MPEC 2023-K122 : COMET C/2023 H2 (Lemmon)
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M.P.E.C. 2023-K122 Issued 2023 May 24, 04:23 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 H2 (Lemmon)
An object detected on 2023 Apr. 23 UT by Mount Lemmon Survey (G96) was
initially reported as an NEO candidate. Additional earlier detections where
later reported. It has subsequently been found to display cometary activity
as follows:
OC Date Reporter Coma Tail PA Exposures
G37 2023-05-14 Q.-Z. Ye 12"
G00 2023-05-21 M. Jaeger 8" 13x130s
Observations:
CK23H020 C2023 03 26.60908214 54 05.727+26 23 22.25 22.09GVEK122F51
CK23H020 C2023 03 26.61804914 54 05.134+26 23 35.66 21.97GVEK122F51
CK23H020 C2023 03 26.62701514 54 04.559+26 23 49.09 22.23GVEK122F51
CK23H020 C2023 04 18.42811314 19 35.595+36 10 23.81 21.62GVEK122F52
CK23H020 C2023 04 18.43975414 19 34.160+36 10 40.78 21.62GVEK122F52
CK23H020 C2023 04 18.45144114 19 32.744+36 10 57.83 20.89GVEK122F52
CK23H020 C2023 04 18.46316014 19 31.369+36 11 15.13 20.88GVEK122F52
CK23H020*1C2023 04 23.27971714 09 31.468+38 04 52.61 20.78GVEK122G96
CK23H020 1C2023 04 23.28403614 09 30.827+38 04 58.48 20.88GVEK122G96
CK23H020 1C2023 04 23.28836114 09 30.326+38 05 04.34 21.33GVEK122G96
CK23H020 1C2023 04 23.29274714 09 29.790+38 05 10.93 VEK122G96
CK23H020 1C2023 04 23.30088014 09 28.696+38 05 21.55 20.69GVEK122G96
CK23H020 1C2023 04 23.30301814 09 28.408+38 05 24.61 21.14GVEK122G96
CK23H020 1C2023 04 23.30512414 09 28.141+38 05 27.13 21.25GVEK122G96
CK23H020 KC2023 04 23.34475614 09 23.000+38 06 21.30 VEK122I52
CK23H020 KC2023 04 23.35215114 09 21.970+38 06 31.40 21.49GVEK122I52
CK23H020 KC2023 04 24.16794614 07 35.609+38 24 56.70 20.87GVEK122I52
CK23H020 KC2023 04 24.17072514 07 35.180+38 25 00.19 21.05GVEK122I52
CK23H020 KC2023 04 24.17350614 07 34.774+38 25 03.32 20.74GVEK122I52
CK23H020 KC2023 04 24.17736714 07 34.378+38 25 08.76 20.88GVEK122I52
CK23H020 KC2023 04 24.18208714 07 33.58 +38 25 15.3 20.8 VuEK122H21
CK23H020 KC2023 04 24.18768114 07 32.84 +38 25 22.8 21.0 VuEK122H21
CK23H020 KC2023 04 24.19066614 07 32.43 +38 25 27.1 21.0 VuEK122H21
CK23H020 1C2023 04 24.32234314 07 15.017+38 28 24.13 21.26GVEK122G96
CK23H020 1C2023 04 24.32756914 07 14.293+38 28 31.84 21.33GVEK122G96
CK23H020 1C2023 04 24.33280614 07 13.616+38 28 38.14 20.72GVEK122G96
CK23H020 1C2023 04 24.33803114 07 12.954+38 28 45.88 20.44GVEK122G96
CK23H020 KC2023 04 25.20570014 05 17.83 +38 48 00.3 20.6 GXEK122W62
CK23H020 KC2023 04 25.22359614 05 15.41 +38 48 23.6 20.1 GXEK122W62
CK23H020 KC2023 04 25.24121614 05 13.03 +38 48 47.1 20.6 GXEK122W62
CK23H020 1C2023 04 25.32241914 05 02.299+38 50 33.82 LEK122658
CK23H020 1C2023 04 25.32688714 05 01.697+38 50 39.32 LEK122658
