* tau CMa

Query : * tau CMa

Basic data :
* tau CMa -- 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: 		EB* (), * (*,ALS,...), ** (**,ADS,...), V* (CSV,NSV,...), SB* (2020A&A,SBC7,...), X (2E,1ES,...), UV (CEL,EUVE,...), Y*O (MPCM), NIR (2MASS), MIR (SSTGLMA), 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) : 		07 18 42.4849951654 -24 57 15.700749738 (Optical) [ 0.3838 0.5987 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) : 		07 16 38.0197558147 -24 51 42.498092403 [ 0.3838 0.5987 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) : 		238.1809156986496 -05.5429604104305 [ 0.3838 0.5987 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 : 		-1.815 -0.496 [0.484 0.767 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) 49.40 [1.4] / z(spectroscopic) 0.000165 [0.000005] / cz 49.40 [1.40]
   (Opt) B 1977ApJ...214..759C
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): 		0.5765 [0.7371] 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: 		O9II C 2014ApJS..211...10S
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 3.26 [~] C 2002yCat.2237....0D
B 4.25 [~] C 2002yCat.2237....0D
V 4.40 [~] C 2002yCat.2237....0D
R 4.44 [~] C 2002yCat.2237....0D
G 4.282144 [0.004055] C 2022yCat.1355....0G
I 4.62 [~] C 2002yCat.2237....0D
J 4.71 [~] C 2002yCat.2237....0D
H 4.769 [0.076] C 2003yCat.2246....0C
K 4.786 [0.024] C 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 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

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

: 1 : 712 Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (57) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

* tau CMa 1ES 0716-24.8 MCW 527 TIC 106347931
* 30 CMa EUVE J0718-24.9 MPCM J071842.48-245715.8 TYC 6541-4204-1
** FIN 313 GC 9736 NGC 2362 23 UBV 7106
** TOK 42 GCRV 4843 NSV 3528 UBV M 32429
** HJ 3948A GEN# +2.23620023 PMSC 07146-2446AP V* tau CMa
ADS 5977 A GOS G238.18-05.54 01 PMSC 07146-2446Aabc WDS J07187-2457Aa,Ab
ALS 14805 GSC 06541-04204 PPM 252114 WDS J07187-2457A
CCDM J07187-2457AP HD 57061 ROT 1174 WEB 7067
CD-24 5176 HIC 35415 1RXS J071841.7-245707 [GM99b] 35
CEL 1763 HIP 35415 SAO 173446 [HJ56] 103
CGO 156 HR 2782 SBC7 302 AAVSO 0714-24
CPD-24 2216 IDS 07146-2446 SBC9 444 Gaia DR3 5616537017987940736
CSV 6576 IRAS 07166-2451 SKY# 13269
2E 1804 JP11 4017 SSTGLMA G238.1809-05.5428
2E 0716.6-2451 2MASS J07184249-2457157 TD1 9746

References (422 between 1850 and 2024) (Total 422)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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                Reference summaries :

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Collections of Measurements


velocities : 107    V* : 1    ROT : 6    Fe_H : 3    PLX : 3    PM : 4    MK : 27   

   

Observing logs


herschel : 2    IUE : 20   

   

External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : * tau CMa

Link by name to the catalogue in VizieR :

ALS 14805 CCDM J07187-2457AP CD-24 5176 CEL 1763 CPD-24 2216
2E 1804 EUVE J0718-24.9 GSC 06541-04204 HD 57061 HIC 35415
HIP 35415 HR 2782 IRAS 07166-2451 2MASS J07184249-2457157 NSV 3528
PPM 252114 1RXS J071841.7-245707 SAO 173446 SSTGLMA G238.1809-05.5428 TD1 9746
TYC 6541-4204-1 V* tau CMa WDS J07187-2457Aa,Ab WDS J07187-2457A Gaia DR3 5616537017987940736

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