Ass Cyg OB 2

Query : Ass Cyg OB 2

Basic data :
Ass Cyg OB 2 -- Association of Stars
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: 		Cl* ([KPR2004b],[KPS2012],...), As* (2013A&A,Ass), X (1E)
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) : 		20 33 12.0 +41 19 00 [ ] E 2005A&A...438.1163K
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
FK5 coord. (ep=J2000 eq=2000) : 		20 33 12.0 +41 19 00 [ ]
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) : 		20 31 24.3 +41 08 42 [ ]
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) : 		080.2204 +00.7966 [ ]
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 : 		-1.60 -4.72 [0.26 0.24 90] D 2005A&A...438.1163K
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) -28.00 [~] / z(~) -0.000093 [~] / cz -28.00 [~]
   D 2005A&A...438.1163K
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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sedIcon
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 ) :

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

: 3337 		Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (7) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

NAME VI Cyg 1E 2031.0+4050 [KPR2004b] 490 [MWC53] VI Cyg
Ass Cyg OB 2 NAME VI Cygni [KPS2012] MWSC 3364

References (210 between 2019 and 2024) (Total 943)
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 :

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                 or select by : (not exhaustive, explanation here)

Collections of Measurements


velocities : 1    distance : 4   

   

Warning : measurements from IRAS, IRC, SAO, CL.g (ACO), GJ have been removed
(they are still available using the icon Vizier near the identifier of the catalogue, or at the bottom of the page in the section "External links" to get the full data)

velocities (1) 

 |typ|    Value    R   m.e.  |A (Nmes)|na,Q,dom ,   res    D| Obs.date | Rem.  |Or|     Reference     |
 ------------------------------------------------------------------------------------------------------
 |v  |  -28.0        18      |E (    )|s , ,Opt ,           |          |       |  |2017A&A...600A.106C|

distance (4) 

 | distance Q unit|  err-        err+     | method |     reference     |
 -----------------------------------------------------------------------
 | 1669       pc  |  -6          +6       |paral   |2021MNRAS.502.6080O|
Observing logs


herschel : 4    XMM : 4   

   

Warning : measurements from IRAS, IRC, SAO, CL.g (ACO), GJ have been removed
(they are still available using the icon Vizier near the identifier of the catalogue, or at the bottom of the page in the section "External links" to get the full data)

herschel (4)

The 1 column in color are computed by VizieR, and are not part of the original data.

Note: (see also the postcard server)

VI/139/herschel
Post annotation 		Herschel Observation Log (Herschel Science Centre, 2013) [ReadMe+ftp]
2013yCat.6139....0H

The Herschel Observation Log (37093 rows)		img(gal)
start AladinLite 
 Full      _r     OD   Target                                 RAJ2000      DEJ2000    Proposal           AOT                 Dur          Start            ObsId       PACS        HIFI        SPIRE    Label                                                                                                                 
        arcmin                                               "h:m:s"      "d:m:s"                                            s             s                                                                                                                                                                                 


    1   1.2305  1120  NAME VI CYG 7                        20 33 14.11  +41 20 21.9  OT2_mrubio_2       PacsPhoto           2805  2012-06-07T13:52:16  1342246717  get Herschel/PACS observation #1342246717                           PPhoto-0003                                                                                                           
    2   1.2305  1120  NAME VI CYG 7                        20 33 14.11  +41 20 21.9  OT2_mrubio_2       PacsPhoto           2805  2012-06-07T13:04:28  1342246716  get Herschel/PACS observation #1342246716                           PPhoto-0002                                                                                                           
    3   1.2305  1120  NAME VI CYG 7                        20 33 14.11  +41 20 21.9  OT2_mrubio_2       PacsPhoto            671  2012-06-07T12:52:14  1342246715  get Herschel/PACS observation #1342246715                           PPhoto-0001                                                                                                           
    4   1.2305  1120  NAME VI CYG 7                        20 33 14.11  +41 20 21.9  OT2_mrubio_2       PacsPhoto            671  2012-06-07T12:40:00  1342246714  get Herschel/PACS observation #1342246714                           PPhoto-0000

xmm (4)

The 3 columns in color are computed by VizieR, and are not part of the original data.
B/xmm/xmmlog
Post annotation 		XMM-Newton Observation Log (XMM-Newton Science Operation Center, 2012) [ReadMe+ftp]
2002yCat....102009X

The XMM-Newton Observation log (2024-03-25)[image/fits] (17645 rows)		img(gal)
start AladinLite 
 Full      _r        Obsno     PropDate   Object                           RAJ2000    DEJ2000           Obs0          ObsDur Image  PPSp   FITS XSAlink
        arcmin                    s                                         deg        deg              s              s                             


    1    0.6809  0200450201  2005-12-16  CYG OB2 8                       308.31285  +41.31403  2004-10-29T23:16:45    19909 FITS       PPSp  0200450201 Y
    2    0.6809  0200450301  2005-12-16  CYG OB2 8                       308.31285  +41.31403  2004-11-08T22:29:12    21914 FITS       PPSp  0200450301 Y
    3    0.6809  0200450401  2005-12-16  CYG OB2 8                       308.31285  +41.31403  2004-11-18T21:51:15    23915 FITS       PPSp  0200450401 Y
    4    0.6809  0200450501  2005-12-16  CYG OB2 8                       308.31285  +41.31403  2004-11-28T21:13:34    21918 FITS       PPSp  0200450501 Y

External archives :

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

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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