12P/Pons-Brooks (Record n° 27634)
Orbital period : 71.00 years
NASA/JPL elements
IAU/MPC elements
On 2023 Sep 24 00h33 UT by Nicolas Biver
(Copyright Nicolas Biver)Coma Total magnitude (m1) 13.8 Aperture radius used for m1 1.3 ' Nuclear magnitude (m2) 15.2 Aperture radius used for m2 6 " Coma diameter 1.4 ' Coma condensation degree
(DC) 6 Afrho 1050 cm Afrho error 150 cm r (dist/Sun) 3.178 AU d (dist/Earth) 3.140 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 9 °C Mount dobson sur table equatoriale JMI Motorization Yes Autoguide No Exposure total time 147 s Exposure details 42x2.5s+21x2s Sky transparency (naked eye max mag) 5.5 Seeing 2 Moon phase 70 ° Moon elongation 100 ° Air mass 2 Location Boulonville Reference stars catalog APASS Used softwares IRIS Resulting picture sampling (scale) 2 "/pix Image processing binning, flat, alignement, somme, retrait gradient Remarks or comments Magnitude et Afrho (R) sur les 62.5s d'integration en RAW Observation submission date 2023 Sep 26 11h40m56s