HR 6927

Basic data :
* chi Dra -- Spectroscopic Binary Origin of the objects types : (Ref) Object type as listed in the reference "Ref" (acronym) Object type linked to the acronym according to the original reference () Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases Other object types: * (*,AG,...), PM* (2016ApJ,Ci,...), ** (**,CCDM,...), X (2E,RX,...), SB* (2013AJ,SBC7,...), IR (IRAS,IRC,...), MIR (AKARI,WISEA), V* (NSV), UV (TD1), NIR (2MASS) Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" : ra dec : right ascension and declination (unit and frame defined according to your Output Options) Grey values are increasing the original precision due to the computation of frame transformations (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam) [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue), position angle (in degrees North celestial pole to East) quality : flag of quality E ≥ 10" D : 1-10" (and some old data) C : 0.1-1" B : 0.01-0.1" + 2MASS, Tyc A : VLBI, Hipparcos bibcode : bibcode of the coordinates reference ICRS coord. (ep=J2000) : 18 21 03.38255 +72 43 58.2518 (Optical) [ 9.06 8.26 88 ] A 2007A&A...474..653V Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" : ra dec : right ascension and declination (unit and frame defined according to your Output Options) Grey values are increasing the original precision due to the computation of frame transformations (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam) [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue), position angle (in degrees North celestial pole to East) quality : flag of quality E ≥ 10" D : 1-10" (and some old data) C : 0.1-1" B : 0.01-0.1" + 2MASS, Tyc A : VLBI, Hipparcos bibcode : bibcode of the coordinates reference FK4 coord. (ep=B1950 eq=1950) : 18 21 57.49103 +72 42 42.0082 [ 9.06 8.26 88 ] Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" : ra dec : right ascension and declination (unit and frame defined according to your Output Options) Grey values are increasing the original precision due to the computation of frame transformations (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam) [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue), position angle (in degrees North celestial pole to East) quality : flag of quality E ≥ 10" D : 1-10" (and some old data) C : 0.1-1" B : 0.01-0.1" + 2MASS, Tyc A : VLBI, Hipparcos bibcode : bibcode of the coordinates reference Gal coord. (ep=J2000) : 103.45634735 +28.05705682 [ 9.06 8.26 88 ] Syntax of proper motions is : "pm-ra pm-dec [error ellipse] quality bibcode" pm-ra : mu-ra*cos(dec) (expressed in the ICRS system in mas/yr) pm-dec : mu-dec (expressed in the ICRS system in mas/yr) [error ellipse] : error major axis and minor axis (in mas), orientation angle (in deg) quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality) bibcode : bibcode of the proper motion reference Proper motions mas/yr : 531.21 -349.71 [1.03 0.94 0] A 2007A&A...474..653V Syntax of radial velocity (or/and redshift) is : "value [error] (wavelength) quality bibcode" value : radial velocity or/and redshift (Heliocentric frame) according to your Output Options (redshift may be not displayed if the data value is <0 and the database inside value is a radial velocity) [error] : error of the corresponding value displayed before (wavelength) : wavelength range of the measurement : Rad, mm, IR, Opt, UV, Xray, Gam or  '∼'(unknown) quality : flag of quality ( A=best quality -> E=worst quality, ∼=unknown quality) bibcode : bibcode of the value's origin Radial velocity / Redshift / cz : V(km/s) 31.90 [0.14] / z(~) 0.000106 [0.000000] / cz 31.90 [0.14]    A 2004A&A...424..727P Syntax of parallax is : 'value quality [error] bibcode' value : parallax value quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality) [error] : mean error bibcode : bibcode of the parallax reference Parallaxes (mas): 124.11 [0.87] A 2007A&A...474..653V Spectral type is made of 3 parts: %coding is composed of 4 parts : the spectral type, which is made of a temperature class, eventually a luminosity class (roman number) and/or spectral peculiarities; a quality letter: A=best quality→E=worst quality, {� } =unknown quality % a quality letter: A=best quality -> E=worst quality, {� } =unknown quality bibcode : bibcode of the spectral type reference Spectral type: F7V C 2001AJ....121.2148G Syntax of fluxes (or magnitudes) is : "filter-name (System) flux-value [error] quality MultVarFlags bibcode" filter-name : U, B, V, R, I, G, J, H, K, u, g, r, i, z (System) : may be AB (default is Vega) flux-value : value of flux or magnitude [error] : error value quality : flag of quality of the flux value ( A=best quality -> E=worst quality, {� } =unknown quality) MultVarFlags : Mult is zero or one char (J) for joined photometry ; Var can be zero or two chars (V[0-4]) bibcode : bibcode of the flux reference Fluxes (9) : U 4.010 [0.010] C 1984A&AS...57..357O B 4.070 [0.007] C 1993A&AS..100..591O V 3.580 [0.009] C 1993A&AS..100..591O R 3.14 [~] C 2002yCat.2237....0D G 3.387717 [0.004770] C 2022yCat.1355....0G I 2.83 [~] C 2002yCat.2237....0D J 2.50 [~] C 2002yCat.2237....0D H 2.22 [~] C 2002yCat.2237....0D K 2.18 [~] C 2002yCat.2237....0D	SIMBAD within arcmin ', {sourceSize:12, color:'#30a090'})); aladin.on('objectClicked', function(object) { var objName=object.data.MAIN_ID; aladin.showPopup(object.ra,object.dec,'',''+ objName+''); });" title="Show Simbad objects"> Overlay points in this preview 2MASS DSS SDSSXMMIRACIRISGALEX All (CDSPortal) Send to within arcsec The VizieR photometry tool allows for easy visualization of photometry points extracted around the Simbad position from photometry-enabled catalogues in VizieR. The search radius has to be specified by the user. It is currently limited to a maximum of 30 arcsec. It depends mostly on the precision or quality of the coordinates (SIMBAD and VizieR catalogs), the resolution of the images from which the sources were extracted, source extent, and source crowding. Suggestions are: crowded field: 0.5 to 1.5 arcsec, 3 arcsec otherwise; uncertain coordinates (SIMBAD quality E or coordinates without reference): 5 to 30 arsec (risky!).
Some important notes on this object about identifications and objects associations. notes: * chi Dra B = GJ 713 B = WDS J18211+7244Ab. Not to be confused with WDS J18211+7244B

