MPEC 2009-N18 : COMET P/2009 L2 (YANG-GAO)
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M.P.E.C. 2009-N18 Issued 2009 July 6, 15:36 UT
The Minor Planet Electronic Circulars contain information on unusual
minor planets and routine data on comets. They are published
on behalf of Commission 20 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 http://www.cfa.harvard.edu/iau/mpc.html ISSN 1523-6714
COMET P/2009 L2 (YANG-GAO)
Observations:
PK09L020 C2009 06 19.95958 18 18 22.11 -10 45 49.6 14.2 T EN018B99
PK09L020 C2009 06 20.00733 18 18 22.95 -10 43 33.1 14.1 T EN018B99
PK09L020 C2009 06 20.00900 18 18 22.97 -10 43 28.1 14.2 T EN018B99
PK09L020 C2009 06 23.95056 18 19 56.29 -07 46 02.5 15.4 T EN018583
PK09L020 C2009 06 23.95076 18 19 56.27 -07 46 01.8 15.4 T EN018583
PK09L020 C2009 06 23.95633 18 19 56.37 -07 45 47.1 14.0 T EN018583
PK09L020 C2009 06 23.95654 18 19 56.38 -07 45 46.8 14.0 T EN018583
PK09L020 C2009 06 25.13872 18 20 22.05 -06 56 23.1 EN018834
PK09L020 C2009 06 25.14657 18 20 22.14 -06 56 03.9 EN018834
PK09L020 C2009 06 26.99032 18 20 59.70 -05 44 21.4 14.7 N EN018212
PK09L020 C2009 06 26.99255 18 20 59.71 -05 44 16.9 14.6 N EN018212
PK09L020 C2009 06 26.99476 18 20 59.75 -05 44 11.8 14.7 N EN018212
PK09L020 C2009 06 27.13495 18 21 02.75 -05 38 27.9 EN018I19
PK09L020 C2009 06 27.14008 18 21 02.80 -05 38 16.3 EN018I19
PK09L020 C2009 06 27.14522 18 21 02.86 -05 38 04.7 EN018I19
PK09L020 C2009 06 28.92788 18 21 37.25 -04 33 52.6 15.2 N EN018585
PK09L020 C2009 06 28.92950 18 21 37.28 -04 33 49.5 15.2 N EN018585
PK09L020 C2009 06 28.93027 18 21 37.28 -04 33 47.9 15.2 N EN018585
PK09L020 C2009 06 28.93104 18 21 37.29 -04 33 46.2 15.1 N EN018585
PK09L020 C2009 06 28.93181 18 21 37.30 -04 33 44.5 15.2 N EN018585
PK09L020 C2009 06 28.99573 18 21 38.54 -04 31 32.7 15.4 N EN018B01
PK09L020 C2009 06 28.99925 18 21 38.58 -04 31 25.5 15.4 N EN018B01
PK09L020 C2009 06 29.00394 18 21 38.64 -04 31 15.6 15.4 N EN018B01
PK09L020 C2009 06 29.00745 18 21 38.68 -04 31 08.2 15.4 N EN018B01
PK09L020 C2009 06 29.01332 18 21 38.76 -04 30 56.0 15.4 N EN018B01
PK09L020 C2009 06 29.90398 18 21 56.49 -04 00 24.3 15.2 N EN018A13
PK09L020 C2009 06 29.92532 18 21 56.76 -03 59 41.5 15.5 N EN018A13
PK09L020 C2009 06 29.98178 18 21 57.30 -03 57 45.3 15.0 N EN018B40
PK09L020 C2009 06 29.98493 18 21 57.32 -03 57 39.1 14.6 N EN018B40
PK09L020 C2009 06 30.31580 18 22 03.38 -03 46 37.6 15.0 N EN018H45
PK09L020 C2009 06 30.31764 18 22 03.41 -03 46 34.0 15.0 N EN018H45
PK09L020 C2009 06 30.31962 18 22 03.42 -03 46 30.1 15.2 N EN018H45
PK09L020 C2009 06 30.32615 18 22 03.50 -03 46 17.1 15.2 N EN018H45
PK09L020 C2009 06 30.33268 18 22 03.59 -03 46 04.3 13.3 T EN018H45
PK09L020 C2009 06 30.33480 18 22 03.62 -03 46 00.0 13.3 T EN018H45
PK09L020 C2009 06 30.92110 18 22 15.52 -03 26 59.2 13.5 N EN018A71
