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C/2017 O1 (ASASSN)

Orbital period : 6932.00 years

NASA/JPL elements
IAU/MPC elements


On 2017 Sep 21 03h17 UT by Nicolas Biver


(Copyright Nicolas Biver)

Coma Total magnitude (m1)10.2
Aperture radius used for m12.0 '
Coma diameter4 '
Coma condensation degree (DC)2
r (dist/Sun) 1.535 AU
d (dist/Earth) 0.839 AU
Right ascension04 11 14.2 h m s
Declination+24 57 42.0 ° ' "
Instrumental configurationConfig1
InstrumentDobson T407 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 A7S
SensorDC
Sensor size36x24 mm2
Sensor pixels number4240x2832
Binning2x2
MountDobson
MotorizationNo
AutoguideNo
Exposure total time20.9 s
Exposure details41x1/3+15x1/4+7x1/2s
Sky transparency (naked eye max mag)5
Seeing2
Moon phase180 °
Air mass1.2
LocationCrespières (78)
Reference stars catalogTycho-2
Used softwaresIRIS
Resulting picture sampling (scale)2.0 "/pix
Image processingsommes, retrait gradient, visu DDP
Remarks or commentsCrop partie centrale 30x20' Nord +- vers le haut
Observation submission date2017 Sep 21 16h59m33s

(Record n° 18263)

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