MPEC 2009-M13 : COMET P/2009 L2 (YANG-GAO)
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M.P.E.C. 2009-M13 Issued 2009 June 18, 14:32 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 16.86551 18 16 54.50 -13 20 02.8 14.1 N EM013213
PK09L020 C2009 06 16.86699 18 16 54.54 -13 19 57.2 14.1 N EM013213
PK09L020 C2009 06 16.86810 18 16 54.57 -13 19 54.2 14.9 N EM013213
PK09L020 C2009 06 16.89682 18 16 55.12 -13 18 26.5 15.3 N EM013A13
PK09L020 C2009 06 16.91438 18 16 55.62 -13 17 28.9 15.8 N EM013A13
PK09L020 C2009 06 16.92048 18 16 55.70 -13 17 13.9 15.1 N EM013A13
PK09L020 C2009 06 16.92243 18 16 55.61 -13 17 08.5 13.3 N EM013A71
PK09L020 C2009 06 16.93112 18 16 55.78 -13 16 41.3 13.5 N EM013A71
PK09L020 C2009 06 16.93708 18 16 56.12 -13 16 22.3 15.2 N EM013A13
PK09L020 C2009 06 16.93831 18 16 55.96 -13 16 19.2 13.4 N EM013A71
PK09L020 C2009 06 16.94147 18 16 56.23 -13 16 09.2 15.5 N EM013A13
PK09L020 C2009 06 16.94405 18 16 56.13 -13 16 01.8 13.6 N EM013A71
PK09L020 C2009 06 16.94801 18 16 57.10 -13 15 42.1 14.4 N EM013J51
PK09L020 C2009 06 16.95105 18 16 57.16 -13 15 32.8 14.4 N EM013J51
PK09L020 C2009 06 16.95427 18 16 57.22 -13 15 22.9 14.4 N EM013J51
PK09L020 C2009 06 16.95566 18 16 56.59 -13 15 26.0 15.2 N EM013B96
PK09L020 C2009 06 16.95858 18 16 56.68 -13 15 16.7 15.2 N EM013B96
PK09L020 C2009 06 16.96092 18 16 56.70 -13 15 08.8 15.2 N EM013A13
PK09L020 C2009 06 16.96222 18 16 56.76 -13 15 05.7 15.3 N EM013B96
PK09L020 C2009 06 16.96587 18 16 56.86 -13 14 54.2 14.8 N EM013B96
PK09L020 C2009 06 16.97243 18 16 57.02 -13 14 33.8 15.2 N EM013B96
PK09L020 C2009 06 16.97535 18 16 57.06 -13 14 24.9 15.2 N EM013B96
PK09L020 C2009 06 16.97815 18 16 57.04 -13 14 16.5 14.2 N EM013B82
PK09L020 C2009 06 16.98035 18 16 57.10 -13 14 09.4 14.2 N EM013B82
PK09L020 C2009 06 16.98090 18 16 57.10 -13 14 07.8 14.2 N EM013B82
PK09L020 C2009 06 16.98200 18 16 57.12 -13 14 04.2 14.2 N EM013B82
PK09L020 C2009 06 16.98255 18 16 57.14 -13 14 02.3 14.1 N EM013B82
PK09L020 C2009 06 16.99257 18 16 58.01 -13 13 25.3 14.3 N EM013J47
PK09L020 C2009 06 16.99587 18 16 58.11 -13 13 14.9 15.3 N EM013J47
PK09L020 C2009 06 16.99749 18 16 58.14 -13 13 10.1 14.4 N EM013J47
PK09L020 C2009 06 16.99916 18 16 58.19 -13 13 04.7 14.3 N EM013J47
PK09L020 C2009 06 17.08499 18 16 59.80 -13 08 43.1 14.2 N EM013J07
PK09L020 C2009 06 17.11347 18 17 00.43 -13 07 14.7 14.1 N EM013J07
PK09L020 C2009 06 17.12580 18 17 00.71 -13 06 36.5 14.1 N EM013J07
PK09L020 C2009 06 17.27179 18 17 05.79 -12 59 04.9 14.4 N EM013850
PK09L020 C2009 06 17.28706 18 17 06.10 -12 58 18.2 14.5 N EM013850
