67P/Churyumov-Gerasimenko (Record n° 23837)
Orbital period : 6.42 years
NASA/JPL elements
IAU/MPC elements
On 2021 Aug 08 00h49 UT by Nicolas Biver
(Copyright Nicolas Biver)Coma Total magnitude (m1) 13.4 Aperture radius used for m1 0.7 ' Nuclear magnitude (m2) 14.6 Aperture radius used for m2 6 " Coma diameter 1.1 ' Coma condensation degree
(DC) 6 Tail length 0.07 ° Tail position angle
(PA) 250 ° r (dist/Sun) 1.595 AU d (dist/Earth) 0.978 AU Right ascension 01 54 05.35 h m s Declination +06 55 11 ° ' " Instrumental configuration Config1 Instrument Dobson 407mm 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 alpha7s Sensor DC Sensor size 36x24 mm2 Sensor pixels number 4240x2832 Sensor temperature 11 °C Binning 2x2 Mount Dobson sur table équatoriale JMI Motorization Yes Autoguide No Exposure total time 128 s Exposure details 12x3.2s+20x2.5s+10x4s Sky transparency (naked eye max mag) 6 Seeing 3 Moon phase 180 ° Moon elongation 110 ° Air mass 2.0 Location Valdrome - Astrociel Reference stars catalog APASS Used softwares IRIS Resulting picture sampling (scale) 2 "/pix Image processing binning,flat,alignement stellaire, alignement comète,somme,retrait gradient Observation submission date 2021 Aug 19 17h43m29s