the way OIII knocks out most of the stars and fills the frame with soft textures and depth.


Sky plot

Sky plot


The Keyhole in OIII, 


            Ian Parr