PK09L020 C2009 06 17.30206 18 17 06.43 -12 57 32.0 14.4 N EM013850
PK09L020 C2009 06 17.31694 18 17 06.93 -12 56 46.4 15.2 N EM013H45
PK09L020 C2009 06 17.31697 18 17 06.74 -12 56 46.1 14.3 N EM013850
PK09L020 C2009 06 17.31872 18 17 06.97 -12 56 40.9 15.2 N EM013H45
PK09L020 C2009 06 17.32078 18 17 07.01 -12 56 34.5 15.2 N EM013H45
PK09L020 C2009 06 17.32211 18 17 07.04 -12 56 30.5 15.1 N EM013H45
PK09L020 C2009 06 17.32535 18 17 07.11 -12 56 20.4 15.1 N EM013H45
PK09L020 C2009 06 17.32685 18 17 07.14 -12 56 15.9 15.2 N EM013H45
PK09L020 C2009 06 17.33100 18 17 07.24 -12 56 02.7 15.2 N EM013H45
PK09L020 C2009 06 17.33178 18 17 07.17 -12 55 59.8 14.9 N EM013H47
PK09L020 C2009 06 17.33201 18 17 07.07 -12 55 59.7 14.4 N EM013850
PK09L020 C2009 06 17.33226 18 17 07.26 -12 55 59.1 12.9 T EM013H45
PK09L020 C2009 06 17.34201 18 17 07.37 -12 55 28.4 14.9 N EM013H47
PK09L020 C2009 06 17.35187 18 17 07.59 -12 54 57.9 15.0 N EM013H47
PK09L020 C2009 06 17.37541 18 17 08.52 -12 53 45.6 15.1 N EM013H10
PK09L020 C2009 06 17.37931 18 17 08.57 -12 53 34.3 14.5 N EM013H10
PK09L020 C2009 06 17.38329 18 17 08.68 -12 53 22.1 15.2 N EM013H10
PK09L020 C2009 06 17.39285 18 17 08.83 -12 52 51.8 14.2 N EM013H06
PK09L020 C2009 06 17.40024 18 17 08.99 -12 52 29.4 14.1 N EM013H06
PK09L020 C2009 06 17.41617 18 17 09.28 -12 51 39.4 13.9 T EM013H10
PK09L020 C2009 06 17.42831 18 17 09.92 -12 51 03.6 13.0 T EM013673
PK09L020 C2009 06 17.43363 18 17 10.04 -12 50 47.4 EM013673
PK09L020 C2009 06 17.43861 18 17 10.15 -12 50 32.0 EM013673
PK09L020 C2009 06 17.44231 18 17 10.21 -12 50 20.5 EM013673
PK09L020 C2009 06 17.46923 18 17 13.17 -12 48 26.9 14.1 T EM013D90
PK09L020 C2009 06 17.47283 18 17 13.24 -12 48 16.0 14.2 T EM013D90
PK09L020 C2009 06 17.52465 18 17 14.93 -12 45 35.3 15.1 N EM013D25
PK09L020 C2009 06 17.53559 18 17 15.20 -12 45 02.0 14.8 N EM013D25
PK09L020 C2009 06 17.54389 18 17 14.98 -12 45 09.8 EM013900
PK09L020 C2009 06 17.54710 18 17 15.04 -12 44 59.9 14.7 N EM013900
PK09L020 C2009 06 17.59075 18 17 16.50 -12 42 14.5 14.9 N EM013D25
PK09L020 C2009 06 17.59997 18 17 16.71 -12 41 46.6 14.6 N EM013D25
PK09L020 C2009 06 17.60922 18 17 16.90 -12 41 18.5 14.7 N EM013D25
PK09L020 C2009 06 17.67715 18 17 17.43 -12 37 52.9 15.0 N EM013E16
PK09L020 C2009 06 17.69851 18 17 17.89 -12 36 47.6 EM013E16
PK09L020 C2009 06 17.70304 18 17 17.99 -12 36 33.6 EM013E16
PK09L020 C2009 06 17.70812 18 17 18.11 -12 36 17.9 EM013E16
PK09L020 C2009 06 17.70995 18 17 18.34 -12 36 13.5 12.5 T EM013D90
PK09L020 C2009 06 17.71303 18 17 18.39 -12 36 04.0 EM013D90
