13P/Olbers (Record n° 28568)
Orbital period : 68.50 years
NASA/JPL elements
IAU/MPC elements
On 2024 Jun 24 21h53 UT by Nicolas Biver
(Copyright Nicolas Biver)Coma Total magnitude (m1) 7.0 Aperture radius used for m1 2.5 ' Nuclear magnitude (m2) 10.3 Aperture radius used for m2 6 " Coma diameter 5.2 ' Coma condensation degree
(DC) 6 Tail length 0.33 ° Tail position angle
(PA) 70 ° Afrho 11210 cm Afrho error 360 cm r (dist/Sun) 1.179 AU d (dist/Earth) 1.964 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 20 °C Binning 2x2 Mount dobson sur table equatoriale JMI Motorization Yes Autoguide No Exposure total time 69.1 s Exposure details 57x0.5+22x0.8+23x1.0s Sky transparency (naked eye max mag) 5 Seeing 2 Moon phase 10 ° Moon elongation 170 ° Air mass 4.1 Location Crespières Reference stars catalog APASS Used softwares IRIS Resulting picture sampling (scale) 2 "/pix Image processing binning, flat, alignement, alignement comète, somme, retrait gradient Remarks or comments magnitudes sur 49.1s en RAW, et Afrho sur couche R Observation submission date 2024 Jun 30 00h14m40s