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COMET C/2023 H2 (LEMMON)

Photometric data obtained from FOCAS-II software

CATALOG: Gaia DR2 - BAND: G

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

COMET         UTC                    +/-    +/-    +/-    +/-    +/-    +/-     N  FWHM  CAT

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

C/2023 H2     06/11/2023 17:56:21  13.46  12.34  11.74  11.32  11.00  10.74  17.9  18.2  B96

C/2023 H2     06/11/2023 17:56:21*  0.09   0.08   0.08   0.08   0.07   0.07     3   3.2  Gai

C/2023 H2     07/11/2023 17:30:53  13.02  11.95  11.37  10.96  10.65  10.39  25.3  17.0  B96

C/2023 H2     07/11/2023 17:30:53*  0.01   0.01   0.01   0.01   0.01   0.01     2   3.1  Gai

                                                                     AFRHO         LOG

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

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

C/2023 H2     06/11/2023 17:56:21    0.25   0.91  111.67   9.77   18     60     3  1.775  B96

C/2023 H2     07/11/2023 17:30:53    0.23   0.91  121.78   9.34   25     75     3  1.877  B96

Af(rho) data according the CARA-approach is available via request to CARA-coordinator

http://cara.uai.it

Comet C/2023 H2 (LEMMON) (astro.vanbuitenen.nl)

Discovery:  [ CBET 5264:  COMET C/2023 H2 ]

An apparently asteroidal object discovered on CCD images obtained on Apr. 23 with the Mt. Lemm0n Survey 1.5-m reflector  has been found to show cometary activity by CCD astrometrists elsewhere after it was posted on the Minor Planet Center's PCCP webpage. R. Weryk, Department of Physics and Astronomy, University of Western Ontario, has identified pre-discovery images of this object in images obtained on Mar. 26.6 UT with the Pan-STARRS1 1.8-m Ritchey-Chretien reflector at Haleakala (at mag 21.9-22.2) and on Apr. 18.43-18.46 with the Pan-STARRS2 1.8-m Ritchey- Chretien reflector at Haleakala (at mag 20.9-21.6); conditions were too poor to ascertain any activity.  

OC   Date        Reporter           Coma    Tail    PA          Exposures

G37  2023-05-14  Q.-Z. Ye           12"

G00  2023-05-21  M. Jaeger           8"                          13x130s

MPEC 2023-K122: COMET C/2023 H2 (Lemmon)