CK23H020 1C2023 04 25.33135414 05 01.065+38 50 45.68 LEK122658
CK23H020 0C2023 04 26.38619 14 02 38.79 +39 13 42.1 VEK122U94
CK23H020 0C2023 04 26.39282 14 02 37.84 +39 13 50.5 VEK122U94
CK23H020 0C2023 04 26.39944 14 02 36.94 +39 13 58.9 20.5 GVEK122U94
CK23H020 !C2023 04 27.31402 14 00 32.14 +39 33 29.6 20.8 RVEK122673
CK23H020 !C2023 04 27.32269 14 00 30.97 +39 33 41.0 VEK122673
CK23H020 KC2023 04 28.00697513 58 56.44 +39 48 00.6 21.3 GVEK122L01
CK23H020 KC2023 04 28.00865413 58 56.19 +39 48 02.8 21.4 GVEK122L01
CK23H020 KC2023 04 28.01033313 58 56.06 +39 48 04.9 21.3 GVEK122L01
CK23H020 KC2023 04 28.01201313 58 55.78 +39 48 06.9 21.3 GVEK122L01
CK23H020 KC2023 04 28.01478613 58 55.38 +39 48 10.3 21.2 GVEK122L01
CK23H020 DC2023 05 06.13015 13 39 25.72 +42 21 00.0 21.5 GVEK122695
CK23H020 DC2023 05 06.13318 13 39 25.27 +42 21 03.0 21.3 GVEK122695
CK23H020 DC2023 05 06.13620 13 39 24.79 +42 21 06.1 21.4 GVEK122695
CK23H020 KC2023 05 09.90850 13 29 59.54 +43 20 20.4 21.2 GVEK122G00
CK23H020 KC2023 05 09.91280 13 29 58.92 +43 20 24.7 20.8 GVEK122G00
CK23H020 KC2023 05 09.91711 13 29 58.27 +43 20 27.1 20.6 GVEK122G00
CK23H020 KC2023 05 11.09750713 27 00.37 +43 37 21.9 20.2 GXEK122W62
CK23H020 KC2023 05 11.11717913 26 57.38 +43 37 38.5 19.9 GXEK122W62
CK23H020 KC2023 05 11.13843713 26 54.13 +43 37 56.4 19.9 GXEK122W62
CK23H020 :C2023 05 13.95248 13 19 49.26 +44 15 01.8 18.8 VqEK122950
CK23H020 :C2023 05 13.95939 13 19 48.23 +44 15 06.7 18.8 VqEK122950
CK23H020 :C2023 05 13.96287 13 19 47.73 +44 15 08.6 18.7 VqEK122950
CK23H020 KC2023 05 15.88590 13 14 58.26 +44 37 53.8 20.1 VqEK122A77
CK23H020 KC2023 05 15.90354 13 14 55.54 +44 38 04.6 19.9 VqEK122A77
CK23H020 KC2023 05 15.92117 13 14 52.83 +44 38 16.8 20.4 VqEK122A77
CK23H020 KC2023 05 16.01052 13 14 39.37 +44 39 16.4 20.7 GVEK122204
CK23H020 KC2023 05 18.12052 13 09 24.15 +45 01 43.3 19.5 RqEK122H36
CK23H020 KC2023 05 18.13448 13 09 22.10 +45 01 51.9 20.1 RqEK122H36
CK23H020 KC2023 05 18.14845 13 09 20.03 +45 02 01.3 19.8 RqEK122H36
CK23H020 KC2023 05 19.07497513 07 02.52 +45 11 05.0 20.2 GXEK122W62
CK23H020 KC2023 05 19.10119313 06 58.63 +45 11 19.7 19.9 GXEK122W62
CK23H020 KC2023 05 19.12706113 06 54.71 +45 11 34.5 20.1 GXEK122W62
CK23H020 KB2023 05 19.87327213 05 04.638+45 18 30.60 19.6 GXEK122B72
CK23H020 KB2023 05 19.89064913 05 02.123+45 18 40.16 20.1 GXEK122B72
CK23H020 KC2023 05 21.93043 13 00 03.89 +45 36 05.0 21.0 GVEK122G00
CK23H020 KC2023 05 21.93834 13 00 02.73 +45 36 09.4 21.1 GVEK122G00
CK23H020 KC2023 05 22.96427712 57 34.63 +45 44 05.2 20.3 GVEK122L06
CK23H020 KC2023 05 22.97447912 57 33.18 +45 44 10.1 20.5 GVEK122L06
Observer details:
204 Schiaparelli Observatory. Observer A. Aletti. Measurers A. Aletti, F.
Bellini. 0.36-m f/7.5 reflector + CCD.
