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21P/Giacobini-Zinner

Date of perihelion passage : 2018-9-10.2781
Perihelion distance : 1.012821 AU
Inclination to ecliptic : 31.9979 °
Orbital period : 6.57 years
Eccentricity : 0.710451

NASA/JPL elements, ephemeris and orbit diagram
IAU/MPC elements and ephemeris


On 2018 Sep 03 03h30 UT by Nicolas Biver


(Copyright Nicolas Biver)

Coma Total magnitude (m1)7.8
Aperture radius used for m13.0 '
Nuclear magnitude (m2)11.2
Aperture radius used for m26.0 "
Coma diameter6 '
Coma condensation degree (DC)5
Tail length0.2 °
Tail position angle (PA)270 °
r (dist/Sun) 1.018 AU
d (dist/Earth) 0.401 AU
Right ascension05 14 01.1 h m s
Declination+45 02 00 ° ' "
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
Sensor temperature11 °C
Binning2x2
Mountdobson
TrackingNo
AutoguideNo
Exposure total time11.5 s
Exposure details46x1/4s
Sky transparency (naked eye max mag)4.5
Seeing2
Moon phase90 °
Moon elongation25 °
Air mass1.5
LocationVersailles
Reference stars catalogGSC (HST)
Photometry|Astrometry softwareIRIS
Resulting picture sampling (scale)2.0 "/pix
Image processingalignement, somme, retrait gradient
Remarks or commentsm1=7.9 aux jumelles 7x50
Observation submission date2018 Sep 05 15h16m59s

(Record n° 19623)

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