PK09L020 C2009 06 17.71443 18 17 18.44 -12 36 00.0 EM013D90
PK09L020 C2009 06 17.71590 18 17 18.45 -12 35 55.4 EM013D90
PK09L020 C2009 06 17.90221 18 17 25.70 -12 26 59.4 14.7 N EM013J10
PK09L020 C2009 06 17.90779 18 17 25.83 -12 26 42.5 14.7 N EM013J10
PK09L020 C2009 06 17.90971 18 17 25.69 -12 26 39.0 15.0 N EM013A77
PK09L020 C2009 06 17.91490 18 17 25.98 -12 26 21.2 14.9 N EM013J10
PK09L020 C2009 06 17.91737 18 17 26.03 -12 26 13.7 15.6 N EM013J08
PK09L020 C2009 06 17.93052 18 17 26.16 -12 25 36.3 14.6 N EM013A77
PK09L020 C2009 06 17.93827 18 17 26.32 -12 25 12.7 14.6 N EM013A77
PK09L020 C2009 06 17.94448 18 17 26.46 -12 24 53.8 14.6 N EM013A77
PK09L020 C2009 06 17.94607 18 17 26.57 -12 24 48.4 15.8 N EM013B49
PK09L020 C2009 06 17.95065 18 17 26.67 -12 24 34.4 15.9 N EM013B49
PK09L020 C2009 06 17.95487 18 17 26.76 -12 24 21.7 15.9 N EM013B49
PK09L020 C2009 06 17.97223 18 17 26.97 -12 23 29.6 15.69N EM013B66
PK09L020 C2009 06 17.98025 18 17 27.37 -12 23 04.5 15.7 N EM013J08
PK09L020 C2009 06 17.98600 18 17 27.21 -12 22 48.1 16.15N EM013B66
PK09L020 C2009 06 17.98678 18 17 27.41 -12 22 44.9 14.4 N EM013B74
PK09L020 C2009 06 17.99175 18 17 27.20 -12 22 32.3 13.5 N EM013A71
PK09L020 C2009 06 17.99179 18 17 27.54 -12 22 29.6 14.4 N EM013B74
PK09L020 C2009 06 17.99260 18 17 27.57 -12 22 27.2 14.4 N EM013B74
PK09L020 C2009 06 17.99285 18 17 27.22 -12 22 29.0 13.5 N EM013A71
PK09L020 C2009 06 17.99394 18 17 27.24 -12 22 25.7 13.5 N EM013A71
PK09L020 C2009 06 17.99502 18 17 27.27 -12 22 22.3 13.6 N EM013A71
PK09L020 C2009 06 17.99611 18 17 27.26 -12 22 19.2 13.6 N EM013A71
PK09L020 C2009 06 17.99720 18 17 27.33 -12 22 15.8 13.6 N EM013A71
PK09L020 C2009 06 18.00021 18 17 27.58 -12 22 05.1 16.07N EM013B66
PK09L020 C2009 06 18.04303 18 17 29.01 -12 19 51.9 14.3 N EM013J47
PK09L020 C2009 06 18.04820 18 17 29.08 -12 19 36.0 15.3 N EM013J47
PK09L020 C2009 06 18.05449 18 17 29.21 -12 19 17.1 15.5 N EM013J47
PK09L020 C2009 06 18.05490 18 17 29.22 -12 19 15.5 14.3 N EM013J47
PK09L020 C2009 06 18.53229 18 17 43.81 -11 55 24.2 EM013367
PK09L020 C2009 06 18.53403 18 17 43.85 -11 55 18.9 EM013367
PK09L020 C2009 06 18.53576 18 17 43.94 -11 55 13.9 14.0 T EM013367
Observer details:
213 Observatorio Montcabre. Observer R. Naves. Measurer M. Campas. 0.30-m
f/10 Schmidt-Cassegrain + CCD.
367 Yatsuka. Observer H. Abe. 0.26-m f/6.0 reflector + CCD.
673 Table Mountain Observatory, Wrightwood. Observer J. Young. 0.61-m f/16
Cassegrain + CCD.
850 Cordell-Lorenz Observatory, Sewanee. Observers D. T. Durig, P. Kharel.
0.30-m f/2.5 Schmidt-Cassegrain + CCD.
