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C/2021 A1 (Leonard)


NASA/JPL elements
IAU/MPC elements


On 2021 Aug 02 21h16 UT by Nicolas Biver


(Copyright Nicolas Biver)

Coma Total magnitude (m1)15.7
Aperture radius used for m10.5 '
Nuclear magnitude (m2)17.1
Aperture radius used for m26 "
Coma diameter0.6 '
Coma condensation degree (DC)5
r (dist/Sun) 2.684 AU
d (dist/Earth) 3.440 AU
Right ascension10 36 27.6 h m s
Declination+45 48 48 ° ' "
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 size36x24 mm2
Sensor pixels number4240x2832
Sensor temperature10 °C
Binning2x2
MountDobson sur table équatoriale JMI
MotorizationYes
AutoguideNo
Exposure total time189 s
Exposure details5+12*4+30*3.2+10*4s
Sky transparency (naked eye max mag)6
Seeing2
Air mass3.5
LocationValdrome - Astrociel
Reference stars catalogAPASS
Used softwaresIRIS
Resulting picture sampling (scale)2 "/pix
Image processingbinning,flat,alignement,somme,retrait gradient
Observation submission date2021 Aug 19 17h04m58s

(Record n° 23833)

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