PK09L020 C2009 06 30.92433 18 22 15.56 -03 26 52.9 13.6 N EN018A71
PK09L020 C2009 06 30.92756 18 22 15.60 -03 26 46.6 13.5 N EN018A71
PK09L020 C2009 06 30.93080 18 22 15.64 -03 26 40.4 13.5 N EN018A71
PK09L020 C2009 06 30.93446 18 22 15.70 -03 26 33.0 13.5 N EN018A71
PK09L020 C2009 06 30.93457 18 22 15.48 -03 26 32.5 14.9 N EN018585
PK09L020 C2009 06 30.93769 18 22 15.73 -03 26 26.9 13.6 N EN018A71
PK09L020 C2009 06 30.93888 18 22 15.48 -03 26 24.5 15.1 N EN018585
PK09L020 C2009 06 30.93931 18 22 15.49 -03 26 23.9 15.1 N EN018585
PK09L020 C2009 06 30.94015 18 22 15.49 -03 26 22.4 15.1 N EN018585
PK09L020 C2009 06 30.94100 18 22 15.49 -03 26 20.3 15.1 N EN018585
PK09L020 C2009 06 30.94141 18 22 15.52 -03 26 19.4 15.1 N EN018585
PK09L020 C2009 06 30.94184 18 22 15.52 -03 26 18.6 15.1 N EN018585
PK09L020 C2009 06 30.94227 18 22 15.53 -03 26 18.1 15.1 N EN018585
PK09L020 C2009 06 30.94782 18 22 15.60 -03 26 07.1 15.1 N EN018585
PK09L020 C2009 06 30.94859 18 22 15.98 -03 26 03.8 15.7 N EN018B09
PK09L020 C2009 06 30.95038 18 22 16.00 -03 26 00.3 15.7 N EN018B09
PK09L020 C2009 07 01.01733 18 22 17.04 -03 23 49.5 14.4 N EN018J10
PK09L020 C2009 07 01.01949 18 22 17.01 -03 23 45.3 14.7 N EN018J10
PK09L020 C2009 07 01.02244 18 22 17.05 -03 23 40.0 15.2 N EN018J10
PK09L020 C2009 07 01.18176 18 22 21.07 -03 18 33.9 EN018H10
PK09L020 C2009 07 01.18515 18 22 21.12 -03 18 27.6 EN018H10
PK09L020 C2009 07 01.18815 18 22 21.14 -03 18 21.8 EN018H10
PK09L020 C2009 07 01.31598 18 22 22.35 -03 14 18.3 14.8 N EN018H45
PK09L020 C2009 07 01.31797 18 22 22.38 -03 14 14.4 14.8 N EN018H45
PK09L020 C2009 07 01.31944 18 22 22.39 -03 14 11.7 14.7 N EN018H45
PK09L020 C2009 07 01.32115 18 22 22.42 -03 14 08.4 14.8 N EN018H45
PK09L020 C2009 07 01.32312 18 22 22.44 -03 14 04.7 14.8 N EN018H45
PK09L020 C2009 07 01.32458 18 22 22.44 -03 14 03.0 13.3 T EN018H45
PK09L020 C2009 07 01.32613 18 22 22.43 -03 13 59.9 13.3 T EN018H45
PK09L020 C2009 07 01.92858 18 22 34.78 -02 55 16.0 EN018B96
PK09L020 C2009 07 01.93368 18 22 34.80 -02 55 07.7 EN018B96
PK09L020 C2009 07 01.94024 18 22 34.90 -02 54 55.6 EN018B96
PK09L020 C2009 07 01.94608 18 22 34.98 -02 54 45.3 13.7 N EN018B96
PK09L020 C2009 07 01.95106 18 22 34.91 -02 54 33.1 15.4 N EN018160
PK09L020 C2009 07 01.95346 18 22 34.94 -02 54 28.7 15.4 N EN018160
PK09L020 C2009 07 01.95623 18 22 34.95 -02 54 23.4 15.4 N EN018160
PK09L020 C2009 07 02.23963 18 22 40.65 -02 45 42.3 EN018H10
PK09L020 C2009 07 02.24625 18 22 40.76 -02 45 30.7 EN018H10
PK09L020 C2009 07 02.25438 18 22 40.81 -02 45 15.1 EN018H10
PK09L020 C2009 07 02.25669 18 22 40.42 -02 45 11.5 15.0 N EN018850
PK09L020 C2009 07 02.27662 18 22 40.66 -02 44 35.1 15.4 N EN018850
PK09L020 C2009 07 02.29383 18 22 40.85 -02 44 04.1 15.0 N EN018850
PK09L020 C2009 07 02.30905 18 22 41.03 -02 43 36.1 15.2 N EN018850
PK09L020 C2009 07 02.31162 18 22 41.13 -02 43 30.6 14.8 N EN018H47