* chi Dra	GC 25122	LTT 15438	TIC 341873045
* chi Dra A	GCRV 10880	2MASS J18210342+7243582	TYC 4437-1491-1
* 44 Dra	GEN# +1.00170153	N30 4088	UBV 15693
* chi Dra B	GJ 713 B	NLTT 46426	UBV M 22972
** LAB 5	GJ 713 A	NSV 10749	USNO-B1.0 1627-00135815
** BUP 182A	GJ 713	PLX 4245	USNO 878
AG+72 496	HD 170153	PMC 90-93 494	WDS J18211+7244Aa,Ab
AKARI-IRC-V1 J1821042+724356	HIC 89937	PPM 9830	WDS J18211+7244A
ASCC 49345	HIP 89937	RAFGL 2144S	WEB 15359
BD+72 839	HR 6927	ROT 2608	WISEA J182104.61+724354.5
CCDM J18211+7245A	IDS 18229+7241 A	RX J1821.0+7243	Zkh 274
Ci 20 1087	IRAS 18220+7242	1RXS J182103.0+724342	[TSA98] J182101.59+724357.01
CSI+72 839 1	IRC +70144	SAO 9087	Gaia DR2 2266693630693473024
2E 1822.0+7242	JP11 2982	SBC7 686	Gaia DR3 2266693630693936512
2E 4068	LFT 1413	SBC9 1058
FK5 695	LHS 3379	SKY# 33473
GAT 106	LSPM J1821+7243	TD1 22471

References (400 between 1850 and 2024) (Total 400) Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system). Follow new references on this object

Collections of Measurements

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : HR 6927

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