NGC 6888

Query : NGC 6888

Basic data :
NGC 6888 -- Interstellar Medium Object
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: 		HII (LBN), ISM ([T70])
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 12 07.0 +38 21 18 [ ] E ~
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 12 07.0 +38 21 18 [ ]
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 10 17.5 +38 12 15 [ ]
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) : 		075.4765 +02.4250 [ ]
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: 		WN6b(h) C 2014MNRAS.440.1345F
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 (1) :
B 7.44 [~] E ~
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:

  • : WR + Ring neb

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (5) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

LBN 203 NAME Crescent Nebula [T70] 32
LBN 075.51+02.29 NGC 6888

References (15 between 2019 and 2024) (Total 271)
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)

Observing logs


herschel : 10    IUE : 6   

   

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 (10)

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   1.6330   582  NGC6888_alt-1                        20 12 12.00  +38 20 00.0  KPGT_mgroen01_1    PacsPhoto           3074  2010-12-16T15:29:29  1342212043  get Herschel/PACS observation #1342212043                           PPhot_NGC 6888_B_Scan-135_M_alt                                                                                       
    2   1.6330   582  NGC6888_alt-1                        20 12 12.00  +38 20 00.0  KPGT_mgroen01_1    PacsPhoto           3074  2010-12-16T14:37:12  1342212042  get Herschel/PACS observation #1342212042                           PPhot_NGC 6888_B_Scan-45_M_alt                                                                                        
    3   1.6330   582  NGC6888_alt-1                        20 12 12.00  +38 20 00.0  KPGT_mgroen01_1    PacsPhoto           3074  2010-12-16T13:44:55  1342212041  get Herschel/PACS observation #1342212041                           PPhot_NGC 6888_G_Scan-135_M_alt                                                                                       
    4   1.6330   582  NGC6888_alt-1                        20 12 12.00  +38 20 00.0  KPGT_mgroen01_1    PacsPhoto           3074  2010-12-16T12:52:38  1342212040  get Herschel/PACS observation #1342212040                           PPhot_NGC 6888_G_Scan-45_M_alt                                                                                        
    5   2.1760  1306  NGC 6888 -inner-1                    20 11 56.02  +38 21 40.1  OT2_dstock_3       PacsLineSpec        2323  2012-12-09T16:19:47  1342256928  get Herschel/PACS observation #1342256928                           NGC 6888 (P2) inner                                                                                                   
    6   2.1760  1306  NGC 6888 -inner-1                    20 11 56.02  +38 21 40.1  OT2_dstock_3       PacsLineSpec        1574  2012-12-09T15:51:17  1342256927  get Herschel/PACS observation #1342256927                           NGC 6888 P(1+3) inner                                                                                                 
    7   8.4272  1303  NGC 6888 -outer-1                    20 12 39.02  +38 26 55.1  OT2_dstock_3       PacsLineSpec        1570  2012-12-06T14:17:46  1342256478  get Herschel/PACS observation #1342256478                           NGC 6888 (1+3)  outer                                                                                                 
    8   8.4272  1303  NGC 6888 -outer-1                    20 12 39.02  +38 26 55.1  OT2_dstock_3       PacsLineSpec        2319  2012-12-06T13:36:57  1342256477  get Herschel/PACS observation #1342256477                           NGC 6888 (P2) outer                                                                                                   
    9  35.7256   328  NGC6888-StripExt                     20 10 00.00  +38 47 00.0  KPGT_mgroen01_1    PacsPhoto          12791  2010-04-07T04:12:26  1342194050  get Herschel/PACS observation #1342194050                           PPhot_NGC 6888_B_Scan-135_M_Strip                                                                                     
   10  35.7256   328  NGC6888-StripExt                     20 10 00.00  +38 47 00.0  KPGT_mgroen01_1    PacsPhoto          10717  2010-04-07T01:12:08  1342194049  get Herschel/PACS observation #1342194049                           PPhot_NGC 6888_B_Scan-45_M_Strip

iue (6) 

 |Homogenized Name:  ComplID   |PROG |CL|D CAM IMAGE A| FES  MD|Obs.da  Time |ExpTim|m|CEB|S|      Comments      |F|     reference     |
 ---------------------------------------------------------------------------------------------------------------------------------------
 |NGC 6888        :2           |NEJRD|76|L SWP 32347 L|      BO|871117 043300|002400| |03 |G|B=43                |*|1996IUEML.C......0I|

External archives :

Data at NED - NASA/IPAC Extragalactic Database : NGC 6888

Link by name to the catalogue in VizieR :

NGC 6888

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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