J/PAZh/45/35 Orbits of 451 wide visual double stars (Izmailov, 2019)
Orbits of 451 wide visual double stars.
Izmailov I.S.
<Pis'ma Astron. Zh. 45, 35 (2019)>
=2019PAZh...45...35I 2019PAZh...45...35I (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Binaries, orbits
Keywords: visual double stars - orbits
Abstract:
Based on positional observations, we have determined the orbits of 130
visual double stars for the first time and improved the orbits of 321
stars. The histogram of eccentricities for all of the derived orbits
corresponds to the relation f=2e. The period distribution has two
pronounced maxima at P∼200 and 550yr. The ephemeris relative
positions and their errors have been calculated for the next three
years.
Description:
We present orbit 451 wide visual double stars obtained by the method
of Thiele-Innes.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 319 451 Orbital elements, solution without weights
table2.dat 319 422 Orbital elements, solution with weights
table3.dat 166 87844 Sets of possible orbits, solution without weights
table4.dat 166 81520 Sets of possible orbits, solution with weights
table5.dat 119 451 Orbital ephemerides, solution without weights
table6.dat 119 422 Orbital ephemerides, solution with weights
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See also:
B/wds : The Washington Visual Double Star Catalog (Mason+ 2001-2014)
Byte-by-byte Description of file: table1.dat table2.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- WDS WDS identifier (Cat. B/wds)
12- 18 A7 --- Disc Discoverer & Number
19- 23 A5 --- Comp Components
24- 33 F10.4 yr P Period
35- 43 F9.4 yr e_P Formal error in P
45- 52 F8.5 arcsec a Semi-major axis (a)
54- 61 F8.5 arcsec e_a Error in a
63- 69 F7.3 deg i Inclination (i)
71- 76 F6.3 deg e_i Error in i
78- 84 F7.3 deg Omega Node (Omega)
85 A1 --- idntf [*] An identified ascending node is
indicated by * (Cat. B/wds)
87- 93 F7.3 deg e_Omega Error in Omega
95-103 F9.4 yr T The time of periastron passage (T)
in fractional Besselian year
105-113 F9.4 yr e_T Error in T
115-121 F7.5 --- e Eccentricity (e)
123-129 F7.5 --- e_e Error in e
131-137 F7.3 deg omega Longitude of periastron (omega)
139-145 F7.3 deg e_omega Error in omega
147-150 I4 yr DL Date of the last observation used
in the orbit calculation
152-158 F7.5 arcsec sd Standard deviation of observations
for this orbit
160-166 F7.5 arcsec osd Standard deviation for the previous
orbit
168-175 A8 --- Ref The previous orbit reference (1)
177-185 F9.4 yr t0 Epoch of the apparent motion
parameters
187-194 F8.5 arcsec rho0 Angular separation for t0 from orbit
196-202 F7.5 arcsec e_rho0 Error in angular separation
204-211 F8.4 deg theta0 Position angle for t0 from orbit
213-220 F8.4 deg e_theta0 Error in position angle
222-230 F9.6 arcsec/yr pmrho Proper Motion (angular separation)
for t0 from orbit
232-239 F8.6 arcsec/yr e_pmrho Error in proper motion pmrho
241-251 F11.5 deg/yr pmtheta Proper Motion (position angle)
for t0 from orbit
253-261 F9.5 deg/yr e_pmtheta Error in proper motion pmtheta
263-269 F7.4 arcsec r Radius of curvature
271-277 F7.4 arcsec e_r Error in radius of curvature
279-284 F6.4 arcsec/yr dVR Difference between radial velocities
for t0 from orbit
286-291 F6.4 arcsec/yr e_dVR Error in difference
293-305 F13.11 Msun.arcsec+3 M Sum of mass of stars in mass of Sun
multiplied by parallax3
306-319 F14.11 Msun.arcsec+3 e_M Error in mass
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Note (1): See http://ad.usno.navy.mil/wds/orb6/wdsref.txt
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Byte-by-byte Description of file: table3.dat table4.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- WDS WDS identifier (Cat. B/wds)
12- 18 A7 --- Disc Discoverer & Number
20- 24 A5 --- Comp Components
26- 34 F9.4 yr P Period
35- 43 F9.5 arcsec a Semi-major axis (a)
45- 51 F7.3 deg i Inclination (i)
53- 59 F7.3 deg Omega Node (Omega)
61- 70 F10.4 yr T The time of periastron passage (T)
in fractional Besselian year
72- 78 F7.5 --- e Eccentricity (e)
80- 86 F7.3 deg omega Longitude of periastron (omega)
88- 96 F9.4 yr t0 epoch of the apparent motion parameters
98-105 F8.5 arcsec rho0 Angular separation for t0 from orbit
107-114 F8.4 deg theta0 Position angle for t0 from orbit
116-124 F9.6 arcsec/yr pmrho Proper Motion (angular separation)
for t0 from orbit
128-137 F10.5 deg/yr pmtheta Proper Motion (position angle)
for t0 from orbit
139-145 F7.4 arcsec r Radius of curvature
147-152 F6.4 arcsec/yr dVR Difference between radial velocities
for t0 from orbit
154-166 F13.11 Msun.arcsec+3 M Sum of mass of stars multiplied
by parallax3
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Byte-by-byte Description of file: table5.dat table6.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- WDS WDS identifier (Cat. B/wds)
12- 18 A7 --- Disc Discoverer & Number
20- 24 A5 --- Comp Components
26- 32 F7.4 arcsec rho19 Angular separation for 2019.0
34- 39 F6.4 arcsec e_rho19 Error in angular separation
41- 47 F7.3 deg theta19 Position angle for 2019.0
49- 55 F7.3 deg e_theta19 Error in position angle
57- 64 F8.4 arcsec rho20 Angular separation for 2020.0
66- 71 F6.4 arcsec e_rho20 Error in angular separation
73- 79 F7.3 deg theta20 Position angle for 2020.0
81- 87 F7.3 deg e_theta20 Error in position angle
89- 96 F8.4 arcsec rho21 Angular separation for 2021.0
98-103 F6.4 arcsec e_rho21 Error in angular separation
105-111 F7.3 deg theta21 Position angle for 2021.0
113-119 F7.3 deg e_theta21 Error in position angle
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History:
From Igor Izmailov, i_izmailov(at)mail.ru
Acknowledgements:
This study was performed using of the Washington visual double star
catalog (WDS; Mason et al. 2018) compiled at the US Naval Observatory.
I am deeply grateful to its compilers and to all observers of visual
double stars worldwide whose work yields significant scientific
results.
(End) Igor Izmailov [Pulkovo Obs.], Patricia Vannier [CDS] 19-Dec-2018