HD 190918

Query : HD 190918

Basic data :
HD 190918 -- Wolf-Rayet
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: 		* (HD,AG,...), ** (**,ADS,...), WR* (2003AstL,MR,...), SB* (2022A&A,SBC7,...), Em* (HBHA,Hen,...), V* (CSV,NSV,...), MIR (AKARI,WISEA,...), UV (CEL,TD1), X (1RXS), NIR (2MASS)
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 05 57.3244526328 +35 47 18.150756792 (Optical) [ 0.0167 0.0196 90 ] A 2020yCat.1350....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) : 		20 04 04.6221314726 +35 38 38.533760586 [ 0.0167 0.0196 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) : 		072.6516192168142 +02.0651049181257 [ 0.0167 0.0196 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 : 		-3.175 -6.537 [0.022 0.025 90] A 2020yCat.1350....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) 0.00 [5] / z(spectroscopic) 0.000000 [0.000017] / cz 0.00 [5.00]
   (Opt) C 1932LicOB..16...53H
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): 		0.538 [0.0223] A 2020yCat.1350....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: 		WN5+O9I C 2006A&A...457.1015H
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 (7) :
U 6.11 [~] C 2002yCat.2237....0D
B 6.88 [~] C 2002yCat.2237....0D
V 6.75 [~] C 2002yCat.2237....0D
G 6.746422 [0.002797] C 2020yCat.1350....0G
J 6.319 [0.020] C 2003yCat.2246....0C
H 6.315 [0.018] C 2003yCat.2246....0C
K 6.247 [0.021] C 2003yCat.2246....0C
SIMBAD within arcmin
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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

Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 2 : 770 Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (57) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

HD 190918 GCRV 12465 NGC 6871 1 V* V1676 Cyg
** BU 440A GEN# +2.68710001 NSV 12795 WDS J20060+3547A
** SHJ 314A GOS G072.65+02.07 01 PLX 4771 WEB 17592
** HAU 26A GSC 02682-01564 PPM 84191 WISEA J200557.29+354718.3
** DOO 78A HBHA 3703-71 ROT 7641 WISE J200557.32+354718.4
ADS 13374 A Hen 3-1828 1RXS J200557.3+354708 WR 133
AG+35 1945 HGAM 830 SAO 69402 [KW97] 42-35
AKARI-IRC-V1 J2005573+354718 HIC 99002 SBC7 782 [MJD95] J200557.35+354718.0
ALS 10821 HIP 99002 SBC9 1201 [S78b] 316A
BD+35 3953 JP11 4437 SKY# 37769 Gaia DR2 2059076148587289728
CCDM J20060+3547A LF 3a +35 153 TD1 26051 Gaia DR3 2059076148587289728
CEL 4929 LS II +35 33 TIC 89757859 Gaia DR1 2059076144260834560
CSI+35 3953 1 2MASS J20055731+3547181 TYC 2682-1564-1
CSV 102981 MCW 787 UBV 17265
GC 27892 MR 99 UCAC3 252-203485

References (369 between 1850 and 2024) (Total 369)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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                Reference summaries :

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Collections of Measurements


velocities : 163    V* : 2    distance : 2    ROT : 1    PLX : 3    PM : 6    MK : 17   

   

Observing logs


ISO : 1    IUE : 8   

   

External archives :

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

Link by name to the catalogue in VizieR :

HD 190918 AG+35 1945 AKARI-IRC-V1 J2005573+354718 ALS 10821 BD+35 3953
CCDM J20060+3547A CEL 4929 GSC 02682-01564 HIC 99002 HIP 99002
LF 3a +35 153 LS II +35 33 2MASS J20055731+3547181 NSV 12795 PLX 4771
PPM 84191 1RXS J200557.3+354708 SAO 69402 TD1 26051 TYC 2682-1564-1
UCAC3 252-203485 V* V1676 Cyg WDS J20060+3547A WISEA J200557.29+354718.3 WISE J200557.32+354718.4
Gaia DR2 2059076148587289728 Gaia DR3 2059076148587289728 Gaia DR1 2059076144260834560

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