C/2021 A1 (Leonard) (Record n° 23833)
NASA/JPL elements
IAU/MPC elements
On 2021 Aug 02 21h16 UT by Nicolas Biver
(Copyright Nicolas Biver)Coma Total magnitude (m1) 15.7 Aperture radius used for m1 0.5 ' Nuclear magnitude (m2) 17.1 Aperture radius used for m2 6 " Coma diameter 0.6 ' Coma condensation degree
(DC) 5 r (dist/Sun) 2.684 AU d (dist/Earth) 3.440 AU Right ascension 10 36 27.6 h m s Declination +45 48 48 ° ' " 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 36x24 mm2 Sensor pixels number 4240x2832 Sensor temperature 10 °C Binning 2x2 Mount Dobson sur table équatoriale JMI Motorization Yes Autoguide No Exposure total time 189 s Exposure details 5+12*4+30*3.2+10*4s Sky transparency (naked eye max mag) 6 Seeing 2 Air mass 3.5 Location Valdrome - Astrociel Reference stars catalog APASS Used softwares IRIS Resulting picture sampling (scale) 2 "/pix Image processing binning,flat,alignement,somme,retrait gradient Observation submission date 2021 Aug 19 17h04m58s