NLTT ivo://nasa.heasarc/nltt NASA/GSFC HEASARC Luyten 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Star This catalog (Luyten 1979, 1980) is a collection of stars on more than 800 Palomar Proper Motion Survey plates found to have relative annual proper motions exceeding 0.18 arcsec. The motions have been determined by Luyten and his coworkers by either hand blinking and measuring or with the automated- computerized scanner and measuring machine built by Control Data Corporation and located at the University of Minnesota. The new catalog replaces the LTT Catalogues (Luyten 1957, 1961, 1962), wherein stars in the Bruce Proper Motion Survey discovered to have motions exceeding 0.2 arcsec had been compiled. For further information on the NLTT Catalogue itself, including discussions of positional errors, estimation of magnitudes, star designations used in the catalog, completeness, and accuracy of the measured motions, the introduction to the published NLTT (see Volume I) should be consulted. The First Supplement to the NLTT Catalogue (Luyten and Hughes 1980) is the result of continued plate analysis and measurements during printing of the NLTT. The Supplement contains data for 398 stars having motions larger than 0.179 arcsec annually. Duplicate entries were removed from the HEASARC implementation of this catalog in June 2019. This is a service provided by NASA HEASARC . 1980LP.....55....1L https://heasarc.gsfc.nasa.gov/W3Browse/all/nltt.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=nltt& GET text/xml 180 99999 true 221.442694051335 -89.1419168458164 0.0833333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=nltt GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_nltt&Action=More+Options&Action=Parameter+Search&ConeAdd=1 STAR CATALOG 0.0833333333333333 Radio public nltt NLTT Catalog & First Supplement name Object Designation meta.id;meta.main char nullable prec_flag Right Ascension Precision Flag char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable dec Declination degree pos.eq.dec;meta.main double nullable tot_proper_motion Relative Proper Motion (annual) arcsec/yr float nullable angle Proper Motion Angle (degree) degree int nullable photmag Photographic Magnitude float nullable class Browse Object Classification src.class short nullable "__x_ra_dec" System unit vector column double nullable "__y_ra_dec" System unit vector column double nullable "__z_ra_dec" System unit vector column double nullable "__row" System index column char nullable supplement_flag Supplemental Data char nullable proper_motion_flag Proper Motion Uncertainty Flag char nullable dec_j2000 Declination J2000 in Sexagesimal Format char nullable ra_j2000 Right Ascension J2000 in Sexagesimal Format char nullable lii Galactic Longitude degree pos.galactic.lon double nullable angle_flag Angle Uncertainty Flag char nullable photmag_flag Photographic Magnitude Uncertainty Flag char nullable remarks Additional Notes char nullable addenda_flag Flags changes from original char nullable bii Galactic Latitude degree pos.galactic.lat double nullable redmag_flag Uncertainty Flag for Red Magnitude char nullable redmag Red Magnitude float nullable spect_type Spectral Type src.spType char nullable