46P/Wirtanen (Record n° 20138)
Perihelion distance : 1.06 AU
Inclination to ecliptic : 12 °
Orbital period : 5.44 years
Eccentricity : 0.66
NASA/JPL elements
IAU/MPC elements
On 2018 Dec 07 22h12 UT by Nicolas Biver
(Copyright Nicolas Biver)Coma Total magnitude (m1) 6.1 Aperture radius for m1 9.0 ' Magnitude (MPC m2) 11.7 Aperture radius for m2 6.0 " Coma diameter 18 ' Coma condensation degree
(DC) 4 r (dist/Sun) 1.058 AU d (dist/Earth) 0.096 AU Right ascension 45.2325 ° Declination -6.35556 ° Instrumental configuration Config1 Instrument Dobson 407 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 36x24 mm2 Sensor pixels number 4240x2832 Sensor temperature 5 °C Binning 2x2 Mount Dobson sur table equatoriale Motorization Yes Autoguide No Exposure total time 66 s Exposure details 33x2s Sky transparency (naked eye max mag) 6 Seeing 3 Moon phase 180 ° Air mass 2 Location Boulonville (limite 28/78) Reference stars catalog (ast) NOMAD Used softwares IRIS Resulting picture sampling (scale) 2.0 "/pix Image processing Alignement global, alignement sur noyau somme, retrait gradient Remarks or comments Photométrie sur la première série de 17 poses de 2s (étoiles moins bougées) Observation submission date 2018 Dec 09 16h12m24s