67P/Churyumov-Gerasimenko (Record n° 23966)
Orbital period : 6.42 years
NASA/JPL elements
IAU/MPC elements
On 2021 Sep 12 02h12 UT by Nicolas Biver
(Copyright Nicolas Biver)Coma Total magnitude (m1) 11.8 Aperture radius used for m1 1.0 ' Nuclear magnitude (m2) 13.3 Aperture radius used for m2 6.0 " Coma diameter 1.6 ' Coma condensation degree
(DC) 6 Tail length 0.1 ° Tail position angle
(PA) 257 ° r (dist/Sun) 1.366 AU d (dist/Earth) 0.617 AU Right ascension 03 41 36.0 h m s Declination +16 16 27 ° ' " Instrumental configuration Config1 Instrument Dobson T407mm F/D4.3 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 36*24 mm2 Sensor pixels number 4240*2832 Sensor temperature 13 °C Binning 2x2 Mount Table equatoriale JMI Motorization Yes Autoguide No Exposure total time 131.7 s Exposure details 2*3.2s+15*2.0s+33*1.6s+17*2.5s Sky transparency (naked eye max mag) 5.5 Seeing 3 Moon phase 70 ° Moon elongation 180 ° Air mass 1.3 Location Boulonville (28) Reference stars catalog APASS Used softwares IRIS Resulting picture sampling (scale) 2 "/pix Image processing binning,flat,alignement stellaire, alignemanet cométaire, somme Remarks or comments m(Vert) = 11.6, coma verte 2.5' plus étendue visible à la limite Observation submission date 2021 Sep 14 17h37m12s