[Iaude] MPEC X225: COMET C/2023 X1 (Leonard)
mpec at marsden.cfa.harvard.edu
mpec at marsden.cfa.harvard.edu
Mon Dec 11 21:44:35 EST 2023
M.P.E.C. 2023-X225 Issued 2023 December 12, 02:37 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 at CFA.HARVARD.EDU
URL https://www.minorplanetcenter.net/ ISSN 1523-6714
COMET C/2023 X1 (Leonard)
G. J. Leonard reports the discovery of a comet in four 30-second survey
images taken on Dec. 4 UT by Catalina Sky Survey (703), noting a condensed 8"
coma. Additional reports of cometary features are as follows:
OC Date Reporter Coma Tail PA Exposures
T03 2023-12-05 A. Hale 72"
U94 2023-12-06 H. Sato 120" 23x60s
204 2022-12-06 A. Aletti 25"
L06 2023-12-07 P. Sicoli 102"
V21 2023-12-07 D. T. Durig 30" 120x30s
P87 2023-12-07 K. Yoshimoto 100" 48x30s
J95 2023-12-08 P. Birtwhistle 8" 145x12s
G40 2023-12-08 N. Paul 80" 26x50s
D88 2023-12-08 Y. Sugiyama 72"
Observations:
CK23X010*1C2023 12 04.44005212 39 03.859+18 23 33.94 17.38GVEX225703
CK23X010 1C2023 12 04.44205112 39 04.140+18 23 43.19 17.61GVEX225703
CK23X010 1C2023 12 04.44404912 39 04.316+18 23 51.00 17.24GVEX225703
CK23X010 1C2023 12 04.44605412 39 04.414+18 23 59.60 17.73GVEX225703
CK23X010 mC2023 12 04.53083012 39 13.892+18 30 12.13 18.77GVEX225I52
CK23X010 mC2023 12 04.53458112 39 14.339+18 30 28.37 18.67GVEX225I52
CK23X010 mC2023 12 04.53888812 39 14.796+18 30 47.92 18.12GVEX225I52
CK23X010 mC2023 12 04.54277512 39 15.221+18 31 04.40 18.47GVEX225I52
CK23X010 KC2023 12 05.47098 12 41 01.24 +19 39 26.5 18.2 GVEX225V21
CK23X010 KC2023 12 05.48876 12 41 03.26 +19 40 46.3 18.1 GVEX225V21
CK23X010 KC2023 12 05.49587 12 41 04.05 +19 41 18.3 18.3 GVEX225V21
CK23X010 1C2023 12 05.49589212 41 04.002+19 41 17.81 17.22GVEX225703
CK23X010 1C2023 12 05.49823812 41 04.276+19 41 28.03 17.77GVEX225703
CK23X010 1C2023 12 05.50058312 41 04.535+19 41 38.76 17.30GVEX225703
CK23X010 1C2023 12 05.50292312 41 04.891+19 41 49.09 17.57GVEX225703
CK23X010 KC2023 12 05.50298 12 41 04.84 +19 41 49.7 18.2 GVEX225V21
CK23X010 KC2023 12 05.51009 12 41 05.64 +19 42 21.7 18.1 GVEX225V21
CK23X010 KC2023 12 05.51720 12 41 06.43 +19 42 53.4 18.0 GVEX225V21
CK23X010 KC2023 12 05.52189712 41 07.001+19 43 14.63 18.30GVEX225I52
CK23X010 KC2023 12 05.52431 12 41 07.26 +19 43 25.3 18.0 GVEX225V21
CK23X010 KC2023 12 05.53142 12 41 08.06 +19 43 57.8 18.1 GVEX225V21
CK23X010 KC2023 12 05.53392512 41 08.340+19 44 08.27 18.31GVEX225I52
CK23X010 KC2023 12 05.53546812 41 08.549+19 44 15.22 18.29GVEX225I52
CK23X010 KC2023 12 05.53701012 41 08.711+19 44 22.24 18.38GVEX225I52
CK23X010 C2023 12 05.58489 12 41 14.42 +19 47 56.8 17.9 GVEX225T03
CK23X010 C2023 12 05.58701 12 41 14.69 +19 48 06.2 17.9 GVEX225T03
