Access to Astronomical Catalogues

← Click to display the menu
J/A+AS/83/317  New proper-motion LTT stars Dec←40, 0<RA<4h30 (Wroblewski+ 1990)

New proper motion determination of Luyten catalogue stars (LTT) south of declination -40 and right ascension between 00h 30m. Wroblewski H., Torres C. <Astron. Astrophys. Suppl. Ser. 83, 317 (1990)> =1990A&AS...83..317W (SIMBAD/NED BibCode)
ADC_Keywords: Proper motions Keywords: astrometry - proper motions Abstract: Data are given for 104 LTT stars found on 11 areas, covering 25 squares degrees each, south of declination -40deg and right ascension between 00h and 04h30m. Three stars present differences in proper motion >0.10", six present differences in position angle ≥20deg and one presents those differences in both values. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1 90 104 Positions and relative proper motions
See also: I/98 : NLTT Catalogue (Luyten, 1979) I/87 : LHS Catalogue, 2nd Edition (Luyten 1979) J/A+AS/78/231 : Dec←40, 0<RA<4h30, stars 1 to 144 (Wroblewski+ 1989) J/A+AS/91/129 : Dec←40, 0<RA<4h30, stars 145 to 521 (Wroblewski+ 1991) J/A+AS/105/179 : Dec←40, 16<RA<24h, stars 522 to 1069 (Wroblewski+ 1994) J/A+AS/115/481 : -30<Dec←5, 0<RA<9h, stars 1070 to 1563 (Wroblewski+ 1996) J/A+AS/92/449 : LTT stars, Dec←40, 4h30<RA<16h (Wroblewski+ 1992) J/A+AS/110/27 : LTT stars, Dec←40, 16<RA<24h (Wroblewski+, 1995) J/A+AS/128/457 : LTT stars -5<Dec←30, 0<RA<13h30 (Wroblewski+ 1998) J/A+AS/128/457 : LTT stars -5<DE←30, 0<RA<13h30 (Wroblewski+ 2000) Byte-by-byte Description of file: table1
Bytes Format Units Label Explanations
1- 3 I3 --- Seq [1/104]+ Running number 5- 8 I4 --- LTT Star number in Luyten's catalogue 10- 16 A7 --- Loc Localisation (area and number) 18- 21 F4.1 mag mpg Photographic magnitude, accurate to 0.5mag 23- 24 I2 h RAh Right Ascension 1950 (hours) 26- 27 I2 min RAm Right Ascension 1950 (minutes) 29- 32 F4.1 s RAs Right Ascension 1950 (seconds) 34 A1 --- DE- Declination 1950 (sign) 35- 36 I2 deg DEd Declination 1950 (degrees) 38- 39 I2 arcmin DEm Declination 1950 (minutes) 41- 42 I2 arcsec DEs Declination 1950 (seconds) 44- 45 I2 h RA2000h Right Ascension 2000 (hours) 47- 48 I2 min RA2000m Right Ascension 2000 (minutes) 50- 53 F4.1 s RA2000s Right Ascension 2000 (seconds) 55 A1 --- DE2000- Declination 2000 (sign) 56- 57 I2 deg DE2000d Declination 2000 (degrees) 59- 60 I2 arcmin DE2000m Declination 2000 (minutes) 62- 63 I2 arcsec DE2000s Declination 2000 (seconds) 65- 69 F5.3 arcsec/yr pm Total proper motion 71- 75 F5.3 arcsec/yr e_pm Mean error on pm 77- 81 F5.1 deg pmPA Position angle (North to East) of the proper motion in J2000 equinox 83- 87 F5.2 arcsec Dpm Difference LTT pm minus pm (this work) (1) 89- 90 A2 --- Remaks [1 4] Remarks (2)
Note (1): It can be seen that most proper motions given in LTT are larger than those determined by us. It is important to point out that stars 26 (LTT 703), 54 (LTT 1323), 73 (LTT 1679) and 80 (LTT 1765) show considerable differences (>0.10") Note (2): '4' when proper-motion is the mean of #4 pairs of plates. '1' when LTT and present PA value differ by 20deg or more. Stars 26 (LTT 703), 30 (LTT 932), 35 (LTT 1019), 48 (LTT 1129), 60 (LTT 1403) and 71 (LTT 1634), show values of position angles that differ by 20deg or more. The case of star 60 (LTT 1403) is remarkable for which Lyuten estimates a position angle of 320deg, while our results is 37deg.
History: Prepared via OCR at CDS. References: Luyten W.J. 1957, A Catalogue of 9867 Stars in the Southern Hemisphere with Proper Motions Exceeding 0.2 arcsec Annualy (The Lund Press, Minneapolis, Minnesota). Luyten W.J. 1979, LHS Catalogue, University of Minnesota, Minneapolis, Minnesota. (Cat. I/87)
(End) James Marcout, Patricia Bauer [CDS] 13-Mar-1997
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service

© UDS/CNRS

Contact