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221P/LINEAR -  (=P/2002 JN16 = P/2009 L1)

Photometric data obtained by use of FOCAS-II software

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

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

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

221P          06/07/2015 22:00:38  16.40  16.00  15.85  15.85  15.90  15.94  16.5  17.4  B96

221P          06/07/2015 22:00:38*  0.04   0.07   0.11   0.19   0.23   0.24     5   3.7  USN

221P          09/07/2015 21:45:22  16.42  16.05  15.88  15.79  15.81  15.81   7.9  16.9  B96

221P          09/07/2015 21:45:22*  0.05   0.08   0.12   0.11   0.09   0.13     5   3.9  USN

221P          01/08/2015 21:02:04  16.83  16.35  15.96  15.76  15.74  15.74   4.1  16.4  B96

221P          01/08/2015 21:02:04*  0.11   0.14   0.23   0.28   0.35   0.42     7   3.8  USN

221P          06/08/2015 20:45:48  16.77  16.39  16.16  16.16                 4.8  16.6  B96

221P          06/08/2015 20:45:48*  0.09   0.20   0.24   0.44                   5   4.4  USN

221P          22/08/2015 20:39:41  17.23  16.79  16.40  16.14  16.04  16.12   4.3  16.8  B96

221P          22/08/2015 20:39:41*  0.15   0.18   0.20   0.25   0.31   0.47     5   3.8  USN

221P          10/09/2015 20:29:37  17.68  16.99  16.93                        1.4  17.1  B96

221P          10/09/2015 20:29:37*  0.13   0.22   0.32                          5   3.6  USN

                                                                     AFRHO         LOG

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

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

221P          06/07/2015 22:00:38    0.86   1.76  32.00  15.97   17      9     1  0.955  B96

221P          09/07/2015 21:45:22    0.88   1.76  31.44  15.94    8     10     1  0.982  B96

221P          01/08/2015 21:02:04    1.03   1.77  26.83  16.13    4     11     3  1.048  B96

221P          06/08/2015 20:45:48    1.07   1.77  25.84  16.30    5     10     2  1.018  B96

221P          22/08/2015 20:39:41    1.21   1.80  22.84  16.64    4     10     2  1.000  B96

221P          10/09/2015 20:29:37    1.40   1.84  19.73  17.14    1      9     6  0.948  B96

 

IAUC 7907: COMET P/2002 JN_16 (LINEAR)

The discovery of an apparently asteroidal object was reported by the Lincoln Near Earth Asteroid Research (LINEAR) program (New Mexico, USA) on 2002 May 9.28. The magnitude was given as 18.0. Four additional images using the same telescope on that night revealed a stellar object of magnitude 18.2-18.7. It was assigned as comet C/2002 JN16. Periodicity of the comet is 6.49 years.

Recovery (apparation 2009): (IAUC 9051)

Leonid Elenin, Lyubertsy, Moscow region, Russia, recovered comet P/2002 JN16 as part of the ROCOT project. On June 1.40, he detected a diffuse object (~20.2m) with a small tail on 16 images obtained on 0.36-m f/3.8 Maksutov-Newtonian + ST-10XME (Tzec Maun observatory, Mayhill, NM, USA). The next day he requested confirmation of the recovery, and Michael Schwartz at Tenagra observatory imaged the comet on June 3 with 0.81-m f/7 Ritchey-Chretien + SITe. These images clearly show a tail at PA 248 degrees and length about 35". The correction to the predictions on MPC 56802 is Delta(T) = -0.2 day.