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21P/Giacobini-Zinner

Orbital period : 6.57 years

NASA/JPL elements
IAU/MPC elements


On 2018 Jul 19 00h24 UT by Nicolas Biver


(Copyright Nicolas Biver)

Coma Total magnitude (m1)9.8
Aperture radius used for m12.5 '
Nuclear magnitude (m2)12.5
Aperture radius used for m26.0 "
Coma diameter5.5 '
Coma condensation degree (DC)5
Tail length0.06 °
Tail position angle (PA)230 °
r (dist/Sun) 1.258 AU
d (dist/Earth) 0.695 AU
Right ascension22 26 54.3 h m s
Declination+60 05 47 ° ' "
Instrumental configurationConfig1
InstrumentDobson T407mm 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
MountDosbson sur table equatoriale JMI
TrackingYes
AutoguideNo
Exposure total time113 s
Exposure details38*2.5+2+3*5sec
Sky transparency (naked eye max mag)6
Seeing4
Moon phase100 °
Moon elongation115 °
Air mass1.1
LocationBoulonville (28)
Reference stars catalogGSC (HST)
Photometry|Astrometry softwareIRIS
Resulting picture sampling (scale)2.0 "/pix
Image processingalignement, somme, retrait gradient
Remarks or commentsComa verte de C2 de 5.5' magnitudes R/V/B (5')= 10.0/9.5/9.8
Observation submission date2018 Jul 20 16h05m00s

(Record n° 19364)

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