Comet46P/Wirtanen
UserMarco Goiato
User`s nameMarco Antonio Coelho Goiato
Observation's time (UT)2018-12-11 01:30:00
Tool4 x 50 B
Observation's placeAraçatuba
Magnitude4.2
Comparison stars sourceYG - Yale Bright Star Catalogue
MethodS - Sidgwick`s method
Coma diameter(')60
Tail's lengthNot set
Condensation4/
Positional angle of tailNot set
Bortl's scaleNot set
Aperture5 cm
Focal length (mm)Not set
Type of toolB - Binoculars
Magnification4
Field of view (°)Not set
SQM-L in zenith
Light pollution zoneGreen
Lm
CommentBy using 20 x 100 B and refletor 22 L 32 x: tail 30' in PA 55 ( in the reflector I could see 3 tails, in PA 15, 55 and 80 respectively)
Morris Format2018 Dec 11.06 UT: m1=4.2, Dia.=60', DC=4.5 ...5-cm B (4x) ...Marco Antonio Coelho Goiato (Araçatuba, Brazil)