MPEC 2023-M44 : COMET C/2023 H5 (Lemmon)
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M.P.E.C. 2023-M44 Issued 2023 June 19, 03:06 UT
The Minor Planet Electronic Circulars contain information on unusual
minor planets, routine data on comets and natural satellites,
and occasional editorial announcements. They are published
on behalf of Division F of the International Astronomical Union by the
Minor Planet Center, Smithsonian Astrophysical Observatory,
Cambridge, MA 02138, U.S.A.
Prepared using the Tamkin Foundation Computer Network
MPC@CFA.HARVARD.EDU
URL https://www.minorplanetcenter.net/ ISSN 1523-6714
COMET C/2023 H5 (Lemmon)
M. Tichy reports cometary activity of an asteroidal NEOCP candidate
(initially reported by Mt. Lemmon Survey - G96 on Apr. 19 UT) in follow-up
images taken on Apr. 21 from Klet Observatory-KLENOT (246), noting a condensed
5" coma. Prediscovery positions were reported back to Dec. 2022. Additional
reports of cometary features are as follows:
OC Date Reporter Coma Tail PA Exposures
F51 2023-03-27 R. Weryk 0".3 4x45s
T14 2023-06-12 R. Weryk 0".6 2" 140 3x60s
Observations:
CK23H050 C2022 12 01.61261310 42 21.236-21 44 45.74 22.10GVEM044F51
CK23H050 C2022 12 01.62293910 42 21.285-21 44 46.48 22.09GVEM044F51
CK23H050 C2022 12 01.63327910 42 21.312-21 44 47.21 22.18GVEM044F51
CK23H050 C2022 12 01.64360710 42 21.322-21 44 48.25 22.39GVEM044F51
CK23H050 C2023 01 20.54476310 34 26.631-21 34 49.09 21.13GVEM044F52
CK23H050 C2023 01 20.55683310 34 26.352-21 34 47.38 20.91GVEM044F52
CK23H050 C2023 01 20.58096010 34 25.820-21 34 44.70 21.33GVEM044F52
CK23H050 C2023 01 28.31477 10 31 24.51 -21 15 08.4 21.0 GVEM044G96
CK23H050 C2023 01 28.32004 10 31 24.43 -21 15 06.9 21.3 GVEM044G96
CK23H050 C2023 01 28.32529 10 31 24.27 -21 15 06.0 21.3 GVEM044G96
CK23H050 C2023 01 28.33054 10 31 24.09 -21 15 05.1 20.6 GVEM044G96
CK23H050 C2023 03 27.24969710 03 59.277-15 49 44.42 20.63wUEM044F51
CK23H050 C2023 03 27.26129310 03 58.981-15 49 39.07 20.61wUEM044F51
CK23H050 C2023 03 27.27289910 03 58.697-15 49 33.91 20.53wUEM044F51
CK23H050 C2023 03 27.28451410 03 58.409-15 49 28.55 20.47wUEM044F51
CK23H050*1C2023 04 19.18324709 56 38.922-12 53 18.31 20.29GVEM044G96
CK23H050 1C2023 04 19.18840509 56 38.861-12 53 15.97 20.09GVEM044G96
CK23H050 1C2023 04 19.19355309 56 38.803-12 53 13.49 20.27GVEM044G96
CK23H050 1C2023 04 19.19872409 56 38.738-12 53 11.33 20.32GVEM044G96
CK23H050 mC2023 04 19.25254309 56 37.970-12 52 46.20 20.40GVEM044I52
CK23H050 mC2023 04 19.26233509 56 37.860-12 52 42.50 20.81GVEM044I52
CK23H050 mC2023 04 19.27098209 56 37.690-12 52 38.10 VEM044I52
CK23H050 2C2023 04 19.86331209 56 29.867-12 48 07.43 19.9 GVEM044J04
CK23H050 2C2023 04 19.86772209 56 29.802-12 48 05.61 20.0 GVEM044J04
CK23H050 2C2023 04 19.87213409 56 29.744-12 48 03.59 20.4 GVEM044J04
CK23H050 |C2023 04 19.97608 09 56 28.41 -12 47 15.3 20.4 VuEM044807
CK23H050 |C2023 04 19.98103 09 56 28.28 -12 47 12.5 20.7 VuEM044807
