12P/Pons-Brooks (Record n° 28088)
Orbital period : 71.00 years
NASA/JPL elements
IAU/MPC elements
On 2024 Jan 20 18h20 UT by Nicolas Biver
(Copyright Nicolas Biver)Coma Total magnitude (m1) 8.7 Aperture radius used for m1 2.5 ' Nuclear magnitude (m2) 12.5 Aperture radius used for m2 6 " Coma diameter 4.8 ' Coma condensation degree
(DC) 5 r (dist/Sun) 1.752 AU d (dist/Earth) 2.044 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 Motorization No Autoguide No Exposure total time 51.9 s Exposure details 86x1/3+93x1/4s Sky transparency (naked eye max mag) 4 Seeing 3 Moon phase 65 ° Moon elongation 100 ° Air mass 2.0 Location Versailles Reference stars catalog APASS Used softwares IRIS Resulting picture sampling (scale) 2 "/pix Image processing binning, flat, alignement, alignement comète, somme, retrait gradient Observation submission date 2024 Jan 21 01h56m52s