658 National Research Council of Canada. Observers D. D. Balam, C. E. Spratt.
Measurers D. D. Balam, D. W. E. Green. 1.82-m Reflector + CCD.
673 Table Mountain Observatory, Wrightwood. Observer J. Pittichova. 1.0-m
f/15 reflector + CCD.
695 Kitt Peak. Observer C. Lejoly. 2.3-m f/9 reflector + CCD.
950 La Palma. Observer M. Masek. 0.25-m f/6.8 reflector + CCD.
A77 Observatoire Chante-Perdrix, Dauban. Observer F. Kugel. 0.40-m f/2.8
reflector + CCD.
B72 Soerth. Observer B. Koch. 0.36-m f/7.6 Schmidt-Cassegrain + CMO.
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. 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.
G00 AZM Martinsberg, Oed. Observers M. Jaeger, E. Prosperi, S. Prosperi.
Measurer M. Jaeger. 0.3-m f/4.0 reflector + CCD, 0.35-m f/4.2 reflector +
CCD.
G96 Mt. Lemmon Survey. Observer D. Rankin. 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. 1.5-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.
H36 Sandlot Observatory, Scranton. Observer G. Hug. .56 meter Reflector +
CCD.
I52 Steward Observatory, Mt. Lemmon Station. Observer A. Serrano. 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.
L01 Visnjan Observatory, Tican. Observer K. Korlevic. 1.0-m f/2.9 reflector
+ CCD.
L06 Sormano 2 Observatory, Bellagio Via Lattea. Observers E. Valli, G.
Ventre. Measurer P. Sicoli. 0.36m Schmidt Cassegrain + CCD.
U94 iTelescope Observatory, Beryl Junction (Sato). Observer H. Sato. 0.51-m
f/6.8 astrograph + CCD + f/4.5 focal reducer.
W62 Comet Hunter Observatory2, New Ringgold. Observer J. Maikner. 0.30-m
f/3.8 Riccardi-Honders + CCD.
Orbital elements:
C/2023 H2 (Lemmon)
Epoch 2023 Feb. 25.0 TT = JDT 2460000.5
T 2023 Oct. 29.17838 TT Rudenko
q 0.8944135 (2000.0) P Q
z +0.0040248 Peri. 150.64405 +0.57676636 +0.60276900
+/-0.0000113 Node 217.04125 +0.44782104 +0.33119919
e 0.9964002 Incl. 113.75075 +0.68322536 -0.72593156
From 71 observations 2023 Mar. 26-May 22, mean residual 0".4.
Ephemeris:
Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 m2
2023 04 24 14 07 57.5 +38 21 09 2.2296 2.9676 129.0 15.3 20.5
...
2023 05 09 13 32 16.5 +43 06 46 2.1909 2.7897 116.4 18.9 20.2
...
2023 05 17 13 12 11.4 +44 50 07 2.1970 2.6936 108.5 20.9 20.0
...
2023 05 23 12 57 29.8 +45 44 22 2.2105 2.6209 102.4 22.2 19.9
2023 05 24 12 55 06.9 +45 51 34 2.2133 2.6088 101.3 22.4 19.9
2023 05 25 12 52 45.4 +45 58 16 2.2163 2.5966 100.3 22.6 19.9
...
2023 05 31 12 39 11.8 +46 28 35 2.2365 2.5233 94.3 23.6 19.8
...
2023 06 08 12 23 00.6 +46 46 00 2.2674 2.4247 86.4 24.7 19.6
...
2023 06 23 11 59 30.7 +46 28 36 2.3236 2.2377 72.4 25.7 19.3
M. P. C. Staff (C) Copyright 2023 MPC M.P.E.C. 2023-K122
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