C/2017 O1 (ASASSN) (Record n° 18263)
Orbital period : 6932.00 years
NASA/JPL elements
IAU/MPC elements
On 2017 Sep 21 03h17 UT by Nicolas Biver
(Copyright Nicolas Biver)Coma Total magnitude (m1) 10.2 Aperture radius used for m1 2.0 ' Coma diameter 4 ' Coma condensation degree
(DC) 2 r (dist/Sun) 1.535 AU d (dist/Earth) 0.839 AU Right ascension 04 11 14.2 h m s Declination +24 57 42.0 ° ' " Instrumental configuration Config1 Instrument Dobson T407 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 A7S Sensor DC Sensor size 36x24 mm2 Sensor pixels number 4240x2832 Binning 2x2 Mount Dobson Motorization No Autoguide No Exposure total time 20.9 s Exposure details 41x1/3+15x1/4+7x1/2s Sky transparency (naked eye max mag) 5 Seeing 2 Moon phase 180 ° Air mass 1.2 Location Crespières (78) Reference stars catalog Tycho-2 Used softwares IRIS Resulting picture sampling (scale) 2.0 "/pix Image processing sommes, retrait gradient, visu DDP Remarks or comments Crop partie centrale 30x20'
Nord +- vers le haut Observation submission date 2017 Sep 21 16h59m33s