12P/Pons-Brooks (Record n° 28336)
Orbital period : 71.00 years
NASA/JPL elements
IAU/MPC elements
On 2024 Mar 24 19h32 UT by Nicolas Biver
(Copyright Nicolas Biver)Coma Total magnitude (m1) 5.2 Aperture radius used for m1 4 ' Nuclear magnitude (m2) 8.6 Aperture radius used for m2 6 " Coma diameter 7.2 ' Coma condensation degree
(DC) 7 Tail length 0.45 ° Tail position angle
(PA) 32 ° Afrho 20900 cm Afrho error 200 cm r (dist/Sun) 0.941 AU d (dist/Earth) 1.618 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 8 °C Binning 2x2 Mount Dobson Motorization No Autoguide No Exposure total time 13.3 s Exposure details 33/8+39/10+21/4 s Sky transparency (naked eye max mag) 4 Seeing 2 Moon phase 0 ° Moon elongation 150 ° Air mass 3.3 Location Versailles Resulting picture sampling (scale) 2 "/pix Image processing binnig, flat, alignement, somme, retrait gradient Remarks or comments images RAW - Afrho sur couche rouge Observation submission date 2024 Mar 25 14h22m33s