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I/245 Orbital Elements of Minor Planets 1998 (Batrakov+ 1997)
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Catalogue of Orbital elements and Photometric parameters of
7316 Minor Planets numbered by 25 November, 1996
Batrakov Yu.V., Shor V.A.
<Institute of Theoretical Astronomy, St. Petersburg, Russia (1997)>
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ADC_Keywords: Minor planets
Description:
The catalogue contains osculating elements of all permanently numbered
minor planets as of November 25, 1996. The elements are given with
respect to the ecliptic plane and equinox J2000 for the standard epoch
JD2451000.5 = 1998 July 6.0 ET. The elements of (719) Albert which is
considered to be lost are given for the epoch when the planet was
discovered. The catalogue data, in general, correspond to those in
"Ephemerides of Minor Planets for 1998", St.Petersburg, 1997 (in
print). Along with these data the catalogue incorporates some
connected information.
(C) Copyright 1997 ITA RAS
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 188 7316 The Elements
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See also:
I/233 : Previous version of the Orbital Elements (November 7, 1995)
I/217 : Previous version of the Orbital Elements (November 18, 1994)
I/204 : Previous version of the Orbital Elements (June 1, 1993)
I/184C : Previous version of the Orbital Elements (November 2, 1990)
I/183B : Previous version of the Orbital Elements (November 13, 1989)
I/145 : Previous version of the Orbital Elements (November 23, 1988)
ftp://ftp.lowell.edu/pub/elgb/astorb.html : the Asteroid
Orbital Elements Database, maintained by Ted Bowell,
Lowell Observatory
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- Planet [1/7316]+ Minor Planet number
8- 11 I4 a Equinox [2000] equinox = 2000 (2000.0)
12- 15 I4 a EpY epoch (year) (1)
16- 17 I2 month EpM epoch (month number) (1)
18- 19 I2 day EpD epoch (day number) (1)
20- 29 F10.6 deg M mean anomaly
30- 39 F10.6 deg omega argument of perihelion
40- 49 F10.6 deg Node node
50- 59 F10.6 deg i inclination to the ecliptic
60- 69 F10.8 --- e eccentricity
70- 81 F12.10 deg/d dmotion mean daily motion
82- 87 F6.2 mag H absolute magnitude, H (2)
89- 93 F5.2 --- G ? slope parameter, G (2)
95-106 12I1 --- Pert Perturbations of planets (3)
107-112 6I1 --- Pert2 [0] reserved for further indications
of perturbing bodies:
113-116 I4 --- Nopp number of oppositions used for improvement
117-120 I4 --- Nobs number of observations used for improvement
121-124 I4 a Year1 the first year of the time interval covered
by the observations used for improvement
125-128 I4 a Year2 the last year of the time interval covered
by the observations used for improvement
129-133 F5.1 arcsec rms ?=0.0 Mean-root-square or maximum residual
(4)
134-139 A6 --- Source code for the source of elements (5)
140-156 A17 --- Name name or preliminary designation of the
planet
164-181 A18 --- Author author of the elements
182 I1 --- Unum [0/9]? Uncertainty number (6)
183-188 A6 "YYMMDD" Date six-figure code of the date when the
elements have been recorded in the ITA
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Note (1): The elements are given with respect to the ecliptic plane and
equinox J2000 for the standard epoch JD2451000.5 = 1998 July 6.0
(see Description above)
Note (2): The predicted apparent magnitude V is computed by
V = H + 5.log(R.r) - 2.5log((1-G)Phi1 + G.Phi2)
where R and r are the heliocentric and geocentric distances,
and the phase functions Phi1 and Phi2 are related to the solar phase
angle {beta} (Phi1 = Phi2 = 1 when {beta}=0; see details in
Minor Planet Circulars 10193-10194 or Epemerides of Minor Planets).
When the G column is blank, the default value of the slope parameter
is equal to 0.15 . In the present catalogue the H and G values are
given in accordance with new listing (see Minor Planet Circular 28103
- 28116) which updates that published in MPC 17256 - 17273 and in EMP
for 1992 - 1997.
Note (3): code consisting of zeros and ones; 1 in i-th position of the
code means that perturbations from the i-th major planet (counting
from Mercury to Pluto) have been taken into account when determining the
elements; 10-th to 12-th positions of the code are used for indication
of perturbations from Ceres, Pallas, Vesta.
Note (4): mean-root-square residual or maximum residual of
observations with respect to set of elements fitted by least
squares. In the last case 50 is added to the absolute value of the
residual.
Note (5): code for the source of elements consisting of one or two letters
and four or five digits; the letters MP and four digits or M and five
digits stand for the Minor Planet Circular and the number of page; the
letters EP and four digits stand for the Ephemerides of Minor Planets
and the year.
Note (6): this quantity, introduced in Minor Planet Circular 24597
<http://cfa-www.harvard.edu/cfa/ps/services/24597.html> 1995 Feb. 15;
it is related, on a logarithmic scale, to the possible in-orbit
longitudinal runoff with time and is represented by an integer from
0 (for a superbly precise computation) to 9 (where the uncertainty
can cover the whole sky).
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Author's address:
Yu.V.Batrakov & V.A.Shor <shor@ita.spb.su>
Institute of Theoretical Astronomy
Russian Academy of Sciences
Naberezhnaya Kutuzova, 10,
191187 St.Petersburg, Russia
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(End) V.A.Shor [ITA], Francois Ochsenbein [CDS] 18-Jul-1997