67P/Churyumov-Gerasimenko (Record n° 25044)
Orbital period : 6.42 years
NASA/JPL elements
IAU/MPC elements
On 2022 Feb 09 02h16 UT by Nicolas Biver
(Copyright Nicolas Biver)Coma Total magnitude (m1) 10.7 Aperture radius used for m1 2.3 ' Nuclear magnitude (m2) 14.0 Aperture radius used for m2 6 " Coma diameter 4.2 ' Coma condensation degree
(DC) 5 Tail length 0.43 ° Tail position angle
(PA) 281 ° Afrho 311 cm Afrho error 16 cm Afrho URL for more info conversion des magnitudes R r (dist/Sun) 1.691 AU d (dist/Earth) 0.730 AU 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 36*24 mm2 Sensor pixels number 4240*2832 Sensor temperature 1 °C Binning 2x2 Mount dobson sur table equatoriale JMI Motorization Yes Autoguide No Exposure total time 97.5 s Exposure details 39x2.5s Sky transparency (naked eye max mag) 6 Seeing 2 Moon phase 80 ° Moon elongation 180 ° Air mass 1.3 Location Boulonville Reference stars catalog APASS Used softwares IRIS Resulting picture sampling (scale) 2 "/pix Image processing binning,flat,alignement,somme,retrait gradient - images en RAW Remarks or comments magnitude mode N&B 16bits, Afrho couche R:
mR = 10.8,
Afrho(N&B) = 276+-11 cm Observation submission date 2022 Feb 11 11h57m43s