M20

Query : M20

Basic data :
M 20 -- Open Cluster
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: 		Rad (CTB,GRS,...), OpC (2013A&A,OCISM,...), Cl* (C,Cl,...), * (CSI,[SC95]), Cl? (2013A&A), HII (LBN)
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) : 		18 02 42.0 -22 58 18 (Optical) [ ] E 2009MNRAS.399.2146W
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) : 		18 02 42.0 -22 58 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) : 		17 59 39.9 -22 58 23 [ ]
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) : 		007.0859 -00.2873 [ ]
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 : 		0.41 -1.69 [0.12 0.09 90] D 2019ApJ...870...32K
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) -2.10 [1.62] / z(~) -0.000007 [0.000005] / cz -2.10 [1.62]
   (Opt) B 2017AstBu..72..257L
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): 		0.79 [0.05] C 2019ApJ...870...32K
Syntax of angular size is : "maj-axis min-axis angle (wtype) quality bibcode"
  • maj-axis : major axis size (arc minutes)
  • min-axis : minor axis size (arc minutes)
  • angle : orientation angle (in degrees)
  • (wtype) : wavelength class for the origin of the angular size (Rad, mm, IR, Opt, UV, Xray, Gam)
  • quality : flag of quality of the angular size values ( A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the angular size reference
Angular size (arcmin): 		28.00 28.00 90 (~) D 2013A&A...560A..76M
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
Some important notes on this object about identifications and objects associations.
notes:

  • The cluster of stars C 1759-230 is at the center of the Trifid Nebula

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

: 277 		Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (21) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

M 20 LBN 006.99-00.17 NGC 6514 [KPS2012] MWSC 2789
C 1759-230 LBN 27 NRL 10 [SC95] M 208
Cl Collinder 360 LMH 12 OCISM 2 [SC95] M 215
CSI-23-17593 1 MM 11 OCl 23.0
CTB 45 MSH 17-2-16 [DGW65] 99
GRS G007.00 -00.30 NAME Trifid Nebula [KPR2004b] 425

References (49 between 2019 and 2024) (Total 434)
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


velocities : 2    distance : 5    PLX : 1    PM : 3   

   

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 (2) 

 |typ|    Value    R   m.e.  |A (Nmes)|na,Q,dom ,   res    D| Obs.date | Rem.  |Or|     Reference     |
 ------------------------------------------------------------------------------------------------------
 |v  |   -2.10        1.62   |B (    )|s , ,Opt ,           |          |       |  |2017AstBu..72..257L|

distance (5) 

 | distance Q unit|  err-        err+     | method |     reference     |
 -----------------------------------------------------------------------
 |  821       pc  |                       |        |2017AstBu..72..257L|

plx (1) 

 |    plx    :    m.e     R |     reference     |
 ------------------------------------------------
 |   0.79    :   0.05       |2019ApJ...870...32K|

pm (3) 

 |  pm-ra  [   m.e   ]|  pm-de  [   m.e   ]|syst|     reference     |
 --------------------------------------------------------------------
 |   +3.100[    0.570]|   -0.210[    0.570]|ICRS|2017AstBu..72..257L|
Observing logs


ISO : 22    IUE : 9   

   

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)

iso (22)

The 2 columns in color are computed by VizieR, and are not part of the original data.
Note: Quick-look images of the data, and specific documentation, are accessible by clicking on the TDT observation identifier
VI/111/isolog
Post annotation 		ISO Observation Log (ISO Data Centre, 2004) [ReadMe+ftp]

*The ISO Observation Log[image] (36737 rows) (Note)		img(gal)
start AladinLite 
 Full      _r        TDT    AOT    minLam  maxLam  Target                                 oStart         oLen    recno   FOV                  RAJ2000   DEJ2000 cal  ObsID    abs  PropID  
        arcmin                      um      um                                             s             s                                     deg       deg                              


