LHS 57

Query : LHS 57

Basic data :
NAME Barnard's star -- BY Dra Variable
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: 		* (2015ApJS,BD,...), PM* (2016ApJ,Ci,...), V* (CSV,NSV,...), BY* (2017ARep), ** (CCDM), X (1E), NIR (2MASS), MIR (WISEA), IR (IRAS)
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) : 		17 57 48.4984700685 +04 41 36.113879676 (Optical) [ 0.0262 0.0290 90 ] A 2020yCat.1350....0G
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) : 		17 55 22.7081614789 +04 33 14.367378545 [ 0.0262 0.0290 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) : 		031.0087027177046 +14.0626510150033 [ 0.0262 0.0290 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 : 		-801.551 10362.394 [0.032 0.036 90] A 2020yCat.1350....0G
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) -110.11 [0.0002] / z(spectroscopic) -0.000367 [0.000000] / cz -110.09 [0.00]
   (Opt) A 2018MNRAS.475.1960F
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): 		546.9759 [0.0401] A 2020yCat.1350....0G
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: 		M4V B 1991ApJS...77..417K
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 (12) :
U 12.497 [~] C 2010MNRAS.403.1949K
B 11.24 [~] C 2010MNRAS.403.1949K
V 9.511 [~] C 2010MNRAS.403.1949K
R 8.298 [~] C 2010MNRAS.403.1949K
G 8.193974 [0.002843] C 2020yCat.1350....0G
I 6.741 [~] C 2010MNRAS.403.1949K
J 5.244 [0.020] C 2003yCat.2246....0C
H 4.83 [0.03] C 2003yCat.2246....0C
K 4.524 [0.020] C 2003yCat.2246....0C
g 10.572 [0.07] D 2012yCat.1322....0Z
r 9.288 [0.02] D 2012yCat.1322....0Z
i 7.756 [0.04] D 2012yCat.1322....0Z
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 Simbad points in this preview
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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!). sed-help-icon
Some important notes on this object about identifications and objects associations.
notes:

  • not BD+04 3561
  • The star with the highest known proper motion.

Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

The count displayed here is the number of children objects.
The list obtained by clicking the button may be larger, as some children may be linked with different references or probability.

%This number is the number of distinct objets linked, by using this button, you will obtain all links (may be more than one) from that object to his children

: 1 		Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (52) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

BD+04 3561a GSC 00425-00184 NAME Barnard's star UCAC4 474-068224
AC2000 146626 GSC 00425-02502 NAME Barnard Star USNO-B1.0 0946-00315199
ASCC 1153178 HIC 87937 NLTT 45718 USNO 347
CCDM J17578+0441A HIP 87937 NSV 9910 USNO 876
Ci 20 1069 IRAS 17553+0438 8pc 549.01 uvby98 000403561
CSI+04-17554 JP11 18 PLX 4098 V* V2500 Oph
CSV 7737 Karmn J17578+046 PLX 4098.00 VVO 6
1E 1755.3+0438 LFT 1385 PM J17578+0441N WEB 14849
GAT 12 LHS 57 StKM 2-1355 WISEA J175747.94+044323.8
GCRV 10392 LSPM J1757+0441 TIC 325554331 Zkh 269
GEN# +0.00403561 LTT 15309 TYC 425-2502-1 [RHG95] 2849
G 140-24 2MASS J17574849+0441405 UBV 15269 Gaia DR3 4472832130942575872
GJ 699 MCC 799 UCAC2 33428712 Gaia DR2 4472832130942575872

References (810 between 1850 and 2024) (Total 810)
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
                Reference summaries :

                from: to:

                 or select by : (not exhaustive, explanation here)

Collections of Measurements


velocities : 13    V* : 4    distance : 3    ROT : 1    Fe_H : 41    PLX : 7    PM : 10    MK : 39   

   

Observing logs


ISO : 9   

   

External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : LHS 57

Link by name to the catalogue in VizieR :

BD+04 3561a AC2000 146626 CCDM J17578+0441A G 140-24 GJ 699
GSC 00425-00184 GSC 00425-02502 HIC 87937 HIP 87937 IRAS 17553+0438
LHS 57 LSPM J1757+0441 2MASS J17574849+0441405 NLTT 45718 NSV 9910
PLX 4098 TYC 425-2502-1 UCAC2 33428712 UCAC4 474-068224 USNO-B1.0 0946-00315199
uvby98 000403561 V* V2500 Oph WISEA J175747.94+044323.8 Gaia DR3 4472832130942575872 Gaia DR2 4472832130942575872

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