CCD Observation's detail view 3916

CometC/2015 V2 (Johnson)
Userchergen
User`s nameCarl Hergenrother
Observation's time (UT)2017-02-12 11:16:00
Observation's placeNot set
Comparison stars sourceICQ: U4. UCAC4 photometry catalog
MethodV
Magnitude12.2
Mag ErrorNot set
Coma diameter(')1.3
Tail's lengthNot set
Coma degree of condensationNot set
Positional angle of tail (°)Not set
Aperture51.0 cm
Telescope focal length (mm)3570
Telecope TypeC
Exposure of single frame (sec)60
Phot Regioncomparison stars are in the same frame as a comet
Software (with version)ICQ: IRA. IRAF
Stars ExposureNot set
Photometric-aperture size○ 1.3'
CameraFL9
ChipKA9
Chip blooming
Number of images3
Magnitude of the comparison star closest in brightnessNot set
Calibration methodsdark-subtracted (and bias-subtracted) + flat-field corrected (flat-fielded)
Pixel size width0.8"
Pixel size height0.8"
Light pollution zoneNot set
LmNot set
SQM-L in zenithNot set
Observatory code
CommentNot set