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C/2025 A6 (Lemmon)

Orbital period : 1351.00 years

NASA/JPL elements
IAU/MPC elements


On 2025 Oct 24 18h33 UT by Nicolas Biver


(Copyright Nicolas Biver)

Coma Total magnitude (m1)4.3
Aperture radius used for m15 '
Nuclear magnitude (m2)8.1
Aperture radius used for m26 "
Coma diameter9.2 '
Coma condensation degree (DC)6
Tail length3 °
Tail position angle (PA)20 °
Afrho7735 cm
Afrho error391 cm
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 temperature10 °C
Binning2x2
MountDobson sur table equatoriale JMI
MotorizationYes
AutoguideNo
Exposure total time26 s
Exposure details20x1/4+21x1 s
Sky transparency (naked eye max mag)6
Seeing2
Moon phase180 °
Moon elongation90 °
Air mass2
LocationBlieux
Reference stars catalogAPASS
Used softwaresIRIS
Resulting picture sampling (scale)2 "/pix
Image processingbin flat alignement alignement comete somme retrait gradient
Remarks or commentsafrho couche R
Observation submission date2026 Jan 24 19h44m38s

(Record n° 30919)

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