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C/2021 A1 (Leonard)


NASA/JPL elements
IAU/MPC elements


On 2021 Oct 14 03h55 UT by Nicolas Biver


(Copyright Nicolas Biver)

Coma Total magnitude (m1)12.2
Aperture radius used for m11.2 '
Nuclear magnitude (m2)14.8
Aperture radius used for m26 "
Coma diameter2 '
Coma condensation degree (DC)5
Tail length0.05 °
Tail position angle (PA)340 °
r (dist/Sun) 1.665 AU
d (dist/Earth) 2.105 AU
Right ascension11 30 57.1 h m s
Declination+36 23 51 ° ' "
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 alpha 7s
SensorDC
Sensor size36*24 mm2
Sensor pixels number4240*2832
Sensor temperature3 °C
Binning2x2
MountDobson sur table equatoriale JMI
MotorizationYes
AutoguideNo
Exposure total time104.5 s
Exposure details10*2s+20*1.6s+21*2.5s
Sky transparency (naked eye max mag)5.5
Seeing2
Moon phase90 °
Moon elongation180 °
Air mass2.3
LocationBoulonville
Reference stars catalogAPASS
Used softwaresIRIS
Resulting picture sampling (scale)2 "/pix
Image processingbinning,flat,alignement,somme, retrait gradient
Observation submission date2021 Oct 15 18h54m13s

(Record n° 24179)

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