12P/Pons-Brooks (Record n° 27800)
Perihelion distance : 0.78 AU
Inclination to ecliptic : 74 °
Orbital period : 71.7 years
Eccentricity : 0.95
NASA/JPL elements
IAU/MPC elements
On 2023 Nov 03 20h11 UT by Nicolas Biver
(Copyright Nicolas Biver)Coma Total magnitude (m1) 10.8 Aperture radius for m1 1.5 ' Magnitude (MPC m2) 13.0 Aperture radius for m2 6 " Coma diameter 2.5 ' Coma condensation degree
(DC) 7 Afrho 7500 cm Afrho error 170 cm r (dist/Sun) 2.727 AU d (dist/Earth) 2.866 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 8 °C Binning 2x2 Mount dobson sur table equatoriale JMI Motorization Yes Autoguide No Exposure total time 71.3 s Exposure details 3x2.5+6x2+3x1.6+32x1+20x1/2s Sky transparency (naked eye max mag) 5.5 Seeing 2 Moon phase 80 ° Moon elongation 90 ° Air mass 2 Location Boulonville Reference stars catalog (ast) APASS Used softwares IRIS Resulting picture sampling (scale) 2 "/pix Image processing binnig, flat, alignement, somme, retrait gradient Remarks or comments PSF~6" (vent+turbulence)
Magnitudes et Afrho sur 13.2s en RAW
Afrho couche R.
Halo vert de 2.5', coma poussière de 1.0' Observation submission date 2023 Nov 05 01h03m19s