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C/2017 S3 (PANSTARRS)


NASA/JPL elements
IAU/MPC elements


On 2018 Jul 17 02h26 UT by Nicolas Biver


(Copyright Nicolas Biver)

Coma Total magnitude (m1)9.5
Aperture radius used for m12.0 '
Nuclear magnitude (m2)12.5
Aperture radius used for m24.0 "
Coma diameter4 '
Coma condensation degree (DC)5
r (dist/Sun) 0.899 AU
d (dist/Earth) 1.153 AU
Right ascension05 17 51.6 h m s
Declination+56 35 53 ° ' "
Instrumental configurationConfig1
InstrumentDobson 407 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 size36x24 mm2
Sensor pixels number4240x2832
Binning2x2
Mountdobson
MotorizationNo
AutoguideNo
Exposure total time22.8 s
Exposure details91x1/4s
Sky transparency (naked eye max mag)4.5
Seeing2
Moon phase124 °
Moon elongation90 °
Air mass1.7
LocationVersailles
Reference stars catalogTycho-2
Used softwaresIRIS
Resulting picture sampling (scale)2.0 "/pix
Image processingalignement, somme, retrait gradient
Remarks or commentsNord en PA~45° Entre les nuages, crépuscule (soleil -13°)
Observation submission date2018 Jul 17 12h05m33s

(Record n° 19344)

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