PK09L020 C2009 07 02.31740 18 22 41.19 -02 43 20.4 14.7 N EN018H47
PK09L020 C2009 07 02.32248 18 22 41.27 -02 43 11.1 14.6 N EN018H47
PK09L020 C2009 07 02.96486 18 22 54.21 -02 24 07.6 14.8 N EN018A02
PK09L020 C2009 07 02.96635 18 22 54.22 -02 24 04.7 14.4 N EN018A02
PK09L020 C2009 07 03.26259 18 22 59.48 -02 15 24.1 14.8 N EN018850
PK09L020 C2009 07 03.27757 18 22 59.66 -02 14 58.1 15.1 N EN018850
PK09L020 C2009 07 03.29255 18 22 59.83 -02 14 32.0 15.1 N EN018850
PK09L020 C2009 07 03.30816 18 23 00.09 -02 14 04.3 14.9 N EN018H47
PK09L020 C2009 07 03.31454 18 23 00.17 -02 13 53.2 14.9 N EN018H47
PK09L020 C2009 07 03.32191 18 23 00.27 -02 13 40.3 14.9 N EN018H47
PK09L020 C2009 07 03.86571 18 23 11.99 -01 58 13.8 15.2 N EN018213
PK09L020 C2009 07 03.86722 18 23 12.00 -01 58 11.6 15.2 N EN018213
PK09L020 C2009 07 03.86874 18 23 12.02 -01 58 08.8 15.1 N EN018213
PK09L020 C2009 07 03.96903 18 23 13.36 -01 55 19.6 15.0 N EN018939
PK09L020 C2009 07 03.97277 18 23 13.41 -01 55 13.5 15.0 N EN018939
PK09L020 C2009 07 03.97650 18 23 13.46 -01 55 07.2 15.0 N EN018939
PK09L020 C2009 07 04.75748 18 23 27.68 -01 33 14.5 15.4 N EN018D25
PK09L020 C2009 07 04.76125 18 23 27.72 -01 33 09.6 15.7 N EN018D25
PK09L020 C2009 07 04.76500 18 23 27.77 -01 33 03.7 15.8 N EN018D25
PK09L020 C2009 07 04.95396 18 23 32.36 -01 28 25.0 15.1 N EN018B89
PK09L020 C2009 07 04.95616 18 23 32.38 -01 28 21.5 15.1 N EN018B89
PK09L020 C2009 07 04.95946 18 23 32.41 -01 28 16.4 15.1 N EN018B89
PK09L020 C2009 07 04.96535 18 23 32.43 -01 28 06.3 15.1 N EN018232
PK09L020 C2009 07 04.96703 18 23 32.49 -01 28 04.5 15.1 N EN018232
PK09L020 C2009 07 04.96869 18 23 32.55 -01 28 02.1 15.1 N EN018232
PK09L020 C2009 07 05.51847 18 23 44.09 -01 13 09.1 EN018D25
PK09L020 C2009 07 05.52035 18 23 44.12 -01 13 06.1 EN018D25
PK09L020 C2009 07 05.85414 18 23 50.26 -01 04 55.0 17.1 N EN018B40
PK09L020 C2009 07 05.86096 18 23 50.39 -01 04 43.9 16.8 N EN018B40
Observer details:
160 Castelmartini. Observers P. Camilleri, E. Guido, E. Prosperi, G. Sostero.
Measurer E. Prosperi. 0.35-m f/10 Schmidt-Cassegrain + CCD.
212 Observatorio La Dehesilla. Observer I. Almendros. 0.30-m f/10
Schmidt-Cassegrain + CCD.
213 Observatorio Montcabre. Observer R. Naves. Measurer M. Campas. 0.30-m
f/10 Schmidt-Cassegrain + CCD.
232 Masquefa Observatory. Observer E. Reina. 0.25-m f/3.3 Schmidt-Cassegrain
+ CCD.
583 Odessa-Mayaki. Observers S. Kashuba, V. Kashuba, Yu. Gorbanev,
S. Podlesnyak, A. Movchan, A. Klabukova, V. Derevyagin, R. Shepelenko,
I. Shepelenko. Measurer I. Stogneeva. 0.60-m f/8.0 Ritchey-Chretien
+ CCD.
585 Kiev comet station. Observers A. Baransky, K. Churyumov, V. Ponomarenko.
0.7-m f/4 reflector + CCD.
834 Buenos Aires-AAAA. Observers R. Mackintosh, M. Konishi, R. Mykytyuk.
Measurer R. Mackintosh. 0.25-m f/6.3 Schmidt-Cassegrain + CCD.
