J/A+AS/132/253 9 visual double stars orbital elements (Alzner 1998)
Orbital elements of 9 visual double stars
Alzner A.
<Astron. Astrophys. Suppl. Ser. 132, 253 (1998)>
=1998A&AS..132..253A 1998A&AS..132..253A
ADC_Keywords: Stars, double and multiple ; Binaries, orbits
Keywords: binaries: visual - astrometry
Abstract:
Orbital elements and ephemerides for 9 visual double stars are given.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table.dat 160 10 General parameters
bu151s.dat 93 24 Bu 151 residuals: speckle measurements
bu151v.dat 93 119 Bu 151 residuals: visual measurements
hu39l.dat 94 16 Hu 39 residuals: low excentricity variant data
hu39h.dat 94 16 Hu 39 residuals: high excentricity variant data
stf1130.dat 93 24 STF 1130 residuals
stf2434.dat 92 31 STF 2434 residuals
stt229.dat 93 50 STT 229 residuals
stt363.dat 93 28 STT 363 residuals
stt448.dat 93 34 STT 448 residuals
stt53.dat 93 34 STT 53 residuals
stt89.dat 94 38 STT 89 residuals
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See also:
J/A+AS/132/237 : Double stars measurements (Alzner 1998)
Byte-by-byte Description of file: table.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Name
10- 18 A9 --- Names Other name
20- 21 I2 h RAh Right ascension (J2000.0)
23- 26 F4.1 min RAm Right ascension (J2000.0)
28 A1 --- DE- Declination sign
29- 30 I2 deg DEd Declination (J2000.0)
32- 33 I2 arcmin DEm Declination (J2000.0)
35- 38 F4.2 mag Vmag1 Visual magnitude of the primary
40- 44 F5.2 mag Vmag2 Visual magnitude of the secondary
45- 48 A4 --- SpT Spectral type
50- 54 F5.2 mas Plx ? Trigonometric parallax from Hipparcos
56- 64 F9.6 deg/yr Prec Precession factor for J2000
66- 72 F7.2 yr P Orbital period
74- 78 F5.3 arcsec a Semi-major axis
80- 84 F5.1 deg i Orbit inclination
86- 90 F5.1 deg W Longitude of ascending node Ω, J2000
92- 98 F7.2 yr T0 Time of perihelion passage
100-104 F5.3 --- e Orbit eccentricity
106-110 F5.1 deg w Longitude of perihelion ω
112-117 F6.4 mas Pdyn ? Dynamical parallax
119-122 F4.2 Msun Mtot ? Total mass of the binary
124-160 A37 --- Com Comments
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Byte-by-byte Description of file: bu*.dat hu*.dat s*.dat
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Bytes Format Units Label Explanations
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1- 8 F8.3 yr Date Observation date
9 A1 --- n_Date [*] In stt89.dat, 1896. for 1896-1898
10- 14 F5.1 deg PA ? Observed position angle θ
15- 16 A2 --- n_PA [?r*s ed] Note on PA (1)
18- 22 F5.3 arcsec Sep ? Observed separation ρ
23- 24 A2 --- n_Sep [:e?o ] Note on Sep (1)
26- 27 I2 --- Nobs ? Number of observations
28 A1 --- --- [,]
29- 30 I2 --- Nobs2 ? Second number of observations
31 A1 --- n_Nobs [m] m: many nights
32- 80 A49 --- Obs Observators
82- 86 F5.1 deg theta (O-C) on PA Δθ
88- 93 F6.3 arcsec rho ? (O-C) on Sep Δρ
94 A1 --- u_rho [)] Uncertainty flag on the residuals
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Note (1): abbreviations mean the following:
: = uncertain value
r = round
* = perhaps elong. in P.A. 285
s = single
ed = elongation doubtful
e = elongated
o = oval
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Acknowledgements: A. Alzner
(End) Patricia Bauer [CDS] 05-May-1998