31 Com

Query : 31 Com C.D.S. - SIMBAD4 rel 1.5.8 - 2016.09.27CEST02:05:48

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


Basic data :
* 31 Com -- Rotationally variable Star
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:
* (*,AG,...), X (1AXG,2E,...), UV (2EUVE,EUVE,...), V* (V*,NSV), IR (IRAS,2MASS), *iC (Cl*), Ro* (Ref)
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] : coordinates error major axis, minor axis (in mas at epoch defined in your output options),
    position angle (in degrees North to East of the specified coordinate frame)
  • 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) :
12 51 41.92207 +27 32 26.5754 (Optical) [ 2.46 1.50 90 ] A 2007A&A...474..653V
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] : coordinates error major axis, minor axis (in mas at epoch defined in your output options),
    position angle (in degrees North to East of the specified coordinate frame)
  • 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) :
12 51 41.922 +27 32 26.58 [ 2.46 1.50 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] : coordinates error major axis, minor axis (in mas at epoch defined in your output options),
    position angle (in degrees North to East of the specified coordinate frame)
  • 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) :
12 49 15.85 +27 48 44.8 [ 14.08 8.85 86 ]
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] : coordinates error major axis, minor axis (in mas at epoch defined in your output options),
    position angle (in degrees North to East of the specified coordinate frame)
  • 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) :
114.9540 +89.5835 [ 2.46 1.50 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 :
-8.77 -7.72 [0.28 0.17 0] A 2007A&A...474..653V
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) -0.08 [0.6] / z(~) -0.000000 [0.000002] / cz -0.08 [0.60]
   A 2008AJ....135..209M
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):
11.22 [0.23] A 2007A&A...474..653V
Spectral type is made of 3 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
  • bibcode : bibcode of the spectral type reference
Spectral type:
G0IIIp C ~
Syntax of fluxes (or magnitudes) is : "filter-name flux-value [error] quality MultVarFlags bibcode"
  • filter-name : U, B, V, R, I, J, H, K, u, g, r, i, z
  • 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 (13) :
U 5.81 [~] C 2002yCat.2237....0D
B 5.61 [~] C 2002yCat.2237....0D
V 4.94 [~] C 2002yCat.2237....0D
R 4.39 [~] C 2002yCat.2237....0D
I 4.04 [~] C 2002yCat.2237....0D
J 3.72 [~] C 2002yCat.2237....0D
H 3.42 [~] C 2002yCat.2237....0D
K 3.35 [~] C 2002yCat.2237....0D
u (AB) 10.338 [0.007] C 2009yCat.2294....0A
g (AB) 9.786 [0.007] C 2009yCat.2294....0A
r (AB) 9.784 [0.007] C 2009yCat.2294....0A
i (AB) 10.367 [0.011] D 2009yCat.2294....0A
z (AB) 9.661 [0.011] D 2009yCat.2294....0A
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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!).
Some important notes on this object about identifications and objects associations.
notes:

  • FK Com variable star (see the GCVS).


The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (57) :

V* LS Com GCRV 7697 PPM 102212 TYC 1995-2586-1
* 31 Com GEN# +1.00111812 RBS 1170 UBV 11570
AG+27 1261 GSC 01995-02586 2RE J1251+273 UBV M 18750
1AXG J125141+2732 HD 111812 2RE J125141+273233 uvby98 100111812
BD+28 2156 HIC 62763 RE J125139+273247 2XMM J125141.9+273226
Cl* Melotte 111 MGM 399 HIP 62763 RE J1251+273 3XMM J125141.9+273226
Cl* Melotte 111 BOU 47 HR 4883 ROT 1898 YZ 27 6272
2E 2874 IRAS 12492+2748 RX J1251.7+2732 [ATZ98] D350
2E 1249.2+2748 JP11 2310 RX J1251.6+2732 [BOA98] 16
1ES 1249+27.8 2MASS J12514192+2732266 1RXS J125142.1+273222 [HFE83] 907
2EUVE J1251+27.5 N30 2963 SAO 82537 [M60b]+28 448
EUVE J1251+27.5 NSV 19505 SDSS J125141.84+273226.6 [ZEH2003] RX J1251.7+2732 1
FAUST 3528 PLX 2955 SKY# 23925
FK5 1332 PLX 2955.00 SRS 31332
GC 17455 PMC 90-93 927 TD1 16518

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References (392 between 1850 and 2016)
Simbad bibliographic survey began in 1950 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Measurements (19 types) :


Einstein : 1    Fe_H : 1    GEN : 1    Hbet1 : 8    IRAS : 1    IUE : 31    JP11 : 2    MK : 20    oRV : 5    PLX : 5    PM : 4    pos : 4   
posa : 1    ROT : 3    SAO : 1    UBV : 10    uvby1 : 13    velocities : 7    XMM : 1   

   


External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : 31 Com

Link by name to the catalogue in VizieR :

V* LS Com AG+27 1261 BD+28 2156 EUVE J1251+27.5 FAUST 3528
FK5 1332 GSC 01995-02586 HD 111812 HIC 62763 HIP 62763
HR 4883 IRAS 12492+2748 2MASS J12514192+2732266 NSV 19505 PPM 102212
2RE J1251+273 2RE J125141+273233 1RXS J125142.1+273222 SAO 82537 SDSS J125141.84+273226.6
TYC 1995-2586-1 uvby98 100111812

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Annotations :
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The list of all annotations to SIMBAD objects can be found here .

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2016.09.27-02:05:48

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