    1     2.945  49301713  CAM04    5.01   16.77  M20-TRIF6                       1997-03-23T15:49:05   1602     21232  96"x96"             270.6295  -22.9976      JCERNICH +    TRIFID  
    2     4.016  49301812  CAM04    5.01   16.77  M20-TRIF5                       1997-03-23T16:16:37   1602     21233  96"x96"             270.6295  -23.0242      JCERNICH +    TRIFID  
    3     5.164  47700914  LWS01   43.05  195.91  M20-TRIFID                      1997-03-07T19:33:22   1022     20636  84" D               270.6005  -23.0240      JCERNICH +    COM_GLO 
    4     5.168  33101415  PHT03   54.23   70.56  M20      1                      1996-10-13T01:37:49   2224     14015  520"x520"           270.6004  -23.0240      JCERNICH +    COM_GLO 
    5     5.168  33101510  PHT22  187.07  216.69  M20      1                      1996-10-13T02:15:49    368     14016  541"x541"           270.6004  -23.0240      JCERNICH +    COM_GLO 
    6     5.172  33101303  CAM01    8.55   15.45  M20      1                      1996-10-13T01:03:53   1978     14014  852"x822"           270.6004  -23.0241      JCERNICH +    COM_GLO 
    7     5.180  46701204  LWS01   43.05  195.92  M20-TRIFID                      1997-02-25T19:55:35   3468     20243  444"x84" (sparse)   270.6003  -23.0242      JCERNICH +    MAS_AGUA
    8     5.180  47700405  CAM04    5.01   16.77  M20-TRIFID                      1997-03-07T10:28:32   1602     20628  96"x96"             270.6003  -23.0242      JCERNICH +    TRIFID  
    9     5.180  48701601  CAM01    8.55   15.45  M20-TRIF-P                      1997-03-17T16:48:06   6296     21024  912"x912"           270.6003  -23.0242      JCERNICH +    TRIFID  
   10     5.180  48701717  PHT22   98.40  119.40  M20                             1997-03-17T18:34:02   2208     21025  918"x831"           270.6003  -23.0242      JCERNICH +    COM_GLO 
   11     5.180  48701812  CAM01    5.05   17.05  M20-TRIFID                      1997-03-17T19:11:52   4146     21026  852"x822"           270.6003  -23.0242      JCERNICH +    COM_GLO 
   12     5.180  48701919  CAM01    8.34   12.45  M20-TRIFID                      1997-03-17T20:21:56   3952     21027  852"x822"           270.6003  -23.0242      JCERNICH +    COM_GLO 
   13     5.515  87801101  CAM04   -1.00   -1.00  TRIFIDA                         1998-04-11T10:26:04   2088     36387  ------N/A------     270.5978  -23.0303      JCERNICH +    WARMDUST
   14     5.940  47700404  CAM04    5.01   16.77  M20-TRIF2                       1997-03-07T09:58:18   1764     20627  96"x96"             270.5711  -22.9975      JCERNICH +    TRIFID  
   15     6.279  48701511  CAM04    5.01   16.77  M20-TRIF4                       1997-03-17T16:20:28   1602     21023  96"x96"             270.6003  -23.0509      JCERNICH +    TRIFID  
   16     6.335  47700402  CAM04    5.01   16.77  M20-JET                         1997-03-07T09:14:32   2572     20626  48"x48"             270.6195  -23.0644      JCERNICH +    TRIFID  
   17     6.538  47700406  CAM04    5.01   16.77  M20-TRIF3                       1997-03-07T10:56:04   1764     20629  96"x96"             270.5711  -23.0242      JCERNICH +    TRIFID  
   18     7.248  49302208  CAM01    8.13   15.45  M20-JET-40-40                   1997-03-23T18:07:27   1748     21237  168"x168"           270.6075  -23.0756      JCERNICH +    TRIFID  
   19     7.248  49302407  CAM01    7.92   12.76  M20-JET-40-40                   1997-03-23T19:46:13   2000     21239  168"x168"           270.6075  -23.0756      JCERNICH +    TRIFID  
   20     7.329  48702018  CAM04    5.01   16.77  M20-JET-GLO1                    1997-03-17T21:28:44   1926     21028  96"x96"             270.6061  -23.0764      JCERNICH +    COM_GLO 
   21     9.967  47700610  LWS01   43.05  195.91  TRIFID-GLO2                     1997-03-07T11:59:06   1762     20631  84" D               270.5570  -23.0977      JCERNICH +    SPEC_LWS
   22    10.007  33102704  PHT22  187.07  216.69  M20      2                      1996-10-13T06:18:07    368     14032  541"x541"           270.6004  -23.1240      JCERNICH +    COM_GLO

iue (9) 

 |Homogenized Name:  ComplID   |PROG |CL|D CAM IMAGE A| FES  MD|Obs.da  Time |ExpTim|m|CEB|S|      Comments      |F|     reference     |
 ---------------------------------------------------------------------------------------------------------------------------------------
 |NGC 6514        :4           |NHJRD|72|L SWP 33303 L|      BO|880417 094900|025200| |309|G|C=175,B=110         |*|1996IUEML.C......0I|

External archives :

Data at NED - NASA/IPAC Extragalactic Database : M20

Link by name to the catalogue in VizieR :

NGC 6514

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 .

display existing annotations (1)

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