CK23X010 C2023 12 05.58917 12 41 14.86 +19 48 17.3 18.3 GVEX225T03
CK23X010 KC2023 12 06.16216 12 42 21.23 +20 31 12.7 18.3 GVEX225204
CK23X010 KC2023 12 06.18056 12 42 23.34 +20 32 36.2 VEX225204
CK23X010 KC2023 12 06.19809 12 42 25.38 +20 33 55.9 VEX225204
CK23X010 8C2023 12 06.46779 12 42 57.20 +20 54 21.5 16.7 TqEX225U94
CK23X010 8C2023 12 06.47076 12 42 57.46 +20 54 34.2 19.5 VqEX225U94
CK23X010 8C2023 12 06.47329 12 42 57.79 +20 54 45.3 18.8 VqEX225U94
CK23X010 mC2023 12 06.50543912 43 01.484+20 57 14.33 18.69GVEX225I52
CK23X010 mC2023 12 06.50741112 43 01.726+20 57 23.22 18.46GVEX225I52
CK23X010 mC2023 12 06.50839312 43 01.859+20 57 27.83 18.78GVEX225I52
CK23X010 C2023 12 06.51862 12 43 02.92 +20 58 14.2 18.4 GVEX225V38
CK23X010 C2023 12 06.52074 12 43 03.19 +20 58 24.3 18.1 GVEX225V38
CK23X010 0C2023 12 06.52230 12 43 03.46 +20 58 30.1 VEX225U94
CK23X010 C2023 12 06.52286 12 43 03.48 +20 58 36.0 18.2 GVEX225V38
CK23X010 0C2023 12 06.52890 12 43 04.19 +20 59 00.9 VEX225U94
CK23X010 0C2023 12 06.53595 12 43 05.03 +20 59 32.8 14.7 GVEX225U94
CK23X010 KC2023 12 07.13615 12 44 16.09 +21 45 27.4 18.3 V EX225A77
CK23X010 KC2023 12 07.14347 12 44 16.97 +21 46 01.2 18.4 V EX225A77
CK23X010 KC2023 12 07.15076 12 44 17.82 +21 46 35.1 18.3 V EX225A77
CK23X010 KC2023 12 07.17798812 44 20.99 +21 48 41.4 18.5 GUEX225L06
CK23X010 KC2023 12 07.18849912 44 22.19 +21 49 29.3 19.0 GUEX225L06
CK23X010 KC2023 12 07.19900912 44 23.46 +21 50 18.9 18.9 GUEX225L06
CK23X010 KC2023 12 07.46206012 44 55.12 +22 10 38.4 17.2 GXEX225858
CK23X010 KC2023 12 07.47941212 44 57.16 +22 12 00.0 17.3 GXEX225858
CK23X010 KC2023 12 07.49638812 44 59.16 +22 13 19.3 17.4 GXEX225858
CK23X010 KC2023 12 07.50556 12 45 00.23 +22 14 00.6 18.8 GVEX225V21
CK23X010 1C2023 12 07.51217512 45 01.084+22 14 32.82 17.47GVEX225703
CK23X010 1C2023 12 07.51423512 45 01.267+22 14 43.26 17.86GVEX225703
CK23X010 1C2023 12 07.51629412 45 01.555+22 14 52.08 18.26GVEX225703
CK23X010 1C2023 12 07.51835212 45 01.760+22 15 01.22 18.15GVEX225703
CK23X010 KC2023 12 07.52705 12 45 02.74 +22 15 41.1 18.7 GVEX225V21
CK23X010 KC2023 12 07.80523 12 45 36.35 +22 37 20.1 14.8 TVEX225P87
CK23X010 KC2023 12 07.81302 12 45 37.31 +22 37 57.0 VEX225P87
CK23X010 KC2023 12 07.82103 12 45 38.35 +22 38 34.1 VEX225P87
CK23X010 C2023 12 07.93810 12 45 52.44 +22 47 42.4 18.5 RoEX225C94
CK23X010 C2023 12 07.94127 12 45 52.53 +22 47 54.3 17.8 RoEX225C94
CK23X010 C2023 12 07.96749 12 45 56.12 +22 50 04.6 17.1 RoEX225C94
CK23X010 C2023 12 07.97380 12 45 56.49 +22 50 25.6 18.2 RoEX225C94
CK23X010 KC2023 12 08.06839212 46 08.20 +22 57 52.9 19.3 GVEX225L01
CK23X010 KC2023 12 08.07007512 46 08.38 +22 58 01.0 19.2 GVEX225L01
