J/A+AS/132/237 Double stars measurements (Alzner 1998)
Measurements of double stars 1993.67-1998.13
Alzner A.
<Astron. Astrophys. Suppl. Ser. 132, 237 (1998)>
=1998A&AS..132..237A 1998A&AS..132..237A (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Binaries, orbits
Keywords: binaries: visual - astrometry
Abstract:
624 Micrometer Measurements of 224 pairs with a 32.5 cm Cassegrain,
719 Measurements of 310 double stars with a 360 mm Newtonian are
given.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 76 311 624 Measurements of 224 double stars at
the 32.5cm Cassegrain.
table2.dat 92 150 Residuals of 147 orbits from table1.dat
table3.dat 72 344 719 measures of 310 double stars with a 360mm
Zeiss-Newtonian 1993.67-1996.50
table4.dat 93 117 Residuals of 106 orbits and notes from table3.dat
--------------------------------------------------------------------------------
See also:
J/A+AS/132/253 : 9 visual double stars orbital elements (Alzner 1998)
Byte-by-byte Description of file: table1.dat table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 I5 --- ADS ? ADS number
6- 9 A4 --- m_ADS Multiplicity index on ADS
11- 17 A7 --- Name Star name
19- 20 I2 h RAh Right ascension (J2000.0)
22- 25 F4.1 min RAm Right ascension (J2000.0)
27 A1 --- DE- Declination sign
28- 29 I2 deg DEd Declination (J2000.0)
31- 32 I2 arcmin DEm Declination (J2000.0)
34- 40 F7.2 yr Obs Observation date
42- 46 F5.1 deg PA ? Position angle
47 A1 --- n_Sep [se:*rn] Note on PA and Sep (1)
49- 53 F5.2 arcsec Sep ? Separation angle
54 A1 --- u_Sep [:e] Uncertainty flag (:), or elongated (e)
56- 59 A4 --- Nobs Number of observations
61- 65 F5.1 mag dm ? Estimated brightness difference between
the two stars of the pair
66 A1 --- n_dm2 [-] Separation dash when interval
67- 70 F4.1 mag dm2 ? Second value of dm when interval
72- 73 A2 --- n_dm [qi :v?] Note (2)
75 A1 --- Micr [FD] Micrometer type (in table1.dat) (3)
--------------------------------------------------------------------------------
Note (1): r: round
*: companion not seen
s: single
n: no companion seen
e: elong.
- not measured or dm not estimated
':': P.A. values are scattered, or P.A. or distance could not be
measured accurately, mostly in case of faint pairs.
Note (2): v: var
qi: quadrant inverted
Note (3): F: RETEL filar micrometer
D: MECA PRECIS double image micrometer
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- Name ADS number or name
6- 7 A2 --- m_Name Multiplicity index on ADS
8 A1 --- n_Name [*] Note (1)
10- 48 A39 --- Ref References for the data (Authors, date)
49- 55 A7 --- n_Ref Note on Ref (2)
57- 61 F5.1 deg theta ? (O-C) on PA
64- 68 F5.2 arcsec rho ? (O-C) on Sep
70- 74 F5.1 deg theta2 ? (O-C) on PA
77- 81 F5.2 arcsec rho2 ? (O-C) on Sep
83- 86 F4.1 deg theta3 ? (O-C) on PA
88- 92 F5.2 arcsec rho3 ? (O-C) on Sep
93 A1 --- Note [*] *: Individual note in table4.dat (3)
--------------------------------------------------------------------------------
Note (1): *: Because of the considerable dm the star is currently too difficult
for the Cassegrain
Note (2): a: the Elements given in the publication are wrong.
Note (3): Individual notes:
17175 Hall 1949 : requires revision. also measured by CHARA
and Heintz with the same tendency
2236 Heintz 1990 : probably measurement error
2755 Popovic & Pavlovic 1995: The rectilinear solution given by the same
authors for this star is better.
5586 Baize : no other new measures are known
5958 Popovic 1982 : the orbit has to be revised
8884 Alzner 1996 : A longperiodic solution with P=450, T=1928,
a=0.66, e=0.57, i=105, ω=53.5, node=9.6,
favoured by the author, was sent to the
Circular No.128 together with the shortperiodic
one, but was not published there. Shortperiodic
solutions seem to be ruled out now by Heintz'
and Hipparcos' measurements, but also the P=450
orbit does not fit the Hipparcos distance
0.778" well. Any longperiodic orbit will stay
undetermined for many years. No speckle
measurements.
10230 Baize 1983 : The orbit has to be revised
11006 Heintz 1995 : starting retrograde motion?
--------------------------------------------------------------------------------
Acknowledgements: A. Alzner
(End) Patricia Bauer [CDS] 05-May-1998