hd 121370

Basic data :
* eta Boo -- 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,...), X (1AXG,1E,...), ** (**,BDS,...), SB* (2004A&A,SBC7,...), PM* (LSPM,LTT,...), IR (IRAS,IRC,...), 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) : 13 54 41.07892 +18 23 51.7946 (Optical) [ 10.02 6.42 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 FK4 coord. (ep=B1950 eq=1950) : 13 52 18.16653 +18 38 51.3344 [ 10.02 6.42 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) : 005.28851890 +73.03032161 [ 10.02 6.42 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 : -60.95 -356.29 [1.14 0.73 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) 5.771110 [0.007471] / z(spectroscopic) 0.000019 [0.000000] / cz 5.77 [0.01]    (NIR) A 2020AJ....160..120J 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): 87.75 [1.24] 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: G0IV B 1989ApJS...71..245K 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 3.440 [0.010] C 1984A&AS...57..357O B 3.250 [0.007] C 1991A&AS...89..415O V 2.680 [0.009] C 1991A&AS...89..415O R 2.24 [~] C 2002yCat.2237....0D G 2.4467 [0.0158] C 2018yCat.1345....0G I 1.95 [~] C 2002yCat.2237....0D J 1.67 [~] C 2002yCat.2237....0D H 1.39 [~] C 2002yCat.2237....0D K 1.485 [0.170] D 2003yCat.2246....0C	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: * eta Boo B should not be confused with WDS J13547+1824B

* eta Boo	GEN# +1.00121370	NLTT 35643	TIC 367758676
* 8 Boo	GES J13544102+1823474	NSV 19993	TYC 1470-1157-1
** SHJ 169A	GJ 534	PLX 3175	UBV 12376
AG+18 1285	GJ 534 A	PLX 3175.00	UBV M 19832
AP J13544106+1823514	GJ 534 B	PMC 90-93 365	USNO-B1.0 1083-00239773
ASCC 869594	HD 121370	PPM 130166	USNO 849
1AXG J135440+1823	HIC 67927	RAFGL 4923S	uvby98 100121370
BD+19 2725	HIP 67927	RAVE J135441.1+182352	WDS J13547+1824A
BDS 6670 A	HR 5235	ROT 2011	WEB 11935
CCDM J13547+1824A	IDS 13499+1854 A	RX J1354.7+1824	YZ 18 5045
CSI+19 2725 1	IRAS 13522+1838	RX J1354.6+1824	Zkh 205
1E 1352.3+1838	IRC +20267	1RXS J135441.2+182410	[HFE83] 987
2E 3150	JP11 2455	SAO 100766	[TSA98] J135440.09+182358.11
2E 1352.3+1838	LSPM J1354+1823	SBC7 503	[TSA98] J135439.99+182321.10
EXO 1352.3+1838	LTT 14060	SBC9 794	[ZEH2003] RX J1354.6+1824 1
FK5 513	2MASS J13544106+1823514	SKY# 25509	Gaia DR2 1244946371540223872
GC 18805	N30 3162	SRS 30513
GCRV 8204	NAME Muphrid	TD1 17144

References (692 between 1850 and 2023) (Total 692) 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

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External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : hd 121370

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