CK23X010 KC2023 12 08.07343812 46 08.78 +22 58 17.1 19.3 GVEX225L01
CK23X010 KC2023 12 08.07511912 46 08.99 +22 58 25.0 19.5 GVEX225L01
CK23X010 KC2023 12 08.07680412 46 09.20 +22 58 32.9 19.4 GVEX225L01
CK23X010 KC2023 12 08.17176512 46 20.647+23 06 00.22 18.5 GVEX225J95
CK23X010 KC2023 12 08.17969112 46 21.610+23 06 37.66 18.6 GVEX225J95
CK23X010 KC2023 12 08.18850012 46 22.699+23 07 18.88 18.7 GVEX225J95
CK23X010 :C2023 12 08.22038 12 46 26.77 +23 09 51.9 18.1 VqEX225950
CK23X010 2C2023 12 08.23537 12 46 28.543+23 11 03.01 17.8 GVEX225G40
CK23X010 9C2023 12 08.23623 12 46 28.613+23 11 07.15 18.6 GVEX225G40
CK23X010 :C2023 12 08.24431 12 46 29.62 +23 11 45.8 18.0 VqEX225950
CK23X010 2C2023 12 08.24839 12 46 30.077+23 12 04.79 17.9 GVEX225G40
CK23X010 9C2023 12 08.25940 12 46 31.428+23 12 56.48 18.2 GVEX225G40
CK23X010 C2023 12 08.42835 12 46 52.17 +23 26 14.2 18.1 GVEX225V38
CK23X010 C2023 12 08.43048 12 46 52.34 +23 26 25.2 18.1 GVEX225V38
CK23X010 C2023 12 08.43260 12 46 52.61 +23 26 35.3 18.0 GVEX225V38
CK23X010 KC2023 12 08.50003 12 47 00.77 +23 31 55.1 18.6 GVEX225V21
CK23X010 KC2023 12 08.51425 12 47 02.47 +23 33 03.4 18.6 GVEX225V21
CK23X010 1C2023 12 08.51569712 47 02.634+23 33 09.97 VEX225703
CK23X010 1C2023 12 08.51776312 47 02.936+23 33 19.48 17.56GVEX225703
CK23X010 1C2023 12 08.52188912 47 03.494+23 33 40.46 17.66GVEX225703
CK23X010 KC2023 12 08.52847 12 47 04.21 +23 34 10.7 18.6 GVEX225V21
CK23X010 KC2023 12 08.54268 12 47 05.87 +23 35 18.7 18.2 GVEX225V21
CK23X010 1C2023 12 08.54971112 47 06.806+23 35 49.90 LEX225658
CK23X010 1C2023 12 08.55160912 47 07.024+23 35 58.52 LEX225658
CK23X010 1C2023 12 08.55351812 47 07.258+23 36 07.17 LEX225658
CK23X010 1C2023 12 08.55542812 47 07.455+23 36 16.75 LEX225658
CK23X010 1C2023 12 08.55732612 47 07.723+23 36 26.11 LEX225658
CK23X010 C2023 12 08.61712912 47 15.163+23 41 13.52 18.36oVEX225T08
CK23X010 C2023 12 08.62382012 47 15.998+23 41 44.20 18.33oVEX225T08
CK23X010 C2023 12 08.62767212 47 16.500+23 42 03.71 18.20oVEX225T08
CK23X010 C2023 12 08.63785612 47 17.736+23 42 51.66 18.49oVEX225T08
CK23X010 KC2023 12 08.81278 12 47 39.16 +23 56 42.7 SEX225D88
CK23X010 KC2023 12 08.81664 12 47 39.65 +23 57 02.5 SEX225D88
CK23X010 KC2023 12 08.82049 12 47 40.08 +23 57 21.3 15.7 TSEX225D88
CK23X010 KB2023 12 09.02104 12 48 04.99 +24 13 19.6 18.0 GVEX225M44
CK23X010 KB2023 12 09.02535 12 48 05.51 +24 13 41.7 17.8 GVEX225M44
CK23X010 KB2023 12 09.02948 12 48 06.04 +24 14 01.8 17.8 GVEX225M44
CK23X010 C2023 12 09.18764 12 48 25.72 +24 26 39.6 18.3 GVEX225Z17
CK23X010 C2023 12 09.18976 12 48 25.97 +24 26 49.2 18.6 GVEX225Z17
