C/2018 W2 (Africano) 2019-Aug-30 Nicolas Biver

Coma Total magnitude (m1) 10.9
Aperture radius used for m1 2.5 '
Nuclear magnitude (m2) 14.4
Aperture radius used for m2 6 "
Coma diameter 5 '
Coma condensation degree (DC) 5
r (dist/Sun) 1.458 AU
d (dist/Earth) 1.027 AU
Right ascension 03 24 39.2 h m s
Declination +55 42 57 ° ' "
Instrumental configuration Config1
Instrument Dobson T407mm F/D 4.3
Instrument type Newton
Instrument aperture (0=naked eye) 407 mm
Instrument focale length 1750 mm
Instrument focale/diameter 4.29
Filter(s) None
Camera Sony alpha 7s
Sensor DC
Sensor size 36x24 mm2
Sensor pixels number 4240x2832
Sensor temperature 9 °C
Binning 2x2
Mount Dobson sur Table equatoriale JMI
Tracking Yes
Autoguide No
Exposure total time 104 s
Exposure details 6x3+12x3+25x2s
Sky transparency (naked eye max mag) 6
Seeing 4
Moon phase 180 °
Air mass 1.0
Location Boulonville (28)
Reference stars catalog GSC (HST)
Photometry|Astrometry software IRIS
Resulting picture sampling (scale) 2 "/pix
Image processing alignement somme retrait gradient