NEW ORBITS                               

  ADS            Name      P (yr)      T       e      W(2000)      1999      Author
 RA 2000 DEC    n (deg)    a (")   i (deg)   w (deg)  Last ob.     2000     
--------------------------------------------------------------------------------------

 1227         A 1913 AB   275.5    2088.9     0.188   117.2     135.4 0.295  MANTE
01345+3440     1.3067       0.33    111.2    94.3    1991.25    134.8 0.297

 --           KUI 39       73.17   2020.48    0.463    63.5     138.3 0.569  MANTE
09175+7715     4.9198       0.592   137.8    67.7    1991.25    134.8 0.562

 --           COU 2416     61.68   1992.74    0.446    81.7      41.0 0.165  MANTE
20151+3742     5.8366       0.283    52.7   221.2    1993.663    49.2 0.189

13611         A 2095 AB   105.51   1916.57    0.890   138.4     151.7 0.233  LING
20157+4339     3.4120       0.454    94.9    94.6    1997.68    151.2 0.236 

 --           COU 537      45.43   1993.67    0.578    63.4     264.1 0.145  DOCOBO
22077+2622     7.9243       0.180    39.5    94.9    1995.607   271.2 0.156  & LING

15707         STT 464    1360.20   1985.74    0.557    51.9     171.6 0.265  LING & 
22113+4010     0.2647       0.900    52.8    94.3    1995.79    173.1 0.268  PRIETO


===================================================================================

                                   ANNOUNCEMENT

The CATALOGUE DE 2700 ETOILES DOUBLES COU is now available. This is the third updated
edition of COU double stars catalogue, revised and including trigonometric parallaxes,
astrometric and photometric parameters measured by Hipparcos satellite for 800 COU
stars.

It can be obtained upon request from:
Observatoire de la Cote d'Azur
P. O. Box 4229
06304 Nice Cedex, France
The price is 400 FFr

 P. Couteau


===================================================================================

                             PAPERS PUBLISHED IN 1998

1)  ABAD, C., DOCOBO, J. A. & DELLA PRUGNA F.: "CCD and micrometric observations of
    visual double stars". Astron. Astrophys. Suppl. Ser. 133, 71-79 (1998)

2)  ALZNER, A.: "Measurements of double stars 1993.67 - 1998.13". Astron. Astrophys.
    Suppl. Ser. 132, 237-252 (1998)

3)  ALZNER, A.: "Orbital elements of 9 visual double stars". Astron. Astrophys.
    Suppl. Ser. 132, 253-254 (1998)

4)  ANGELOV, T.: "On the distribution of visual double stars".
    Serbian Astronomical Journal, 157, 31-34 (1998)

5)  BARLOW, D. J., SCARFE, C. D. & FEKEL, F. C.: "Physical properties of the binary
    star 12 Persei." Astron. J. 115, (6), 2555-2560 (1998)

6)  BENEST, D: "Planetary orbits in the elliptic restricted problem. IV. The ADS 12033
    system". Astron. Astrophys. 332, 1147-1152 (1998)

7)  CARBILLET, M. et al.: "Speckle imaging of binary stars: Use of ratios of twofold
    probability density functions". Astron. Astrophys. Suppl. Ser. 127, 569-580 (1998)

8)  DOCOBO, J. A.: "Micrometer measurements of double stars from the Spanish
    observatories at Calar Alto and Santiago de Compostela". Astron. Astrophys. Suppl.
    Ser. 130, 117 (1998)

9)  DOCOBO, J. A. et al.: "Photometric and polarimetric observations of double and
    multiple stars".  Astrofizika 41, 389-398 (1998)

10) FERNANDES, J. et al.: "Fundamental stellar parameters for nearby visual binary
    stars: $\eta$ Cas, $\xi$ Boo, 70 Oph and 85 Peg". Astron. Astrophys. 338, 455-464
    (1998).

11) FRANZ, O. G. et al. : "The first definitive binary orbit determined with the
    Hubble Space Telescope fine guidance sensors: WOLF 1062 (Gliese 748)" Astron. J.
    116, (3), 1432-1439 (1998)

12) HEINTZ, W.D.: "Observations of double stars. XVIII". Astrophys. J. Suppl. Ser.
    117, 587-598 (1998).

13) HERSHEY, J. L. & TAFF, L. G. : "Hubble Space Telescope fine guidance sensor
    astrometry of the low-mass binary L722-22." Astron. J. 116, (3), 1440-1446 (1998)

14) HUMMEL, C. A. et al. : "Navy prototipe optical interferometer observations of the
    double stars Mizar A and Matar." Astron. J. 116, (5), 2536-2548 (1998)

15) IZMAILOV, I. S. et al.: "Using a CCD camera in Pulkovo programs of observations of
    binary and multiple stars and satellites of major planets with the 26-inch refractor".
    Astron. Letters 24 (5), 665-672 (1998).

