3I/ATLAS (Record n° 29900)
NASA/JPL elements
IAU/MPC elements
On 2025 Jul 28 22h37 UT by Nicolas Biver
(Copyright Nicolas Biver)Coma Total magnitude (m1) 17.2 Aperture radius used for m1 0.2 ' Nuclear magnitude (m2) 17.4 Aperture radius used for m2 6 " Coma diameter 0.25 ' Coma condensation degree
(DC) 8 r (dist/Sun) 3.622 AU d (dist/Earth) 2.872 AU Instrumental configuration Config1 Instrument Dobson T407mm 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 14 °C Binning 2x2 Mount Dobson sur table equatoriale JMI Motorization Yes Autoguide No Exposure total time 160.7 s Exposure details 35x2.5s+37x2.0s+27x1.6s Sky transparency (naked eye max mag) 6 Seeing 3 Moon phase 129 ° Moon elongation 80 ° Air mass 2.3 Location Pradines, Lanuejols (30) - astrociel Reference stars catalog APASS Used softwares IRIS Resulting picture sampling (scale) 2 "/pix Image processing binning, flat, alignement, somme, retrait gradient, alignement et somme 6 séries Remarks or comments photométrie sur les 72s en mode RAW Observation submission date 2025 Aug 07 22h17m20s