C/2023 A3 (Tsuchinshan-ATLAS) (Record n° 28900)
NASA/JPL elements
IAU/MPC elements
On 2024 Sep 29 04h53 UT by Nicolas Biver
(Copyright Nicolas Biver)Coma Total magnitude (m1) 2.4 Aperture radius used for m1 1.3 ' Nuclear magnitude (m2) 5.3 Aperture radius used for m2 5.5 " Coma diameter 1.9 ' Tail length 0.1 ° Afrho 68000 cm Afrho error 21000 cm r (dist/Sun) 0.393 AU d (dist/Earth) 0.853 AU Instrumental configuration Config1 Instrument Dobson 256mm F/D=4.95 Instrument type Newton Instrument aperture (0=naked eye) 256 mm Instrument focale length 1267 mm Instrument focale/diameter 4.94 Filter(s) None Camera SONY alpha7S Sensor DC Sensor size 36*24 mm2 Sensor pixels number 4240*2832 Sensor temperature 10 °C Binning 2x2 Mount Dobson Motorization No Autoguide No Exposure total time 10.2 s Exposure details 42x1/4s Sky transparency (naked eye max mag) 3 Seeing 2 Moon phase 150 ° Moon elongation 30 ° Air mass 16 Location Versailles Used softwares IRIS Resulting picture sampling (scale) 2.77 "/pix Image processing binning, flat, alignement comete, somme, retrait gradient Remarks or comments Images RAW, Afrho sur couche R.
Une seule étoile de référence (m=7.2), absorption différentielle appliquée Observation submission date 2024 Sep 29 18h43m37s