46P/Wirtanen (Record n° 20269)
Orbital period : 5.44 years
NASA/JPL elements
IAU/MPC elements
On 2018 Dec 12 00h20 UT by Nicolas Biver
(Copyright Nicolas Biver)Coma Total magnitude (m1) 4.8 Aperture radius used for m1 34 ' Nuclear magnitude (m2) 9.2 Aperture radius used for m2 39 " Coma diameter 66 ' Coma condensation degree
(DC) 3 r (dist/Sun) 1.055 AU d (dist/Earth) 0.082 AU Right ascension 03 24 54.0 h m s Declination +05 49 00 ° ' " Instrumental configuration Config2 Instrument Sony alpha 7s + 135mm F/D 2.5 sur monture minitrack Instrument type Camera lens Instrument aperture (0=naked eye) 54 mm Instrument focale length 135 mm Instrument focale/diameter 2.5 Filter(s) None Camera sony alpha 7s Sensor DC Sensor size 36x24 mm2 Sensor pixels number 4240x2832 Binning 2x2 Mount MINITRACK LX2 OMEGON Motorization Yes Autoguide No Exposure total time 200 s Exposure details 10x20s Sky transparency (naked eye max mag) 6 Observatory MPC code J86 Location iIRAM-30m Pico Veleta, Espagne Reference stars catalog Tycho-2 Used softwares IRIS Resulting picture sampling (scale) 25.9 "/pix Image processing retrait dark (images raw), alignement sur la comète et somme + retrait gradient.
visu DDP 5 Remarks or comments Crop 8.6x8.6° Observation submission date 2018 Dec 28 14h55m53s