I/130 LDS Catalogue: Doubles with Common Proper Motion (Luyten 1940-87) ================================================================================ The LDS Catalogue: Double Stars with Common Proper Motion Luyten W.J. ================================================================================ ADC_Keywords: Proper motions ; Stars, double and multiple Description: This catalogue contains all double stars with common proper motion discovered by Luyten since 1940 up to 1987 (references below). When Luyten had noticed that an entry was duplicated (ref. 8 and 9), only the former LDS number was kept in the data file but with the data given for the latter. The unique exception is LDS 6166, which is a duplicate of LDS 5662, but with an additional component. The systems classified as optical by Luyten were also rejected from the main data files. All the rejected data were put together in a separate file. All coordinates are for the equinox 1950; when the original publication gave another equinox (this is the case for ref. 1), the 1950-coordinates were calculated. The catalogue contains all the systems, sorted by increasing LDS numbers. Duplicate entries and optical systems listed by Luyten were rejected. The catalogue contains 6121 systems, including 87 triple and 1 quadruple systems. The number of records is thus 6210, since each triple system occupies 2 records and the quadruple system 3. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file main.dat 112 6210 The Catalogue rejected.dat 112 46 Data rejected for duplicate numbers or optical systems -------------------------------------------------------------------------------- Byte-by-byte Description of file: *.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 2- 5 I4 --- LDS [1/6181]+= LDS number 6 A1 --- Mult [tq] 't' indicates a system is triple and 'q' it is quadruple. Then, the LDS number is the same for all entries. 8- 9 I2 h RAh Right Ascension 1950 (hours) 11- 14 F4.1 min RAm Right Ascension 1950 (minutes) 15- 16 I2 s RAs [0/60[? Right Ascension 1950 (seconds) (1) 18 A1 --- DE- Declination 1950 (sign) 19- 20 I2 deg DEd Declination 1950 (degrees) 22- 25 F4.1 arcmin DEm Declination 1950 (minutes) 28- 31 F4.1 mag mR1 ?=99.9 Photographic R magnitude of the primary component (99.9 = unknown) 32 A1 --- u_mR1 [:+] Uncertainty flag on mR1 33- 36 F4.1 mag mB1 ?=99.9 Photographic magnitude of the primary component (99.9 = unknown) 37 A1 --- u_mB1 [:+] Uncertainty flag on mB1 38- 40 A3 --- color1 Color class of the primary component 42- 45 F4.1 mag mR2 ?=99.9 photographic R magnitude of the secondary component (99.9 = unknown) 46 A1 --- u_mR2 [:+] Uncertainty flag on mR2 47- 50 F4.1 mag mB2 ?=99.9 photographic magnitude of the secondary component (99.9 = unknown) 51 A1 --- u_mB2 [:+] Uncertainty flag on mB2 52- 54 A3 --- color2 Color class of the secondary component 56- 60 F5.3 arcsec/a pm Annual proper motion, 62- 64 I3 deg pmPA Direction (N to E) of the proper motion (2) 67- 71 F5.1 deg Theta [0/360[? Position angle, see also Quadrant (4) 73- 78 F6.1 arcsec Sep ? Separation between components (4) 79- 80 A2 --- Quadrant [nspf ] Quadrant designation for ref.1 (4) 83-109 A27 --- Remark Short remark and/or other identification (3) 112 I1 --- Ref Reference code (see References section) -------------------------------------------------------------------------------- Note (1): When the seconds are provided, the RAm fractional part is blank Note (2): LDS 3543 has a value of 403deg (outside standard limits) Note (3): the reasons for rejection are in bytes 81-91 in file "reject". A '*' refers to a remark (see 'Individual Remarks' below) The {Lambda} identifications given in ref.1 were not keypunched. Note (4): Theta, sep and Quadrant blank for LDS 149. LDS 1170 has a value of 440deg (outside standard limits) -------------------------------------------------------------------------------- Individual Remarks: LDS 372 Further observations made with the 36-inch reflector at Tucson render the existence of the faint companion extremely doubtful. LDS 555 Further observations made with the 36-inch reflector at Tucson render the existence of the faint companion extremely doubtful. LDS 846 A companion was announced by van Biesbroek at the Victoria Double Star Conference in 1956, 16th magnitude, red, 1130" distant in 67deg. As such it was included as gamma Leporis C in the LTT catalogue as LTT 2368. When the proper motion was published it was given as 0.63" in 210deg; our own measures on Palomar survey plates with an interval of 15 years, give 0.63" in 207deg thus fully confirming van Biesbroek's measure. However, the proper motion of gamma Leporis itself is given as 0.47" in 219deg, and its parallax as 0.122". The minimum separation of the C component from the brighter pair must therefore be of the order of 9000 astronomical units, and hence the parabolic velocity of the companion would at most be 0.7 km/sec, assuming a total mass of 2.5 for the triple system. The minimum observed velocity must be 6 km/sec, and hence there is no escape from the conclusion that, in spite of the close similarity in direction of the motions gamma Leporis and VBs 1 are not physically connected. LDS 1338 Close companion (14.9 mag, m, 34deg, 7") is optical. LDS 2095 Bright star is ADS 111, 6.0 - 6.2,88deg,172. LDS 2231 Bright star is VA 402. LDS 2721 These are the pr, and nf, of a triangle, brighter star in between. LDS 2730 If this is a physical pair, the separation is of the order of 20,000 a.u. LDS 2842 br star. =ADS 2481,optical? LDS 3035 angles increasing LDS 3097 BC maybe physical but A seems to have a larger motion LDS 5175 angles decreasing about 1deg/yr. Historical Notes: Keypunched at CDS in 1987 * 15-Jun-1994: Corrected a few errors (existing in the publication) LDS 3593: third decimal place of proper motion (pm) set to blank LDS 4309: "+" embedded in DEm LDS 4871: RAm was -1 LDS 5644: secondary magnitudes were 18.,0 19.1 LDS 5679: third decimal place of proper motion (pm) set to blank LDS 5999: third decimal place of proper motion (pm) set to blank * 04-Feb-1997: ReadMe file standardized, and disentangled Quadrant from Theta values in data files * 19-Sep-1997: a few bad magnitude values (above 90.0) corrected in both main and rejected files. References: [1] Luyten W.J. , Publ. of the Astron. Obs. Univ. Minnesota vol. III part 3 pg 35 (1940) [2] Luyten W.J., Proper motion survey with the 48-inch Schmidt telescope, XXI, Univ. of Minnesota, Minneapolis (1969) [3] Luyten W.J., Proper motion survey with the 48-inch Schmidt telescope, XXV, Univ. of Minnesota, Minneapolis (1970) [4] Luyten W.J., Proper motion survey with the 48-inch Schmidt telescope, XXIX, Univ. of Minnesota, Minneapolis (1972) [5] Luyten W.J., Proper motion survey with the 48-inch Schmidt telescope, XL, Univ. of Minnesota, Minneapolis (1975) [6] Luyten W.J., Proper motion survey with the 48-inch Schmidt telescope, L, Univ. of Minnesota, Minneapolis (1977) [7] Luyten W.J., Hughes H.S, Proper motion survey with the 48-inch Schmidt LV, Univ. of Minnesota, Minneapolis (1980) [8] Luyten W.J., Proper motion survey with the 48-inch Schmidt telescope, LXIV, Univ. of Minnesota, Minneapolis (1984) [9] Luyten W.J., Proper motion survey with the 48-inch Schmidt telescope, LXXI, Univ. of Minnesota, Minneapolis (1987) ================================================================================ (End) J.-L. Halbwachs, F. Ochsenbein [CDS] 04-Feb-1997