CK23X010 C2023 12 09.19188 12 48 26.31 +24 26 59.8 18.4 GVEX225Z17
CK23X010 KC2023 12 09.49526 12 49 04.03 +24 51 22.4 18.6 GVEX225V21
CK23X010 KC2023 12 09.50947 12 49 05.77 +24 52 30.6 18.1 GVEX225V21
CK23X010 KC2023 12 09.52369 12 49 07.45 +24 53 40.3 18.4 GVEX225V21
CK23X010 KC2023 12 09.53790 12 49 09.25 +24 54 49.4 18.5 GVEX225V21
CK23X010 C2023 12 09.63064912 49 21.062+25 02 19.00 18.96cVEX225T05
CK23X010 C2023 12 09.64061112 49 22.272+25 03 07.16 19.15cVEX225T05
CK23X010 C2023 12 09.64936512 49 23.323+25 03 49.72 19.03cVEX225T05
CK23X010 C2023 12 09.65464112 49 23.983+25 04 17.08 19.08cVEX225T05
CK23X010 KC2023 12 09.78591112 49 40.642+25 14 50.46 18.9 VqEX225Q21
CK23X010 KC2023 12 09.78942012 49 41.057+25 15 08.17 19.0 VqEX225Q21
CK23X010 KC2023 12 09.79644712 49 41.842+25 15 44.68 18.9 VqEX225Q21
CK23X010 KC2023 12 10.49009 12 51 09.96 +26 12 15.3 18.5 GVEX225V21
CK23X010 KC2023 12 10.50430 12 51 11.75 +26 13 26.2 18.5 GVEX225V21
CK23X010 KC2023 12 10.51852 12 51 13.54 +26 14 36.2 18.6 GVEX225V21
CK23X010 KC2023 12 10.53274 12 51 15.27 +26 15 46.4 18.5 GVEX225V21
CK23X010 KC2023 12 10.96541 12 52 11.08 +26 51 24.9 18.5 VEX225N51
CK23X010 KC2023 12 10.96852 12 52 11.52 +26 51 41.6 18.6 VEX225N51
CK23X010 KC2023 12 10.97170 12 52 11.89 +26 51 57.2 18.5 VEX225N51
CK23X010 mC2023 12 11.53946412 53 25.699+27 39 08.57 18.40GVEX225I52
CK23X010 mC2023 12 11.54086612 53 25.883+27 39 15.41 18.76GVEX225I52
CK23X010 mC2023 12 11.54226612 53 26.070+27 39 22.68 18.41GVEX225I52
CK23X010 mC2023 12 11.54334912 53 26.185+27 39 27.97 18.80GVEX225I52
Observer details:
204 Schiaparelli Observatory. Observer A. Aletti. Measurers A. Aletti, M.
Auteri. 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.
703 Catalina Sky Survey. Observers G. J. Leonard, R. A. Kowalski. Measurers
E. C. Beshore, 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, F. C. Shelly, K. W. Wierzchos. 0.68-m
Schmidt + 10K CCD.
858 Tebbutt Observatory, Edgewood. Observer F. B. Zoltowski. 0.16-m f/7
Refractor + 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.
C94 MASTER-II Observatory, Tunka. Observers Y. Kechin, V. Lipunov, E.
Gorbovskoy, N. Tiurina, P. Balanutsa, V. Kornilov, A. Kuznetsov, O. Gress,
D. Zimnukhov, S. Yazev, N. Budnev. 0.4-m f/2.5 reflector CCD.
D88 Hiratsuka. Observer Y. Sugiyama. 0.25-m f/5.0 reflector + CCD.
G40 Slooh.com Canary Islands Observatory. Observers N. Paul, B. Lutkenhoner.
0.5-m f/6.8 Corrected Dall-KIrkham + CCD, 0.43-m f/6.8 Corrected Dall-
Kirkham + CCD.
I52 Steward Observatory, Mt. Lemmon Station. Observer G. J. Leonard.
Measurers E. C. Beshore, 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, F. C. Shelly, K. W. Wierzchos. 1.0-m
prime focus + CCD.
