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3I/ATLAS


NASA/JPL elements
IAU/MPC elements


On 2025 Nov 26 06h00 UT by Nicolas Biver


(Copyright Nicolas Biver)

Coma Total magnitude (m1)10.6
Aperture radius used for m11.3 '
Nuclear magnitude (m2)12.9
Aperture radius used for m26 "
Coma diameter2 '
Coma condensation degree (DC)5
Afrho1983 cm
Afrho error98 cm
r (dist/Sun) 1.687 AU
d (dist/Earth) 1.970 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 temperature4 °C
Binning2x2
MountDobson
MotorizationNo
AutoguideNo
Exposure total time30.5 s
Exposure details67x1/4+55x1/4s
Sky transparency (naked eye max mag)4
Seeing3
Moon phase55 °
Moon elongation180 °
Air mass1.6
LocationVersailles
Reference stars catalogAPASS
Used softwaresIRIS
Resulting picture sampling (scale)2 "/pix
Image processingbinning, flat, alignement, retrait gradient, alignement comète...
Remarks or commentsentre nuages et lever du jour
Observation submission date2025 Nov 29 19h23m33s
Observation modification date2026 Jan 24 17h40m46s

(Record n° 30530)

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