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C/2021 A1 (Leonard)

Perihelion distance : 0.61 AU
Inclination to ecliptic : 133 °
Eccentricity : 1

NASA/JPL elements
IAU/MPC elements


On 2021 Nov 29 04h40 UT by Nicolas Biver


(Copyright Nicolas Biver)

Coma Total magnitude (m1)7.8
Aperture radius for m14.8 '
Magnitude (MPC m2)12.3
Aperture radius for m26 "
Coma diameter10 '
Coma condensation degree (DC)5
Tail length0.53 °
Tail position angle (PA)316 °
r (dist/Sun) 0.961 AU
d (dist/Earth) 0.593 AU
Right ascension196.92 °
Declination+30.91139 °
Instrumental configurationConfig1
InstrumentDobson T407
Instrument typeNewton
Instrument aperture (0=naked eye)407 mm
Instrument focale length1750 mm
FilterNone
CameraSony alpha7s
SensorDC
Sensor size36*24 mm2
Sensor pixels number4240*2832
Sensor temperature0 °C
Binning2x2
MountDobson sur table equatoriale JMI
MotorizationYes
AutoguideNo
Exposure total time93.2 s
Exposure details20*2.5s+27*1.6s
Sky transparency (naked eye max mag)5.5
Seeing3
Moon phase148 °
Moon elongation31 °
Air mass1.4
Locationboulonville
Reference stars catalog (ast)APASS
Used softwaresIRIS
Resulting picture sampling (scale)2 "/pix
Image processingbinning,flat,alignements,somme, retrait gradient (JPG)
Remarks or commentsCiel clair à cause de la lune. Couche V: mV=7.5 coma 11'
Observation submission date2021 Nov 30 18h28m08s

(Record n° 24475)

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