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3I/ATLAS


NASA/JPL elements
IAU/MPC elements


On 2025 Jul 29 21h46 UT by Nicolas Biver


(Copyright Nicolas Biver)

Coma Total magnitude (m1)17.0
Aperture radius used for m10.17 '
Nuclear magnitude (m2)17.2
Aperture radius used for m26 "
Coma diameter0.3 '
Coma condensation degree (DC)8
Afrho150 cm
Afrho error40 cm
r (dist/Sun) 3.590 AU
d (dist/Earth) 2.856 AU
Instrumental configurationConfig1
InstrumentDobson T407mm
Instrument typeNewton
Instrument aperture (0=naked eye)407 mm
Instrument focale length1750 mm
Instrument focale/diameter4.29
Filter(s)None
CameraSony alpha7s
SensorDC
Sensor size36x24 mm2
Sensor pixels number4240x2832
Sensor temperature13 °C
Binning2x2
MountDobson sur table equatoriale JMI
MotorizationYes
AutoguideNo
Exposure total time234.6 s
Exposure details30x2.5s+32x2.0s+39x1.6s+11x3.2s
Sky transparency (naked eye max mag)6
Seeing2
Moon phase119 °
Moon elongation68 °
Air mass2.3
LocationPradines, Lanuejols (30) - astrociel
Reference stars catalogAPASS
Used softwaresIRIS
Resulting picture sampling (scale)2 "/pix
Image processingbinning, flat, alignement stellaire, retrait gradient, alignement cométaire 7 séries, somme; Crop 20x20'
Remarks or commentsPhotométrie sur les 124.4s en mode RAW - afrho couche R
Observation submission date2025 Aug 02 23h38m35s
Observation modification date2025 Aug 04 19h50m38s

(Record n° 29872)

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