Nebula in Vela
Gum 15


At about 3000 light-years, in the austral constellation Vela lays the Gum 15 nebula, a large ionized HII zone.

With a total integration time of 2 hours 15 minutes (27 x 5 minutes individual subframes) this image was taken in La Banderita Observatory, La Pampa, Argentina during June 2018.

The used equipment setup: Newton GSO 200 F4 with GPU Comma Corrector, Canon 600D/T3i modified and refrigerated (sensor measured and regulated temperature 0 -5°C), Astronomik CLS CCD filter, SkyWatcher NEQ6 mount, and homemade electronic focuser and anti-dew systems.

Technical data

Acquisition site La Banderita Observatory, La Pampa, Argentina
Acquisition date 6-13-2018
Instrument Newton GSO F4 200 with GPU coma corrector.
Mount Sky-Watcher NEQ6, managed by EQmod
Guide Off-Axis, with Lodestar camera
Camera Modified Canon 600D/T3i
No IR Filter (Full Spectrum mod, using Astronomik MC Clear)
Refrigerated (regulated temperature)
Camera sensor temperature -5°C (on-sensor measured and regulated)
Filter Astronomik Clip CLS CCD
Integration 27 subframes @ ISO 800, 5 minutes each (total integration time: 2 hours 15 minutes
Calibration 49 flats, 400 bias, 84 darks.
Resolution 1.1 arcsec/pixel
787 mm actual focal, 4.2 um x 4.2 um pixels
Native size (each tile) 5202 x 3465 pixels
Cropped size 5100 x 3310 pixels
FOV 1° 33.5' x 1° 0.7'
Image center coordinates RA: 08 h 44 min 47 sec
Dec: -41° 17'
Rotation: -175°
Acquisition Maxim DL
Process PixInsight 1.8