BRIXIIS Astronomical Observatory

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image

Photometry

(FOCAS)

Afρ

astrometry

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20200115

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B96 (BRIXIIS)

20200119

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B96 (BRIXIIS)



























































































203P/KORLEVIC - P/2008 R4 - P/1999 WJ7

Photometric data obtained by use of FOCAS-II software



                                   10x10  20x20  30x30  40x40  50x50  60x60   SNR   SB   COD

OBJECT        DATE       TIME        +/-    +/-    +/-    +/-    +/-    +/-     N  FWHM  CAT

------------  ---------- --------  -----  -----  -----  -----  -----  -----  ----  ----  ---

203P          15/01/2020 22:57:47  18.07  17.66                               7.0  18.1  B96

203P          15/01/2020 22:57:47*  0.13   0.29                                 2   3.5  Gai

203P          19/01/2020 22:41:15  18.38  18.08  18.00                        6.5  18.0  B96

203P          19/01/2020 22:41:15*  0.22   0.30   0.13                          4   3.9  Gai



                                                                     AFRHO         LOG

COMET         UTC                   DELTA    r    BOX "   MAG   RSR    CM    +/-  AFRHO  OBS

------------  -------------------   -----  -----  -----  -----  ---  -----  ----  -----  ---

203P          Not enough boxes

203P          19/01/2020 22:41:15    2.57   3.21  10.71  18.34    7     30     5  1.480  B96



An apparently asteroidal 18th mag object discovered on 1999 November 28.94 by Korado Korlevic at Visnjan with a 0.41-m f/4.3 reflector + CCD was indicated on some of his December images to be possibly "fuzzy", and the cometary nature has been confirmed by C. Hergenrother and S. Larson, Lunar and Planetary Laboratory, who found a 13" coma elongated in p.a. 80 deg on a 600-s co-added R-band exposure taken on 2000 Feb. 7.25 UT with the 1.54-m Catalina reflector. The comet has a perihelion distance of 3.2 AU and a period of ten years. [IAUC 7368, 2000 February 18]


P/2008 R4 - Gareth Williams identified images of 1999 WJ7 in incidental astrometry taken with the 0.9-m Spacewatch telescope on September 3.24. The comet was 20th magnitude, with perihelion in 2010 February. The indicated correction to the prediction on MPC 59598 is Delta(T) = -0.3 day.