C/2023 H2 (Lemmon) (Record n° 27756)
NASA/JPL elements
IAU/MPC elements
On 2023 Oct 15 04h41 UT by Nicolas Biver
(Copyright Nicolas Biver)Coma Total magnitude (m1) 10.9 Aperture radius used for m1 3.0 ' Nuclear magnitude (m2) 14.4 Aperture radius used for m2 6 " Coma diameter 5.0 ' Coma condensation degree
(DC) 2 Tail length 0.11 ° Tail position angle
(PA) 350 ° Afrho 48 cm Afrho error 4 cm r (dist/Sun) 0.931 AU d (dist/Earth) 0.963 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 105.2 s Exposure details 27x1.6s+31x2s Sky transparency (naked eye max mag) 5.5 Seeing 3 Moon phase 180 ° Moon elongation 90 ° Air mass 1.4 Location Boulonville Reference stars catalog APASS Used softwares IRIS Resulting picture sampling (scale) 2 "/pix Image processing binning, flat, alignement, somme, retrait gradient Remarks or comments coma verte,
Afrho sur couche rouge des 43.2s d'integration en mode RAW Observation submission date 2023 Oct 15 17h43m20s Observation modification date 2023 Oct 24 16h40m21s