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C/2023 H2 (Lemmon)


NASA/JPL elements
IAU/MPC elements


On 2023 Nov 07 19h50 UT by Nicolas Biver


(Copyright Nicolas Biver)

Coma Total magnitude (m1)7.3
Aperture radius used for m17.5 '
Nuclear magnitude (m2)12.9
Aperture radius used for m26 "
Coma diameter14 '
Coma condensation degree (DC)4
Tail length0.4 °
Tail position angle (PA)35 °
Afrho120 cm
Afrho error6 cm
r (dist/Sun) 0.909 AU
d (dist/Earth) 0.241 AU
Instrumental configurationConfig1
Instrument typeNewton
Instrument aperture (0=naked eye)407 mm
Instrument focale length1750 mm
Instrument focale/diameter4.29
Filter(s)None
CameraSONY alpha7S
SensorDC
Sensor size36*24 mm2
Sensor pixels number4240*2832
Sensor temperature8 °C
Binning2x2
Mountdobson sur table equatoriale JMI
MotorizationYes
AutoguideNo
Exposure total time89.2 s
Exposure details7x2+47x1.6s
Sky transparency (naked eye max mag)5
Seeing3
Moon phase90 °
Moon elongation100 °
Air mass2
LocationBoulonville
Reference stars catalogAPASS
Used softwaresIRIS
Resulting picture sampling (scale)2 "/pix
Image processingbininig, flat, alignement, alignement comète, somme, retrait gradient
Remarks or commentsphotométrie sur les 41.6s en mode RAW Afrho couche R, 35s RAW 2min plus tard (mêmes magnitudes)
Observation submission date2023 Nov 09 07h20m29s
Observation modification date2023 Nov 12 23h10m03s

(Record n° 27824)

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