900 Moriyama. Observer Y. Ikari. 0.26-m f/7.0 reflector + 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.
A77 Observatoire Chante-Perdrix, Dauban. Observers C. Rinner, F. Kugel.
Measurer F. Kugel. 0.5-m f/3 reflector + CCD.
B49 Paus Observatory, Sabadell. Observer J. Camarasa. 0.25-m f/4 Newtonian
reflector + CCD.
B66 Osservatorio di Casasco. Observer W. Borghini. 0.4-m f/7.3
Ritchey-Chretien + CCD.
B74 Santa Maria de Montmagastrell. Observer J. M. Bosch. 0.31-m f/4.9
Newtonian reflector + CCD.
B82 Maidbronn. Observer B. Haeusler. 0.30-m Schmidt-Cassegrain + CCD.
B96 Brixiis Observatory, Kruibeke. Observer E. Bryssinck. 0.28-m f/10
Schmidt-Cassegrain + CCD.
D25 Tzec Maun Observatory, Pingelly. Observer S. Farmer, Jr. 0.15-m f/7.3
refractor + CCD.
D90 RAS Observatory, Moorook. Observers M. Suzuki, H. Sato. 0.25-m f/6.0
Ritchey-Chretien + CCD.
E16 Grove Creek Observatory, Trunkey. Observers P. Camilleri, E. Guido,
E. Prosperi, G. Sostero. Measurer E. Prosperi. 0.36-m f/7
Schmidt-Cassegrain + CCD.
H06 RAS Observatory, Mayhill. Observers E. Guido, G. Sostero, P. Camilleri,
E. Prosperi. 0.25-m f/3.4 reflector + CCD.
H10 Tzec Maun Observatory, Mayhill. Observers L. Elenin, T. Kryachko.
Measurer T. Kryachko. 0.18-m f/7.3 refractor + CCD, 0.36-m f/3.8
Maksutov-Newtonian + CCD.
H45 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.
J07 Observatorio SPAG Monfrague, Palazuelo-Empalme. Observers A. Fernandez,
M. A. Garcia. Measurers J. Curto, J. Temprano. 0.25-m f/3.6 reflector
+ CCD. Long. = 353.89543, rho cos phi' = 0.767881, rho sin phi' =
+0.638546.
J08 Observatorio Zonalunar, Puzol. Observer A. Carreno. Measurer J. Piqueras.
0.20-m f/5 Newtonian reflector + CCD.
J10 Alicante. Observer M. Rodriguez de Viguri. 0.20-m f/5 reflector + CCD.
J47 Observatorio Nazaret. Observer G. Muler. 0.30-m Schmidt-Cassegrain + CCD.
J51 Observatorio Atlante, Tenerife. Observer J. A. Henriquez. 0.2-m f/9
Cassegrain + CCD.
Orbital elements:
P/2009 L2 (Yang-Gao)
T 2009 May 21.658 TT MPC
q 1.29650 (2000.0) P Q
n 0.154106 Peri. 346.864 -0.395013 +0.876822
a 3.44554 Node 259.315 -0.815640 -0.472039
e 0.62372 Incl. 16.199 -0.422725 +0.091450
P 6.40
From 147 observations 2009 June 15-18.
Ephemeris:
P/2009 L2 (Yang-Gao)
Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 m2
2009 06 18 18 17.46 -12 21.8 0.327 1.337 166.7 10.1 13.8
2009 06 23 18 19.59 -08 26.6 0.345 1.352 164.7 11.4 14.0
2009 06 28 18 21.32 -05 06.8 0.367 1.370 161.8 13.4 14.2
2009 07 03 18 22.91 -02 23.1 0.393 1.390 158.5 15.5 14.4
2009 07 08 18 24.54 -00 13.3 0.423 1.412 155.3 17.5 14.6
2009 07 13 18 26.34 +01 25.9 0.456 1.435 152.1 19.3 14.9
2009 07 18 18 28.41 +02 38.3 0.492 1.460 149.1 20.9 15.1
2009 07 23 18 30.84 +03 28.1 0.531 1.487 146.2 22.3 15.4
2009 07 28 18 33.70 +03 59.0 0.574 1.516 143.4 23.5 15.6
Brian G. Marsden (C) Copyright 2009 MPC M.P.E.C. 2009-M13
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