CK23H050 |C2023 04 19.98595 09 56 28.25 -12 47 10.3 20.6 VuEM044807
CK23H050 KC2023 04 20.06447409 56 27.21 -12 46 35.9 20.6 VuEM044H21
CK23H050 KC2023 04 20.07007009 56 27.13 -12 46 33.5 20.6 VuEM044H21
CK23H050 KC2023 04 20.07566409 56 27.05 -12 46 31.0 20.6 VuEM044H21
CK23H050 1C2023 04 21.45821 09 56 09.47 -12 36 00.6 VEM044Q62
CK23H050 1C2023 04 21.46640 09 56 09.40 -12 35 57.1 20.0 GVEM044Q62
CK23H050 1C2023 04 21.80502409 56 05.370-12 33 25.20 VEM044246
CK23H050 1C2023 04 21.80871709 56 05.310-12 33 24.60 VEM044246
CK23H050 DC2023 05 04.14507 09 54 16.51 -11 02 52.8 20.6 GVEM044695
CK23H050 DC2023 05 04.15819 09 54 16.43 -11 02 47.2 20.7 GVEM044695
CK23H050 DC2023 05 04.17131 09 54 16.35 -11 02 41.8 20.4 GVEM044695
CK23H050 1C2023 05 24.14480209 54 13.727-08 52 05.12 VEM044G96
CK23H050 1C2023 05 24.15044309 54 13.745-08 52 03.07 20.07GVEM044G96
CK23H050 1C2023 05 24.15607909 54 13.799-08 52 00.48 20.12GVEM044G96
CK23H050 1C2023 05 24.16171609 54 13.820-08 51 58.25 20.10GVEM044G96
CK23H050 KC2023 05 24.75145 09 54 16.89 -08 48 27.9 20.6 VZEM044M49
CK23H050 KC2023 05 24.76566 09 54 16.98 -08 48 22.8 20.3 VZEM044M49
CK23H050 KC2023 05 24.77921 09 54 17.05 -08 48 17.9 20.4 VZEM044M49
CK23H050 KC2023 05 24.78832 09 54 17.09 -08 48 14.8 19.2 VZEM044M49
CK23H050 KC2023 05 24.79361 09 54 17.12 -08 48 12.8 18.8 VZEM044M49
CK23H050 KC2023 06 08.99865 09 56 33.62 -07 26 16.6 19.5 GVEM044X03
CK23H050 KC2023 06 09.01517 09 56 33.84 -07 26 11.9 19.2 GVEM044X03
CK23H050 KC2023 06 09.03958 09 56 34.10 -07 26 04.5 19.4 GVEM044X03
CK23H050 3C2023 06 12.26117709 57 16.349-07 10 44.83 19.99GVEM044T14
CK23H050 3C2023 06 12.26238509 57 16.366-07 10 44.49 19.98GVEM044T14
CK23H050 3C2023 06 12.26360409 57 16.382-07 10 44.13 20.02GVEM044T14
CK23H050 HC2023 06 12.77259 09 57 23.43 -07 08 22.0 20 GVEM044M21
CK23H050 KC2023 06 14.72488 09 57 51.64 -06 59 28.9 20.3 VZEM044M49
CK23H050 KC2023 06 14.73199 09 57 51.72 -06 59 26.8 20.1 VZEM044M49
CK23H050 KC2023 06 14.73909 09 57 51.81 -06 59 24.9 20.1 VZEM044M49
CK23H050 #C2023 06 15.77928 09 58 07.42 -06 54 47.8 20.4 rZEM044L81
CK23H050 #C2023 06 15.78936 09 58 07.60 -06 54 44.8 20.6 rZEM044L81
CK23H050 #C2023 06 15.79944 09 58 07.76 -06 54 42.1 20.4 rZEM044L81
Observer details:
246 Klet Observatory-KLENOT. Observers M. Tichy, J. Ticha, M. Janda, M.
Honkova. Measurer M. Tichy. 1.06-m f/2.7 Reflector + 2048x2048 CCD.
695 Kitt Peak. Observers C. Lejoly, J. V. Scotti. 2.3-m f/9 reflector + CCD.
807 Cerro Tololo Observatory, La Serena. Observers T. Linder, R. Holmes, L.
Horn. 0.61-m f/6.5 Dall-Kirkham Astrograph + CCD.
F51 Pan-STARRS 1, Haleakala. Observers J. Bulger, K. Chambers, T. Lowe, A.
Schultz, I. Smith. Measurers S. Chastel, J. Fairlamb, M. Huber, Y.
Ramanjooloo, R. Wainscoat, R. Weryk, K. Chambers, T. de Boer, H. Gao,
C.-C. Lin, E. Magnier. 1.8-m Ritchey-Chretien + CCD.
F52 Pan-STARRS 2, Haleakala. Observers J. Bulger, K. Chambers, T. Dukes, T.
