C/2023 H2 (Lemmon) (Record n° 27799)
NASA/JPL elements
IAU/MPC elements
On 2023 Nov 03 20h01 UT by Nicolas Biver
(Copyright Nicolas Biver)Coma Total magnitude (m1) 8.2 Aperture radius used for m1 6.0 ' Nuclear magnitude (m2) 12.5 Aperture radius used for m2 10 " Coma diameter 9.5 ' Coma condensation degree
(DC) 2 Tail length 0.2 ° Tail position angle
(PA) 20 ° Afrho 102 cm Afrho error 18 cm r (dist/Sun) 0.899 AU d (dist/Earth) 0.348 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 8 °C Binning 2x2 Mount dobson sur table equatoriale JMI Motorization Yes Autoguide No Exposure total time 46 s Exposure details 38x1s+16x1/2s Sky transparency (naked eye max mag) 5.5 Seeing 1 Moon phase 80 ° Moon elongation 90 ° Air mass 2 Location Boulonville Reference stars catalog APASS Used softwares IRIS Resulting picture sampling (scale) 2 "/pix Image processing binnig, flat, alignement, somme, retrait gradient Remarks or comments PSF~16" (vent+turbulence)
Magnitudes et Afrho sur 19s en RAW
Afrho couche R Observation submission date 2023 Nov 05 00h56m26s