3I/ATLAS (Record n° 29872)
NASA/JPL elements
IAU/MPC elements
On 2025 Jul 29 21h46 UT by Nicolas Biver
(Copyright Nicolas Biver)Coma Total magnitude (m1) 17.0 Aperture radius used for m1 0.17 ' Nuclear magnitude (m2) 17.2 Aperture radius used for m2 6 " Coma diameter 0.3 ' Coma condensation degree
(DC) 8 Afrho 150 cm Afrho error 40 cm r (dist/Sun) 3.590 AU d (dist/Earth) 2.856 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 13 °C Binning 2x2 Mount Dobson sur table equatoriale JMI Motorization Yes Autoguide No Exposure total time 234.6 s Exposure details 30x2.5s+32x2.0s+39x1.6s+11x3.2s Sky transparency (naked eye max mag) 6 Seeing 2 Moon phase 119 ° Moon elongation 68 ° 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 stellaire, retrait gradient, alignement cométaire 7 séries, somme; Crop 20x20' Remarks or comments Photométrie sur les 124.4s en mode RAW - afrho couche R Observation submission date 2025 Aug 02 23h38m35s Observation modification date 2025 Aug 04 19h50m38s