16) KIYAEVA, O. V., TOKOVININ, A. A. & KALINICHENKO, O. A.: "The triple system
    ADS 9167". Astron. Letters 24 (6), 753-757 (1998).

17) LING, J. A. & PRIETO, C: "Micrometer measusrements of southern double stars made
    at the national Observatory of Llano del Hato, Venezuela". Rev. Mexicana Astron.
    Astrof. 34, 111-115 (1998)

18) MALKOV, O., PISKUNOV, A. & ZINNECKER, H.: "On the luminosity ratio of pre-main
    sequence binaries". Astron. Astrophys. 338, 452-454 (1998).

19) MARTIN, C. & MIGNARD, F.: "Mass determination of astrometric binaries with
    Hipparcos. II Selection of candidates and results". Astron. Astrophys. 330, 585-599
    (1998)

20) MARTIN, C. et al. : "Mass determination of astrometric binaries with Hipparcos.
    III New results for 28 systems". Astron. Astrophys. Suppl. Ser. 133, 149-162 (1998)

21) MASON, B. D. et al.: "ICCD Speckle Observations of Binary Stars XIX. An
    Astrometric/Spectroscopic Survey of O Stars." Astron. J. 115, (2), 821-847 (1998).

22) MASON, B. D. et al.: "A multiplicity survey of chromospherical active and inactive
    stars." Astron. J. 116, (6), 2965-2974 (1998).

23) OLEVIC, D. & JOVANOVIC, P.: "New and recalculated orbital elements of 5
    double stars". Serbian Astronomical Journal 158, 73-79 (1998)

24) PETR, M. G. et al. : "Binary stars in the Orion trapezium cluster" Astrophys. J.
    500, 825-837 (1998)

25) POPOVIC, G. M.:  "Inclination of the Orbital Planes of Visual Binaries".
    Serbian Astronomical Journal, 157, 13-17 (1998)

26) POPOVIC G. M., PAVLOVIC, R. & ZIVKOV, V.:  "Catalogue of Double Star
    Observations made at the Belgrade Observatory - CDSO". Publ. Astron. Obs. Belgrade,
    60, 114-117 (1998)

27) POPOVIC, G. M. & PAVLOVIC, R.: "Micrometer and CCD measurements of double
    stars (Series 51).", Serbian Astronomical Journal, 158, 67-71 (1998)

28) POURBAIX, D.: "Simultaneous least-squares adjustement of visual and spectroscopic
    observations of binary stars". Astron. Astrophys. Suppl. Ser. 131, 377-382 (1998)

29) SCHOELLER, M. et al.: "Diffraction-limited speckle masking interferometry of
    binary stars with the SAO 6-m telescope". Astron. Letters 24 (3), 283-287 (1998).

30) SHATSKII, N. I.: "The nature of visual components in 82 multiple systems".
    Astron. Letters 24 (2), 257-269 (1998).

31) SHATSKII, N. I. & TOKOVININ, A. A.: "A test of Hipparcos parallaxes on multiple
    stars". Astron. Letters 24 (5), 673-676 (1998).

32) SINACHOPOULOS, D & VAN DESSEL, E.: "CCD astrometry and UBV photometry of visual
    binaries. II. Visual double stars with mainly G-type primaries and relatively
    small angular separation". Astron. Astrophys. Suppl. Ser. 130, 229-304 (1998)

33) THOREL J.-C.: "Measures of visual double stars made with the 50 cm refractor at
    the Nice Observatory (2nd series)". Astron. Astrophys. Suppl. Ser. 132, 29-30
    (1998)

34) TOKOVININ, A. A.: "On the distrubution of orbital eccentricities of wide visual
    binary stars". Astron. Letters 24 (2), 178-179 (1998).

35) TOKOVININ, A. A.: "New spectroscopic components in six multiple systems".
    Astron. Letters 24 (3), 288-295 (1998).

36) TOKOVININ, A. A., SHATSKII, N. I. & MAGNITSKII, A. K.: "ADS 9731: A new sextuple
    system". Astron. Letters 24 (6), 795-801 (1998).

37) VALTONEN, M. J.: "Mass ratios in multiple star systems". Astron. Astrophys.
    334, 169-172 (1998)
 
38) WORLEY, C. E. & MASON, B. D. : "Micrometer measures of double stars." Astron.
    J. 116, (2), 971-930 (1998)

===================================================================================

The deadline for contributions to Information Circular No. 138 is:
    
                            June 15th 1999                         


         J. A. Docobo (oadoco@usc.es)
         J. F. Ling (oafana@usc.es)
         Fax: (81) 59 70 54

         Observatorio Astronomico "R. M. Aller"
         P. O. Box 197
         Universidade de Santiago de Compostela
         SPAIN


ISSN: 1024-7769