C/2018 W2 (Africano) (Record n° 20849)
Perihelion distance : 1.46 AU
Inclination to ecliptic : 117 °
Eccentricity : 1
NASA/JPL elements
IAU/MPC elements
On 2019 Jul 30 01h34 UT by Nicolas Biver
(Copyright Nicolas Biver)Coma Total magnitude (m1) 11.6 Aperture radius for m1 1.6 ' Magnitude (MPC m2) 14.6 Aperture radius for m2 6.0 " Coma diameter 3.2 ' Coma condensation degree
(DC) 4 r (dist/Sun) 1.550 AU d (dist/Earth) 1.791 AU Right ascension 66.85292 ° Declination +59.08611 ° 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 Filter None Camera Sony Alpha 7s Sensor DC Sensor size 36*24 mm2 Sensor pixels number 4240*2832 Binning 2x2 Mount Dobson sur table equatoriale JMI Motorization Yes Autoguide No Exposure total time 93 s Exposure details 6+29*3sec Sky transparency (naked eye max mag) 6 Seeing 4 Moon phase 165 ° Air mass 1.5 Location Station de Valdrôme (26) Reference stars catalog (ast) GSC (HST) Used softwares IRIS Resulting picture sampling (scale) 2 "/pix Image processing alignement, somme, retrait gradient Observation submission date 2019 Aug 01 17h27m13s