C/2020 R4 (ATLAS) (Record n° 23308)
Orbital period : 974.10 years
NASA/JPL elements
IAU/MPC elements
On 2021 Apr 26 23h40 UT by Jean-Michel Vienney
(Copyright Jean-Michel Vienney)Spectrum .fit Download Spectrum picture sampling (scale) 0.456 Å/pix Spectrum resolution 539 dL/L r (dist/Sun) 1.369 AU d (dist/Earth) 0.473 AU Instrument SW D=250mm F/D=4 Instrument type Newton Instrument aperture (0=naked eye) 250 mm Instrument focale length 1000 mm Instrument focale/diameter 4 Filter(s) None Spectrometer Alpy Camera ATIK 640EX Sensor CCD Sensor size 12.5*2.3 mm2 Sensor pixels number 2750*500 Sensor temperature -10 °C Binning 1x1 Mount SW EQ6R Motorization Yes Autoguide Yes Exposure total time 4214 s Sky transparency (naked eye max mag) 3 Seeing 3 Moon phase 2 ° Moon elongation 45 ° Air mass 1.3 Location Buthiers 77760 France Used softwares ISIS Image processing Standard ISIS
Rep instrumentale sur HD136849 Observation submission date 2021 May 02 23h08m31s