J/A+A/567/A126 Warsaw Catalogue of cometary orbits (Krolikowska, 2014)
Warsaw Catalogue of cometary orbits: 119 near-parabolic comets.
Krolikowska M.
<Astron. Astrophys. 567, A126 (2014)>
=2014A&A...567A.126K 2014A&A...567A.126K
ADC_Keywords: Minor planets
Keywords: catalogs - comets: general - Oort Cloud
Abstract:
The dynamical evolution of near-parabolic comets strongly depends on
the starting values of the orbital elements derived from the
positional observations. In addition, when drawing conclusions about
the origin of these objects, it is crucial to control the
uncertainties of orbital elements at each stage of the dynamical
evolution.
I apply a completely homogeneous approach to determine the cometary
orbits and their uncertainties. The resulting catalogue is suitable
for the investigation of the origin and future of near-parabolic
comets.
First, osculating orbits were determined on the basis of positional
data. Second, the dynamical calculations were performed backwards and
forwards up to 250AU from the Sun to derive original and future
barycentric orbits for each comet. In the present investigation of
dynamical evolution, the numerical calculations for a given object
start from the swarm of virtual comets constructed using the
previously determined osculating (nominal) orbit. In this way, the
uncertainties of orbital elements were derived at the end of numerical
calculations.
Description:
Description of observational material and the new orbital quality
assessment for 119 near-parabolic comets mostly investigated in P1-P4
(see references below), and homogeneous sets of orbital elements for
osculating, original and future orbits.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 184 135 Description of observational material and the new
orbital quality assessment for 119 near-parabolic
comets
tableb.dat 198 134 Heliocentric orbital elements of osculating
orbits for comets from Samples A1, A2 and B
tablec.dat 198 128 Barycentric orbital elements of original orbits,
i.e. before entering the planetary zone for
near-parabolic comets of Samples A1, A2 and B
tabled.dat 198 126 Barycentric orbital elements of future orbits,
i.e. after leaving the planetary zone for
near-parabolic comets of Samples A1, A2 and B
tableb4.dat 115 54 NG parameters for comets with NG heliocentric
orbital elements of osculating orbits in tableb.dat
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See also:
B/comets : Database of the orbital elements of comets (Rocher, 2007)
Byte-by-byte Description of file(#): tablea1.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- Sample [A1 A2 B] Sample name (G1)
4- 15 A12 --- Desig Comet's designation
17- 40 A24 --- Cname Comet's name
41- 46 F6.3 AU qosc Occulating perihelion distance
53- 60 I8 "YYYYMMDD" Time Perihelion time
67- 74 I8 "YYYYMMDD" arc1 Date of the first observation
77- 84 I8 "YYYYMMDD" arc2 Date of the last observation
89- 93 I5 --- Nobs [7/5337] number of observations
taken into account
98-102 F5.2 yr arcy interval of data (arc in years)
107-111 F5.2 AU dh1 heliocentric distance of the first observation
113-117 F5.2 AU dh2 heliocentric distance of the last observation
123-132 A10 --- datat Data type in the sense of time-distribution
around perihelion: pre, post, full
133-140 A8 --- Model Model type (GR=pure gravitational,
NG=non-gravitational)
141-143 F3.1 --- Q*GR ? Accuracy of gravitational orbit
149-151 F3.1 --- Q*NG ? Accuracy of non-gravitational orbit when
determinable
157-159 A3 --- Qnew New quality orbit assessment (1a+ is best)
164-167 F4.2 arcsec RMS Root-mean-square error
168-173 I6 --- Nres [14/10589] Number of residuals taken for orbit
determination for a given model
178-184 A7 --- Ref References to the solution (see the original
article for the remaining symbols) (1)
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Note (1): References to the solution are:
P1 = Krolikowska and Dybczynski, 2010MNRAS.404.1886K 2010MNRAS.404.1886K
P2 = Dybczynski and Krolikowska, 2011MNRAS.416...51D 2011MNRAS.416...51D
P3 = Krolikowska, Dybczynski and Sitarski, 2012A&A...544A.119K 2012A&A...544A.119K