J95 Great Shefford. Observer P. Birtwhistle. 0.41-m f/6.3 Schmidt-Cassegrain
+ CCD.
L01 Visnjan Observatory, Tican. Observer K. Korlevic. 1.0-m f/2.9 reflector
+ CCD.
L06 Sormano 2 Observatory, Bellagio Via Lattea. Observer G. Ventre. 0.36m
Schmidt Cassegrain + CCD.
M44 Al-Khatim Observatory, Abu Dhabi. Observer M. Odeh. 0.36-m f/7.7 SC +
CMO.
N51 GROWTH India Telescope, IAO, Hanle. Observers Y. Wagh, R. Kumar, R.
Sharma, V. Swain, K. Angail, V. Bhalerao, G. C. Anupama, S. Barway.
Measurer Y. Wagh. 0.70-m f/6.5 Corrected Dall-Kirkham + CCD.
P87 Hirao Observatory, Yamaguchi. Observer K. Yoshimoto. 0.20-m f/8 Ritchey-
Chretien + CCD + f/5.4 focal Reducer.
Q21 Southern Utsunomiya. Observer H. Nohara. 0.4-m f/3.8 Astrograph + CCD.
T03 Haleakala-LCO Clamshell #3. Observer A. Hale. 0.35-m f/3 Cassegrain +
CCD.
T05 ATLAS-HKO, Haleakala. Observers L. Denneau, R. Siverd, J. Tonry, H.
Weiland. Measurers L. Denneau, N. Erasmus, A. Fitzsimmons, A. Lawrence,
J. Robinson, R. Siverd, J. Tonry, H. Weiland. 0.5-m Reflector + CCD.
T08 ATLAS-MLO, Mauna Loa. Observers L. Denneau, R. Siverd, J. Tonry, H.
Weiland. Measurers L. Denneau, N. Erasmus, A. Fitzsimmons, A. Lawrence,
J. Robinson, R. Siverd, J. Tonry, H. Weiland. 0.5-m Reflector + CCD.
U94 iTelescope Observatory, Beryl Junction. Observers M. Mattiazzo, H. Sato.
0.43-m f/6.8 reflector + CCD + f/4.5 focal reducer, 0.25-m f/3.4
astrograph + CCD.
V21 Cewanee Observatory at DSNM. Observer D. T. Durig. 0.40 m f/8 Ritchey-
Chretien + 4656x3520 CCD.
V38 McDonald Observatory-LCO ELP Aqawan A #1. Observer A. Hale. 0.35-m f/3
Cassegrain + CCD.
Z17 Tenerife-LCO Aqawan A #2. Observer A. Hale. 0.35-m f/3 Cassegrain + CCD.
Orbital elements:
C/2023 X1 (Leonard)
Epoch 2023 Oct. 23.0 TT = JDT 2460240.5
T 2023 Oct. 18.28442 TT Veres
q 0.9536131 (2000.0) P Q
z -0.0000016 Peri. 321.82782 -0.72404606 -0.26410326
+/-0.0000000 Node 137.09107 +0.57484080 +0.27950050
e 1.0000015 Incl. 110.62761 -0.38120253 +0.92310830
>From 128 observations 2023 Dec. 4-11, mean residual 0".8.
Ephemeris:
Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 m2
2023 11 12 12 03 54.1 -02 59 57 1.4321 1.0468 47.0 43.7 18.0
...
2023 11 27 12 25 58.7 +10 04 34 1.2302 1.1747 62.9 48.4 18.1
...
2023 12 05 12 40 06.8 +19 04 34 1.1344 1.2564 72.3 48.4 18.3
...
2023 12 11 12 52 15.1 +26 54 15 1.0774 1.3220 79.6 47.1 18.4
2023 12 12 12 54 26.0 +28 17 43 1.0697 1.3332 80.8 46.8 18.4
2023 12 13 12 56 40.1 +29 42 32 1.0624 1.3445 82.0 46.5 18.4
...
2023 12 19 13 11 21.2 +38 35 33 1.0320 1.4135 89.0 44.1 18.6
...
2023 12 27 13 35 43.2 +50 56 50 1.0312 1.5083 96.9 40.3 18.9
...
2024 01 11 14 56 02.1 +71 29 30 1.1585 1.6914 104.0 34.3 19.6
M. P. C. Staff (C) Copyright 2023 MPC M.P.E.C. 2023-X225
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