20 Tau

Query : 20 Tau C.D.S. - SIMBAD4 rel 1.225 - 2015.08.01CEST15:57:44

Available data : Basic data  •  Identifiers  •  Plot & images  •  Bibliography  •  Measurements  •  External archives  •  Notes  •  Annotations


Basic data :
* 20 Tau -- Star
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,ALS,BD,GC,GCRV​,GEN#,GSC,HD,HGAM​,HIC,HIP,HR,JP11​,PPM,Renson,ROT,SAO​,SKY#,TYC,UBV,uvby98,[B10]), IR (IRAS,2MASS,[KSP2003]), *iC (Cl*,Cl), V* (CSV,NSV), UV (CEL,TD1), *iN (VDB), X (1E), ** (WDS)
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra : right ascension (unit and frame defined according to your Output Options)
  • dec : declination (unit and frame defined according to your Output Options)
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : coordinates error major axis, minor axis (in mas at epoch defined in your output options),
    position angle (in degrees North to East of the specified coordinate frame)
  • 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) :
03 45 49.60656 +24 22 03.8864 ( Optical ) [ 2.72 2.46 90 ] A 2007A&A...474..653V
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra : right ascension (unit and frame defined according to your Output Options)
  • dec : declination (unit and frame defined according to your Output Options)
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : coordinates error major axis, minor axis (in mas at epoch defined in your output options),
    position angle (in degrees North to East of the specified coordinate frame)
  • 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) :
03 45 49.607 +24 22 03.89 [ 2.72 2.46 90 ]
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra : right ascension (unit and frame defined according to your Output Options)
  • dec : declination (unit and frame defined according to your Output Options)
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : coordinates error major axis, minor axis (in mas at epoch defined in your output options),
    position angle (in degrees North to East of the specified coordinate frame)
  • 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) :
03 42 50.76 +24 12 47.0 [ 15.69 14.26 0 ]
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra : right ascension (unit and frame defined according to your Output Options)
  • dec : declination (unit and frame defined according to your Output Options)
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : coordinates error major axis, minor axis (in mas at epoch defined in your output options),
    position angle (in degrees North to East of the specified coordinate frame)
  • 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) :
166.1707 -23.5145 [ 2.72 2.46 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 :
20.95 -45.98 [0.31 0.28 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) 7.40 [0.5] / z(~) 0.000025 [0.000002] / cz 7.40 [0.50]   (~) A 2006AstL...32..759G
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:
8.51 [0.28] A 2007A&A...474..653V
Spectral type is made of 3 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
  • bibcode : bibcode of the spectral type reference
Spectral type:
B8III C ~
Syntax of fluxes (or magnitudes) is : "filter-name flux-value [error] quality MultVarFlags bibcode"
  • filter-name : U, B, V, R, I, J, H, K, u, g, r, i, z
  • 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 (8) :
U 3.40 [~] C 2002yCat.2237....0D
B 3.80 [~] C 2002yCat.2237....0D
V 3.87 [~] C 2002yCat.2237....0D
R 3.85 [~] C 2002yCat.2237....0D
I 3.90 [~] C 2002yCat.2237....0D
J 3.93 [~] C 2002yCat.2237....0D
H 4.122 [0.036] C 2003yCat.2246....0C
K 3.986 [0.017] C 2003yCat.2246....0C
SIMBAD with radius arcmin
Interactive AladinLite view
Back
sedIcon
VizieR photometry viewer    sed-help-icon
within radius 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.
essential notes:
  • also RfN VDB 21


The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (46) :

NAME MAIA Cl Melotte 22 785 HR 1149 TYC 1799-1439-1
* 20 Tau Cl Melotte 22 7851 IRAS 03428+2412 UBV 3582
AG+24 335 CSV 100311 JP11 4627 UBV M 41028
ALS 15827 1E 0343.3+2347 2MASS J03454960+2422037 uvby98 520220785
BD+23 516 GC 4500 NSV 1279 VDB 21
CEL 324 GCRV 2097 PPM 92841 WDS J03458+2422A
Cl* Melotte 22 K 23 GEN# +5.20220785 Renson 6000 [B10] 860
Cl* Melotte 22 MSH 116 GSC 01799-01439 ROT 3756 [KSP2003] G166.1705-23.5140
Cl* Melotte 22 MSK 67 HD 23408 SAO 76155 [KSP2003] J034549.66+242205.2
Cl* Melotte 22 TRU 231 HGAM 262 SKY# 5719 [SCG94] O 99
Cl* Melotte 22 WCZ 110 HIC 17573 SV* ZI 218
Cl* Melotte 22 HII 785 HIP 17573 TD1 2489

Plots and Images

plot

radius arcmin


CDS portal

CDS Simplay
(requires flash)

Aladin applet

References (361 between 1850 and 2015)
Simbad bibliographic survey began in 1950 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

from: to:

                                  Sort reference summaries by : (not exhaustive, explanation here)

                                 


Measurements (20 types) :


CEL : 1    Fe_H : 2    GEN : 1    Hbet1 : 6    IRAS : 1    IUE : 52    JP11 : 3    MK : 16    oRV : 13    PLX : 2    PM : 1    pos : 1   
posa : 1    ROT : 5    SAO : 1    TD1 : 1    UBV : 8    uvby1 : 6    V* : 1    velocities : 14   

   


External archives :

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

Data at NED - NASA/IPAC Extragalactic Database

Catalogue information from VizieR :

Generic search by coordinates (radius: 5 arcsec)

AG+24 335 ALS 15827 BD+23 516 GSC 01799-01439 HD 23408
HIC 17573 HIP 17573 HR 1149 IRAS 03428+2412 2MASS J03454960+2422037
NSV 1279 PPM 92841 SAO 76155 TYC 1799-1439-1 VDB 21
WDS J03458+2422A

Annotations :
Annotations allow a user to add a note or report an error concerning the astronomical object and its data. It requires registration to post a note. See description .
The list of all annotations to SIMBAD objects can be found here .

Currently no annotations available

add an annotation to this object

report an error concerning the data of this object


Store this result in the CDS portal

To bookmark this query, right click on this link: simbad:20 Tau and select 'bookmark this link' or equivalent in the popup menu


2015.08.01-15:57:44

© UDS/CNRS

Contact