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C/2025 A6 (Lemmon)

Perihelion distance : 0.53 AU
Inclination to ecliptic : 144 °
Orbital period : 1351 years
Eccentricity : 1

NASA/JPL elements
IAU/MPC elements


On 2025 Sep 29 04h55 UT by Nicolas Delaunoy


(Copyright Nicolas Delaunoy)

Coma Total magnitude (m1)7.5
Aperture radius for m10.45 '
Magnitude (MPC m2)10.8
Aperture radius for m26.2 "
Right ascension141.36733 °
Declination+39.16961 °
Instrumental configurationConfig1
InstrumentUNISTELLAR eQuinox2
Instrument typeNewton
Instrument aperture (0=naked eye)115 mm
Instrument focale length450 mm
FilterNone
CameraIMX347
SensorCMOS
Sensor size7.1x5.3 mm2
Sensor pixels number2088x1536
Binning1x1
MountALT-AZ
MotorizationYes
AutoguideNo
Exposure total time140 s
Exposure details35x4s
Sky transparency (naked eye max mag)3
Seeing3
Moon phase99 °
Moon elongation131 °
LocationYerres, 91330, France
Reference stars catalog (ast)UCAC-4
Used softwaresTycho tracker (master darks avec Siril)
Resulting picture sampling (scale)1.33 "/pix
Remarks or commentsPeu d'image car le jour se lève vite ! Pour la magnitude M1 c'est un essai...
Observation submission date2025 Sep 29 18h14m42s

(Record n° 30075)

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