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12P/Pons-Brooks

Orbital period : 71.00 years

NASA/JPL elements
IAU/MPC elements


On 2023 Nov 07 20h09 UT by Nicolas Biver


(Copyright Nicolas Biver)

Coma Total magnitude (m1)11.0
Aperture radius used for m12 '
Nuclear magnitude (m2)14.3
Aperture radius used for m26 "
Coma diameter2.7 '
Coma condensation degree (DC)5
Afrho2400 cm
Afrho error300 cm
r (dist/Sun) 2.680 AU
d (dist/Earth) 2.832 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 time116.2 s
Exposure details23x2+22x1.3+26x1.6s
Sky transparency (naked eye max mag)5.5
Seeing3
Moon phase90 °
Moon elongation180 °
Air mass2
LocationBoulonville
Reference stars catalogAPASS
Used softwaresIRIS
Resulting picture sampling (scale)2 "/pix
Image processingbinning, flat, alignement, somme, retrait gradient. Images RAW, Afrho couche R
Observation submission date2023 Nov 12 23h07m54s

(Record n° 27835)

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