Spectroscopic Binary Orbits Ninth Catalog (Dynamic Version) SpecBinOrbits ivo://nasa.heasarc/sborbitcat NASA/GSFC HEASARC Pourbaix et al. 2026-04-03 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Star The Ninth Catalog of Spectroscopic Binary Orbits (SB9) continues the series of compilations of spectroscopic orbits carried out over the past 35 years by Batten and collaborators, e.g., the 8th SBO Catalog (SB8, &lt;a href="https://cdsarc.cds.unistra.fr/ftp/cats/V/64"&gt;CDS Catalog V/64&lt;/a&gt;) of Batten, Fletcher and MacCarthy 1989, Publ. DAO, 17, 1. This catalog was regularly updated through July 2024. This version of SB9 contains orbits for over five thousand binary systems. (Notice that the numbers of orbits and binary systems included in this version differ from those in the referenced publication, as the latter reflected the 2004 May 1 status of the catalog, when it had 2694 orbits for 2386 binary systems.) There is a more recent, actively maintained, online version of this catalog available at &lt;a href="http://www.astro.ulb.ac.be/sbx/"&gt;http://www.astro.ulb.ac.be/sbx/&lt;/a&gt;. This table was created by the HEASARC based on the &lt;a href="https://cdsarc.cds.unistra.fr/ftp/cats/B/sb9"&gt;CDS Catalog B/sb9&lt;/a&gt;, using the files main.dat, alias.dat, orbits.dat and notes.txt. The CDS updates it regularly, and this HEASARC version is accordingly updated within a week of such updates. This is a service provided by NASA HEASARC . 2004A&amp;A...424..727P https://heasarc.gsfc.nasa.gov/W3Browse/all/sborbitcat.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=sborbitcat& GET text/xml 180 99999 true 320.79104167 -87.05227778 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=sborbitcat GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_sborbitcat&Action=More+Options&Action=Parameter+Search&ConeAdd=1 STAR CATALOG 0.0166666666666667 Optical public sborbitcat Spectroscopic Binary Orbits Ninth Catalog (Dynamic Version) omega Argument of Periastron (degree) degree src.orbital.periastron double nullable period_type Flag [a] Indicates Assumed Period meta.code;time.period;src.orbital char nullable semi_amplitude_1_flag Flag [:] Indicates Uncertainty on Velocity Amplitude of Primary meta.code;phys.veloc.orbital char nullable lii Galactic Longitude degree pos.galactic.lon double nullable reference_time_flag Non-Zero Value Indicates Time of Non-Periastron Phenomena (e.g., Eclipse) meta.code;time.epoch double nullable radial_velocity_1_obs Number of Observations of Radial Velocity of Primary meta.number;phys.veloc.orbital short nullable semi_amplitude_1 Velocity Amplitude of Primary (km/s) km/s phys.veloc.orbital double nullable "__y_ra_dec" System unit vector column double nullable eccentricity_type Flag [a] Indicates Assumed Eccentricity, [>] Indicates Error Greater Than Value meta.code;src.orbital.eccentricity char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable semi_amplitude_1_type Flag [a] Indicates Assumed Amplitude, [>] Indicates Error Greater Than Value meta.code;phys.veloc.orbital char nullable orbit_number Orbit Number meta.code;src.orbital short nullable ref_orbit Reference Bibcode(s) of Orbit Publication meta.bib;time.period;src.orbital char nullable "__row" System index column char nullable system_number System Number (SB8 Number When <= 1469) meta.id short nullable app_mag_2 Magnitude of Component 2 mag phot.mag;em.opt double nullable semi_amplitude_2_flag Flag [:] Indicates Uncertainty on Velocity Amplitude of Secondary meta.code;phys.veloc.orbital char nullable alt_names Other Designations for Source char nullable spect_type_2 MK Spectral Type Component 2 src.spType char nullable system_velocity_flag Flag [:] Indicates Uncertainty in System Velocity meta.code;phys.veloc char nullable name Source Designation (from HIP When Existing) meta.id;meta.main char nullable bii Galactic Latitude degree pos.galactic.lat double nullable orbit_note Note Concerning Orbit Determination char nullable semi_amplitude_2 Velocity Amplitude of Secondary (km/s) km/s phys.veloc.orbital double nullable orbit_grade Grade of Orbit (0=Poor, 5=Definitive) meta.code.qual double nullable system_velocity_type Flag [a] Indicates Assumed System Velocity meta.code;phys.veloc char nullable reference_time Epoch for the Computation of Phases, Usually the Time of Periastron Passage (JD) JD time.epoch double nullable reference_time_error Mean Error on Reference Time (days) d stat.error;time.epoch double nullable period Period (days) d time.period;src.orbital double nullable eccentricity Orbital Eccentricity src.orbital.eccentricity double nullable app_mag_1 Magnitude of Component 1 mag phot.mag;em.opt double nullable "__z_ra_dec" System unit vector column double nullable contributor Contributor meta.code;obs.observer char nullable radial_velocity_2_obs Number of Observations of Radial Velocity of Secondary meta.number;phys.veloc.orbital short nullable reference_time_type Flag [a] Indicates Assumed Reference Time meta.code;time.epoch char nullable radial_velocity_2_rms RMS Residuals of Radial Velocity of Secondary (km/s) km/s stat.fit.residual;phys.veloc.orbital double nullable "__x_ra_dec" System unit vector column double nullable system_velocity System Velocity (km/s) km/s phys.veloc double nullable component Component Identifier, Used for Higher Multiplicity Systems meta.code.multip char nullable period_error Mean Error on Period (days) d stat.error;time.period;src.orbital double nullable eccentricity_error Mean Error on Eccentricity stat.error;src.orbital.eccentricity double nullable class Browse Object Classification src.class short nullable app_mag_1_band Flag [GJPBVRyrIK] Indicates Filter in Which Component 1 Magnitude Is Given instr.bandpass char nullable semi_amplitude_1_error Mean Error on Velocity Amplitude of Primary km/s stat.error;phys.veloc.orbital double nullable semi_amplitude_2_error Mean Error on Velocity Amplitude of Secondary (km/s) km/s stat.error;phys.veloc.orbital double nullable app_mag_2_band Flag [PBVRyrIK] Indicates Filter in Which Component 2 Magnitude Is Given instr.bandpass char nullable omega_type Flag [a] Indicates Assumed Argument of Periastron meta.code;src.orbital.periastron char nullable b1900_name Source Designation Based on B1900 Position (for Backward Compatibility with SB8) meta.id char nullable spect_type_1 MK Spectral Type Component 1 src.spType char nullable system_velocity_error Mean Error on System Velocity (km/s) km/s stat.error;phys.veloc double nullable radial_velocity_1_rms RMS Residuals of Radial Velocity of Primary (km/s) km/s stat.fit.residual;phys.veloc.orbital double nullable omega_error Mean Error on Omega (degree) degree stat.error;src.orbital.periastron double nullable dec Declination degree pos.eq.dec;meta.main double nullable semi_amplitude_2_type Flag [a] Indicates Assumed Velocity Amplitude of Secondary meta.code;phys.veloc.orbital char nullable