C/2019 T4 (ATLAS) (Record n° 25249)
NASA/JPL elements
IAU/MPC elements
On 2022 Mar 08 00h30 UT by Nicolas Biver
(Copyright Nicolas Biver)Coma Total magnitude (m1) 12.1 Aperture radius used for m1 1 ' Nuclear magnitude (m2) 13.9 Aperture radius used for m2 6 " Coma diameter 1.5 ' Coma condensation degree
(DC) 6 Afrho 9000 cm Afrho error 1200 cm r (dist/Sun) 4.313 AU d (dist/Earth) 3.448 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 -2 °C Binning 2x2 Mount dobson sur table equatoriale JMI Motorization Yes Autoguide No Exposure total time 83.6 s Exposure details 21x1.5s+25x2s Sky transparency (naked eye max mag) 6 Seeing 2 Moon phase 135 ° Moon elongation 180 ° Air mass 3.9 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 Afrho sur couche R (AfrhoN&B=7200+-1050cm) Observation submission date 2022 Mar 08 18h54m10s