coord 02 54 15.4610771 +52 45 44.923958 (ICRS, J2000, 2000.0), radius: 2 arcmin

Query : coord 02 54 15.4610771 +52 45 44.923958 (ICRS, J2000, 2000.0), radius: 2 arcmin
CLEAR
C.D.S. - SIMBAD4 rel 1.7 - 2020.10.20CEST01:47:50

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


Basic data :
* tau Per -- Eclipsing binary of Algol type
Distance to the center arcsec: 0.08
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:
Al* (), * (*,AG,...), ** (**,ADS,...), V* (CSV,NSV,...), IR (IRAS,IRC,...), UV (CEL,TD1), SB* (SBC7,SBC9)
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) :
02 54 15.4684102508 +52 45 44.885218477 (Optical) [ 0.2364 0.2548 90 ] A 2018yCat.1345....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) :
02 50 41.8758523622 +52 33 33.654443471 [ 0.2364 0.2548 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) :
141.0238581254003 -05.7406536447138 [ 0.2364 0.2548 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 :
-2.872 -2.739 [0.646 0.606 90] A 2018yCat.1345....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) 2.20 [0.7] / z(~) 0.000007 [0.000002] / cz 2.20 [0.70]
   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):
15.7163 [0.3150] A 2018yCat.1345....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:
G8III+A7V C 2008ApJS..176..216A
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 5.17 [~] C 2002yCat.2237....0D
B 4.71 [~] C 2002yCat.2237....0D
V 3.96 [~] C 2002yCat.2237....0D
R 3.33 [~] C 2002yCat.2237....0D
G 3.5790 [0.0071] C 2018yCat.1345....0G
I 2.89 [~] C 2002yCat.2237....0D
J 2.55 [~] C 2002yCat.2237....0D
H 2.309 [0.232] D 2003yCat.2246....0C
K 2.01 [~] C 2002yCat.2237....0D
SIMBAD with radius arcmin
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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!).

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (53) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

* tau Per FK5 103 JP11 712 TD1 1722
* 18 Per GC 3462 2MASS J02541545+5245448 TYC 3701-1394-1
* tau Per B GCRV 1615 N30 591 UBV 21533
* tau Per A GEN# +1.00017879 NSV 978 UBV M 9198
** LAB 1 GEN# +1.00017878 PLX 597 UBV M 9199
ADS 2202 A GSC 03701-01394 PMC 90-93 74 V* tau Per
AG+52 312 HD 17879 PPM 28080 WDS J02543+5246Aa,Ab
BD+52 641 HD 17878 RAFGL 4231S WDS J02543+5246A
CCDM J02543+5246A HIC 13531 ROT 388 WEB 2699
CEL 297 HIP 13531 SAO 23685 AAVSO 0247+52
CSI+52 641 3 HR 854 SBC7 104 Gaia DR2 441161693272720640
CSI+52 641 1 IDS 02472+5221 A SBC9 148
CSI+52 641 2 IRAS 02506+5233 SKY# 4357
CSV 100243 IRC +50077 SV* ZI 159

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References (156 between 1850 and 2020) (Total 156)
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


distance : 1    diameter : 1    velocities : 15    ROT : 1    PM : 6    Fe_H : 8    PLX : 3    MK : 10    V* : 1   

   

Observing logs


IUE : 36   

   


External archives :

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

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

Link by name to the catalogue in VizieR :

AG+52 312 BD+52 641 CCDM J02543+5246A CEL 297 FK5 103
GSC 03701-01394 HD 17879 HD 17878 HIC 13531 HIP 13531
HR 854 IRAS 02506+5233 IRC +50077 2MASS J02541545+5245448 NSV 978
PLX 597 PPM 28080 RAFGL 4231S SAO 23685 TD1 1722
TYC 3701-1394-1 V* tau Per WDS J02543+5246Aa,Ab WDS J02543+5246A Gaia DR2 441161693272720640

Search by coordinates in Vizier (radius: 5 arcsec)


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 .
Please, have a look at Best practices. The list of all annotations to SIMBAD objects can be found here .

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2020.10.20-01:47:50

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