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C/2023 H2 (Lemmon)


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 m13.0 '
Nuclear magnitude (m2)14.4
Aperture radius used for m26 "
Coma diameter5.0 '
Coma condensation degree (DC)2
Tail length0.11 °
Tail position angle (PA)350 °
Afrho48 cm
Afrho error4 cm
r (dist/Sun) 0.931 AU
d (dist/Earth) 0.963 AU
Instrumental configurationConfig1
InstrumentDobson 407mm F/D 4.3
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 time105.2 s
Exposure details27x1.6s+31x2s
Sky transparency (naked eye max mag)5.5
Seeing3
Moon phase180 °
Moon elongation90 °
Air mass1.4
LocationBoulonville
Reference stars catalogAPASS
Used softwaresIRIS
Resulting picture sampling (scale)2 "/pix
Image processingbinning, flat, alignement, somme, retrait gradient
Remarks or commentscoma verte, Afrho sur couche rouge des 43.2s d'integration en mode RAW
Observation submission date2023 Oct 15 17h43m20s
Observation modification date2023 Oct 24 16h40m21s

(Record n° 27756)

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