J/A+AS/110/27 J/A+AS/110/27 Proper motion of LTT stars H Wroblewski C Torres Astron. Astrophys. Suppl. Ser. 110 27 1995 1995A&AS..110...27W 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/83/317 : LTT stars, Dec<-40, 0<RA<4h30 (Wroblewski+ 1990) J/A+AS/92/449 : LTT stars, Dec<-40, 4h30<RA<16h (Wroblewski+ 1992) 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>) Proper motions astrometry stars: kinematics Data are given for 285 LTT stars found on 23 areas, covering 25 square degrees each, south of declination -40deg and right ascension between 16h and 24h. Four stars present differences in proper motion greater than 0.10 arcsec, eleven present differences in position angle >20deg and one presents those differences in both values.

ID Correlative number --- LTT Star number in Luyten's catalogue (LTT) --- Location Location numbers where the first digits refer to the area number and the other refer to the star number in the area --- Vmag V magnitude mag RAh Right ascension B1950.0 h RAm Right ascension B1950.0 min RAs Right ascension B1950.0 s DE- Declination sign --- DEd Declination B1950.0 deg DEm Declination B1950.0 arcmin DEs Declination B1950.0 arcsec RAh2000 Right ascension J2000.0 h RAm2000 Right ascension J2000.0 min RAs2000 Right ascension J2000.0 s DE-2000 Declination sign --- DEd2000 Declination J2000.0 deg DEm2000 Declination J2000.0 arcmin DEs2000 Declination J2000.0 arcsec pm Annual proper motion (J2000.0) arcsec/yr e_pm rms uncertainty on pm arcsec/yr pmPA Position angle (J2000.0) of proper motion deg Dpm Comparison of our proper motions with the LTT proper motions in sense LTT minus ours. arcsec Remark Remarks number=1 The annual proper motions, and the position angles, given in table1 are the means of the two values obtained from the plate pairs; 19 LTT stars were common to the overlapped areas mentioned above. For them, the results given in table1 (indicated by 4 in column Remark) correspond to the means of the values obtained from four plate pairs. One proper-motion star is common to three overlapped areas, for it the results given in the same table (indicated by 6 in column Remark) correspond to the mean of the values obtained from six plate pairs. 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 121 (LTT 8146), 137 (LTT 8323), 146 (LTT 8382), 201 (LTT 8890) and 218 (LTT 8990) show considerable differences (>0.10"). On the other hand, stars 9 (LTT 6751), 37 (LTT 7432), 41 (LTT 7459), 59 (LTT 7572), 65 (LTT 7619), 105 (LTT 8034), 133 (LTT 8285), 137 (LTT 8323), 144 (LTT 8367), 194 (LTT 8859), 223 (LTT 9027) and 260 (LTT 9645) identified by (1) in column Remarks, show values of position angles that differ by more than 20deg. It is also important to note that the stars 27 (LTT 7391), 273 (LTT 9783) and 276 (LTT 9792), indicated with (2) in column Remarks, were not found in the position given by Luyten's Catalog. The stars LTT 7365, LTT 7367, LTT 7371, LTT 7899, LTT 7973, LTT 8213 and LTT 8388 were not found in our plates; from those stars LTT 7973 has the same name (-51 12417) than LTT 7986. We could not resolve in our plates the stars LTT 7510 and LTT 8855 from their companion stars LTT 7509 and LTT 8854 respectively. The star LTT 9141 appear in our plates as a double star. --- Patricia Bauer CDS 1994Nov10 J_A+AS_110_27.xml