13P/Olbers (Record n° 28315)
Orbital period : 68.50 years
NASA/JPL elements
IAU/MPC elements
On 2024 Mar 14 20h14 UT by Nicolas Biver
(Copyright Nicolas Biver)Coma Total magnitude (m1) 11.5 Aperture radius used for m1 2.6 ' Nuclear magnitude (m2) 13.9 Aperture radius used for m2 6 " Coma diameter 2.5 ' Coma condensation degree
(DC) 7 Tail length 0.02 ° Tail position angle
(PA) 90 ° r (dist/Sun) 1.950 AU d (dist/Earth) 2.319 AU Instrumental configuration Config1 Instrument Dobson 407mm 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 alpha7S Sensor DC Sensor size 36*24 mm2 Sensor pixels number 4240*2832 Sensor temperature 9 °C Binning 2x2 Mount dobson sur table equatoriale JMI Motorization Yes Autoguide No Exposure total time 104.6 s Exposure details 29x1+16x2+31x1.6s Sky transparency (naked eye max mag) 5.5 Seeing 2 Moon phase 150 ° Moon elongation 12 ° Air mass 3 Location Boulonville Reference stars catalog APASS Used softwares IRIS Resulting picture sampling (scale) 2 "/pix Image processing binning, flat, alignement, alignement comète, somme, retrait gradient IRIS Remarks or comments Photométrie sur 55s RAW à 20h13.4 UT Observation submission date 2024 Mar 17 15h07m45s