Basic data :
* mu. Sgr -- Blue Supergiant 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: * (1971PW&SO,*,...), ** (ADS,CCDM,...), SB* (SBC7,SBC9), UV (TD1,[SC96]), IR (IRAS,2MASS), s*b (1897AnHar), Em* (EM*), V* (V*) 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 13 45.8088401 -21 03 31.794073 (Optical) [ 0.22 0.16 90 ] 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 FK5 coord. (ep=J2000 eq=2000) : 18 13 45.8105693 -21 03 31.773663 [ 0.22 0.16 90 ] 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 10 46.3241103 -21 04 25.383828 [ 0.22 0.16 90 ] 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) : 010.0032748424 -01.6005326418 [ 0.22 0.16 90 ] 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 : 0.30 -0.48 [0.30 0.19 90] 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) -6.0 [2] / z(~) -0.000020 [0.000007] / cz -6.00 [2.00]    B 1979IAUS...30...57E 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): 0.09 [0.28] 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: B8Iab(e) C 1994AJ....107.1556G 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 3.60 [~] C 2002yCat.2237....0D B 4.07 [~] C 2002yCat.2237....0D V 3.85 [~] C 2002yCat.2237....0D R 3.58 [~] C 2002yCat.2237....0D G 3.6414 [0.0059] C 2018yCat.1345....0G I 3.38 [~] C 2002yCat.2237....0D J 3.272 [0.272] D 2003yCat.2246....0C H 3.178 [0.220] D 2003yCat.2246....0C K 3.19 [~] 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!).

* 13 Sgr	GSC 06276-03093	PLX 4178	TYC 6276-3093-1
* mu. Sgr	HD 166937	PLX 4178.00	UBV M 22737
ADS 11169 A	HIC 89341	PMC 90-93 486	UBV 21651
ALS 4791	HIP 89341	PPM 268080	UCAC4 345-134083
BD-21 4908	HR 6812	ROT 2572	V* mu. Sgr
CCDM J18138-2104A	IDS 18078-2105 A	SACS 397	WDS J18138-2104A
CSI-21 4908 1	IRAS 18107-2104	SAO 186497	WEB 15190
EM* MWC 598	JP11 2948	SBC7 667	YZ 111 7550
FK5 682	LS 4791	SBC9 1033	[B10] 4604
GC 24856	2MASS J18134581-2103319	SKY# 33184	[SC96] GC 491
GCRV 10672	MCW 629	SRS 30682	[SC96] Mis 1153
GEN# +1.00166937A	N30 4047	TD1 21905	Gaia DR2 4093933487667449984
GEN# +1.00314059A	NAME Polis	TIC 117866844

References (11 between 2018 and 2023) (Total 338) 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

velocities (10)

 |typ|    Value    R   m.e.  |A (Nmes)|na,Q,dom ,   res    D| Obs.date | Rem.  |Or|     Reference     |
 ------------------------------------------------------------------------------------------------------
 |v  |   -2.7                |  (    )|s , ,    ,           |          |       |  |1995A&AS..114..269D|
 

rot (3)

 |  Vsini  [  err   ] (mes)|Q|     reference     |
 -------------------------------------------------
 |  45     [        ] (   )|D|2002ApJ...573..359A|
 

plx (4)

 |    plx    :    m.e     R |     reference     |
 ------------------------------------------------
m|   0.11    :   0.98       |1997A&A...323L..49P|
 

pm (5)

 |  pm-ra  [   m.e   ]|  pm-de  [   m.e   ]|syst|     reference     |
 --------------------------------------------------------------------
 |   -5.096[    0.847]|   +2.652[    0.756]|ICRS|2018yCat.1345....0G|
 

mk (17)

 |ds/mss|           Spectral type            |     reference     |
 -----------------------------------------------------------------
 |  /   |B8p                                 |1993yCat.3135....0C|
 

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pos.*Position	J2000	pos.eq*
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Motion	redshift	src.redshift*
	radial velocity	spect.dopplerVeloc*|phys.veloc*
	proper motion	pos.pm*
phot.flux*Flux	Radio	phot.flux*;em.radio*
	IR	phot.flux*;em.IR*|phot.flux*;em.mm*
	Optic	phot.flux*;em.opt*
	High energy	phot.flux*;em.X-ray*|phot.flux*;em.gamma*
phot.mag*|phot.color*|phys.magAbs*Magnitude	magnitude IR (K band) (2mass)	phot.mag*;em.IR.K*
	magnitude Optical (B band) (SDSS G)	phot.mag*;em.opt.B*
	color	phot.color*
	absolute	phys.magAbs*

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iue (60)

 |Homogenized Name:  ComplID   |PROG |CL|D CAM IMAGE A| FES  MD|Obs.da  Time |ExpTim|m|CEB|S|      Comments      |F|     reference     |
 ---------------------------------------------------------------------------------------------------------------------------------------
 |HD 166937       :            |PG2SS|25|L SWP 05785 L|  840 FU|790713 113100|000008| |501|G|C=250,B=22          |*|1996IUEML.C......0I|
 

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