67P/Churyumov-Gerasimenko (Record n° 23989)
Orbital period : 6.42 years
NASA/JPL elements
IAU/MPC elements
On 2021 Sep 17 02h11 UT by Nicolas Biver
(Copyright Nicolas Biver)Coma Total magnitude (m1) 11.2 Aperture radius used for m1 2.2 ' Nuclear magnitude (m2) 13.4 Aperture radius used for m2 6 " Coma diameter 4.0 ' Coma condensation degree
(DC) 6 Tail length 0.28 ° Tail position angle
(PA) 260 ° r (dist/Sun) 1.339 AU d (dist/Earth) 0.581 AU Right ascension 04 00 37.65 h m s Declination +17 41 37 ° ' " 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 Camera SONY alpha7S Sensor DC Sensor size 36*24 mm2 Sensor pixels number 4240*2832 Sensor temperature 12 °C Binning 2x2 Mount dobson sur table equatoriale JMI Motorization Yes Autoguide No Exposure total time 150.5 s Exposure details 6*4s+20*3.2s+25*2.5s Sky transparency (naked eye max mag) 6 Seeing 3 Moon phase 49 ° Moon elongation 116 ° Air mass 1.29 Location Boulonville Reference stars catalog APASS Used softwares IRIS Resulting picture sampling (scale) 2 "/pix Image processing binning, flat, alignement stellaire, alignement comète, somme, retrait gradient Remarks or comments couche verte: m1=11.1, Dia.=5.0' Observation submission date 2021 Sep 21 22h46m41s