Lowe, A. Schultz, I. Smith. Measurers S. Chastel, J. Fairlamb, M. Huber,
Y. Ramanjooloo, R. Wainscoat, R. Weryk. 1.8-m Ritchey-Chretien + CCD.
G96 Mt. Lemmon Survey. Observers A. Serrano, G. J. Leonard, J. B. Fazekas.
Measurers B. Gray, D. Rankin, F. C. Shelly, E. J. Christensen, D. Fay, J.
B. Fazekas, D. C. Fuls, A. R. Gibbs, A. D. Grauer, H. Groeller, J. K.
Hogan, R. A. Kowalski, S. M. Larson, G. J. Leonard, R. L. Seaman, A.
Serrano, K. W. Wierzchos. 1.5-m reflector + 10K CCD.
H21 Astronomical Research Observatory, Westfield. Observer R. Holmes.
Measurers T. Linder, R. Holmes, L. Horn. 0.76-m f/3.0 astrograph + CCD.
I52 Steward Observatory, Mt. Lemmon Station. Observer R. A. Kowalski.
Measurers E. J. Christensen, D. Fay, J. B. Fazekas, D. C. Fuls, A. R.
Gibbs, A. D. Grauer, H. Groeller, J. K. Hogan, R. A. Kowalski, S. M.
Larson, G. J. Leonard, D. Rankin, R. L. Seaman, A. Serrano, F. C. Shelly,
K. W. Wierzchos. 1.0-m prime focus + CCD.
J04 ESA Optical Ground Station, Tenerife. Observers D. Abreu, F. Ocana, M.
Micheli, L. Conversi. Measurers M. Micheli, F. Ocana, R. Kresken, M.
Busch, E. Schwab, A. Knofel. 1.0-m f/4.4 reflector + CCD.
L81 Skygems Namibia Remote Observatory. Observer D. De Martin. 0.51-m f/6.8
CDK + CCD.
M21 Schiaparelli Southern Observatory, Hakos. Observers A. Aletti, F.
Bellini, L. Buzzi, G. Galli. Measurer A. Aletti. 0.36-m f/8.4 reflector
+ CCD.
M49 IAS Remote Observatory, Hakos. Observers D. Husar, M. Junius, K. Meo.
Measurer D. Husar. 0.25-m f/4.6 reflector + CCD.
Q62 iTelescope Observatory, Siding Spring. Observer H. Sato. 0.43-m f/6.8
astrograph + CCD.
T14 Canada-France-Hawaii Telescope, Maunakea. Observers R. Wainscoat, C.
Cunningham, T. Burdullis. Measurers R. Weryk, R. Wainscoat. 3.6-m
Canada-France-Hawaii Telescope + CCD.
X03 Observatoire SADR, Poroto. Observers J. L. Virlichie, P. Traverse, H.
Roy, G. Houdin. Measurer P. Traverse. 0.35-m f/4.7 Newtonian reflector +
CCD.
Orbital elements:
C/2023 H5 (Lemmon)
Epoch 2023 Feb. 25.0 TT = JDT 2460000.5
T 2025 June 30.11305 TT Rudenko
q 4.3122276 (2000.0) P Q
z -0.0001326 Peri. 60.08640 -0.42532089 +0.83577119
+/-0.0000344 Node 159.47727 -0.07885560 -0.41645558
e 1.0005719 Incl. 97.89168 +0.90160076 +0.35784253
From 60 observations 2022 Dec. 1-2023 June 15, mean residual 0".1.
Ephemeris:
Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 m2
2023 05 20 09 53 57.2 -09 17 14 7.2425 7.4044 95.3 7.8 20.0
...
2023 06 04 09 55 37.1 -07 51 30 7.3970 7.3178 81.6 7.9 20.0
...
2023 06 12 09 57 12.8 -07 11 58 7.4779 7.2717 74.4 7.7 20.0
...
2023 06 18 09 58 42.3 -06 45 10 7.5362 7.2372 69.2 7.5 20.0
2023 06 19 09 58 58.6 -06 40 57 7.5456 7.2315 68.3 7.5 20.0
2023 06 20 09 59 15.3 -06 36 47 7.5550 7.2257 67.4 7.5 20.0
...
2023 06 26 10 01 03.2 -06 13 15 7.6089 7.1913 62.2 7.2 20.0
...
2023 07 04 10 03 46.2 -05 45 33 7.6742 7.1454 55.4 6.7 20.0
...
2023 07 19 10 09 42.9 -05 04 14 7.7709 7.0595 42.8 5.6 19.9
M. P. C. Staff (C) Copyright 2023 MPC M.P.E.C. 2023-M44
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