850 Cordell-Lorenz Observatory, Sewanee. Observers D. T. Durig, P. Kharel.
Measurers D. T. Durig, P. Kharel, R. A. Holt. 0.30-m f/2.5
Schmidt-Cassegrain + CCD.
939 Observatorio Rodeno. Observer J. Castellano. 0.20-m f/10
Schmidt-Cassegrain + CCD.
A02 Masia Cal Maciarol Modul 8. Observers J. L. Salto, A. Salto. Measurer
J. L. Salto. 0.25-m f/7.2 Schmidt-Cassegrain + CCD.
A13 Observatoire Naef, Marly. Observer P. Kocher. 0.5-m f/3.3 Hypergraph
+ CCD.
A71 Stixendorf. Observer M. Jaeger. Measurer W. Vollmann. 0.20-m f/2.8
reflector + CCD.
B01 Taunus Observatory, Frankfurt. Observer S. Karge. 0.60-m f/3.3
Cassegrain + CCD.
B09 Capannoli. Observer P. Bacci. 0.25-m f/10 Schmidt-Cassegrain + CCD.
B40 Skylive Observatory, Catania. Observers P. Camilleri, G. Sostero,
E. Guido, E. Prosperi. Measurers P. Camilleri, E. Prosperi. 0.3-m f/6
Schmidt-Cassegrain + CCD.
B89 Observatori Astronomic de Tiana. Observers R. Bosque, J. Martin,
J. M. Aymami, D. Rodriguez, G. Aixela. 0.43-m f/6.8 reflector + CCD.
B96 Brixiis Observatory, Kruibeke. Observer E. Bryssinck. 0.28-m f/10
Schmidt-Cassegrain + CCD.
B99 Santa Coloma de Gramenet. Observer C. Gonzalez. 0.20-m f/9 Cassegrain
+ CCD.
D25 Tzec Maun Observatory, Pingelly. Observers L. Elenin, D. Chestnov.
0.15-m f/7.3 refractor + CCD.
H10 Tzec Maun Observatory, Mayhill. Observer D. Chestnov. 0.18-m f/7.3
refractor + CCD, 0.41-m f/9 Ritchey-Chretien + CCD.
H45 Arkansas Sky Obs., Petit Jean Mountain South. Observer P. C. Sherrod.
0.51-m f/4.3 astrograph + CCD.
H47 Vicksburg. Observer C. Bell. 0.3-m f/4.7 Schmidt-Cassegrain + CCD.
I19 Tanti. Observer C. Colazo. 0.28-m f/10 Schmidt-Cassegrain + CCD.
J10 Alicante. Observer M. Rodriguez de Viguri. 0.20-m f/5 reflector + CCD.
Orbital elements:
P/2009 L2 (Yang-Gao)
T 2009 May 21.736 TT MPC
q 1.29641 (2000.0) P Q
n 0.155132 Peri. 346.937 -0.394005 +0.877386
a 3.43032 Node 259.309 -0.816236 -0.470954
e 0.62207 Incl. 16.177 -0.422515 +0.091629
P 6.35
From 563 observations 2009 June 15-July 5.
Ephemeris:
P/2009 L2 (Yang-Gao)
Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 m2
2009 06 28 18 21.32 -05 06.7 0.366 1.369 161.8 13.4 14.2
2009 07 03 18 22.91 -02 22.8 0.392 1.389 158.5 15.6 14.4
2009 07 08 18 24.54 -00 12.9 0.422 1.411 155.3 17.6 14.6
2009 07 13 18 26.34 +01 26.3 0.455 1.434 152.1 19.4 14.9
2009 07 18 18 28.41 +02 38.9 0.491 1.460 149.1 21.0 15.1
2009 07 23 18 30.85 +03 28.6 0.530 1.486 146.2 22.3 15.3
2009 07 28 18 33.71 +03 59.6 0.573 1.515 143.4 23.5 15.6
2009 08 02 18 37.03 +04 15.6 0.618 1.544 140.7 24.6 15.8
2009 08 07 18 40.81 +04 19.7 0.667 1.575 138.1 25.5 16.1
2009 08 12 18 45.02 +04 14.6 0.718 1.606 135.5 26.2 16.3
2009 08 17 18 49.66 +04 02.5 0.771 1.639 133.0 26.9 16.6
2009 08 22 18 54.71 +03 45.4 0.828 1.672 130.4 27.4 16.8
2009 08 27 19 00.15 +03 25.0 0.888 1.706 127.8 27.9 17.1
Brian G. Marsden (C) Copyright 2009 MPC M.P.E.C. 2009-N18
Read MPEC 2009-N17
Read MPEC 2009-N19