P4 = Krolikowska and Dybczynski, 2013MNRAS.435..440K 2013MNRAS.435..440K
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Byte-by-byte Description of file: table[bcd].dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- Sample [A1 A2 B] Sample name (G1)
4 A1 --- Com [a-l] Comments (1)
6- 17 A12 --- Desig Comet's designation
18- 25 I8 "YYYYMMDD" Epoch Epoch, year
28- 31 I4 yr T.Y Perihelion time, year
32- 33 I2 "month" T.M Perihelion time, month
34- 42 F9.6 d T.D Perihelion time, day
43- 56 F14.8 AU q Perihelion distance
57- 70 F14.8 --- e [0.96/1.06] Eccentricity
71- 82 F12.6 deg ARG [0/360] Argument of perihelion ω (J2000)
83- 94 F12.6 deg LONG [0/360] Longitude of the ascending node Ω
(J2000)
95-106 F12.6 deg i Inclination of the orbit in degrees (J2000)
107-115 F9.2 10-6/AU 1/a Inverse of semimajor axis
116-125 F10.6 d e_T.D Uncertainty of Perihelion time in days
126-139 F14.8 AU e_q Uncertainty of perihelion distance
140-153 F14.8 --- e_e Uncertainty of eccentricity
154-165 F12.6 deg e_ARG Uncertainty of argument of perihelion
166-177 F12.6 deg e_LONG Uncertainty of longitude of the ascending node
178-189 F12.6 deg e_i Uncertainty of inclination
190-198 F9.2 10-6/AU e_1/a Uncertainty of inverse of semimajor axis
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Note (1): Comments as follows:
a = Osculating barycentric orbits based on the entire data sets (tableb)
or Original barycentric orbits based on the entire data sets (tablec)
b = Osculating orbits based on DIST or pre-perihelion data sets
c = Osculating orbits based on post-perihelion data sets
d = Osculating orbits from the entire data sets
e = Osculating orbits from pre-perihelion data sets for investigating the
past dynamical evolution or Original barycentric orbits based on
pre-perihelion data sets
f = Osculating orbits from post-perihelion data sets for investigating the
future dynamical evolution
g = Osculating orbits based on the entire data sets
h = Original orbits based on the osculating orbits determined from the
entire data sets
i = Future barycentric orbits based on the entire data sets
j = Future barycentric orbits based on DIST or post-perihelion data sets
k = Future barycentric orbits based on post-perihelion data sets
l = Future orbits based on the osculating orbits determined from the
entire data sets
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Byte-by-byte Description of file(#): tableb4.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- Sample [A1 A2 B] Sample name (G1)
4- 15 A12 --- Desig Comet's designation
18- 29 F12.5 10-8AU/d2 A1 Radial non-gravitational (NG) parameter
30- 41 F12.5 10-8AU/d2 e_A1 Uncertainy of radial NG parameter
42- 52 F11.5 10-8AU/d2 A2 Transverse non-gravitational (NG) parameter
54- 64 F11.5 10-8AU/d2 e_A2 Uncertainy of transverse NG parameter
67- 77 F11.5 10-8AU/d2 A3 Normal non-gravitational (NG) parameter
78- 86 F9.5 10-8AU/d2 e_A3 Uncertainy of normal NG parameter
90- 96 F7.2 d tau Time shift of maximum of g(r) relative to
perihelion time (2)
97-103 F7.2 d e_tau ? Uncertainty of perihelion time (3)
112-115 A4 --- Model Type of model (STD, PRE, POST, or DIST)
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Note (2): negative value means that maximum of g(r) is before perihelion passage
Note (3): for C/1959 Y1 tau was assumed
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Global notes:
Note (G1): Samples as follows:
A1 = Years 1885-2005. 28 near-parabolic comets of qosc<3.1AU and original
inverse semi-major axes (1/aori) less than 0.000150/AU
A2 = Years 2006-2010. Complete sample of near-parabolic comets of qosc<3.1AU
and original inverse semi-major axes (1/aori) less than 0.000150/AU
B = Years 1970-2010. Almost complete sample of 69 near-parabolic comets of
qosc>3.1AU and original inverse semi-major axes (1/aori) less than
0.000100/AU.
exceptions: C/2008 S3, C/2009 F4, C/2010 S1 and C/2010 U3, all four
were still observable at the end of 2013.
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Acknowledgements:
Malgorzata Krolikowska, mkr(at)cbk.waw.pl
(End) M. Krolikowska [Space Research Centre PAS], P. Vannier [CDS] 03-Jun-2014