67P/Churyumov-Gerasimenko (Record n° 25045)
Perihelion distance : 1.21 AU
Inclination to ecliptic : 4 °
Orbital period : 6.43 years
Eccentricity : 0.65
NASA/JPL elements
IAU/MPC elements
On 2022 Feb 09 03h14 UT by Nicolas Biver
(Copyright Nicolas Biver)Coma Total magnitude (m1) 10.7 Aperture radius for m1 3.0 ' Magnitude (MPC m2) 14.0 Aperture radius for m2 6 " Coma diameter 4.5 ' Coma condensation degree
(DC) 5 Tail length 0.47 ° Tail position angle
(PA) 281 ° Afrho 311 cm Afrho error 12 cm Afrho URL for more info https://lesia.obspm.fr/perso/nicolas-biver/COMETES/afrho-magnitudes.pdf 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 Filter 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 173.3 s Picture exposure details 19x3.2s+33x2.5s+15x2s Sky transparency (naked eye max mag) 6 Seeing 2 Moon phase 80 ° Moon elongation 180 ° Air mass 1.55 Location Boulonville Reference stars catalog (ast) APASS Used softwares IRIS Resulting picture sampling (scale) 2 "/pix Image processing binning,flat,alignement,somme,retrait gradient - images en jpg Remarks or comments magnitude mode N&B 16bits, Afrho couche R:
mR = 10.7, mV = 10.6
Afrho(N&B) = 269+-16 cm
Afrho(V) = 295+-21 cm Observation submission date 2022 Feb 11 12h05m59s Observation modification date 2022 Feb 17 14h22m49s