12 Comae Berenices

C.D.S. - SIMBAD4 rel 1.7 - 2019.10.21CEST01:08:31

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


Basic data :
* 12 Com -- Spectroscopic binary
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:
* (Ref,*,...), ** (**,ADS,...), X (RBS,RX,...), SB* (SBC7,SBC9), *iC (Cl*,Cl), V* (NSV), IR (2MASS), UV (TD1)
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 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) :
12 22 30.3107569400 +25 50 46.189595360 (Optical) [ 0.1980 0.1573 90 ] A 2018yCat.1345....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] : coordinates error major axis, minor axis (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) :
12 19 59.6084508934 +26 07 24.447548571 [ 0.1980 0.1573 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 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) :
222.5041660298207 +83.4013948720523 [ 0.1980 0.1573 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 :
-10.847 -9.546 [0.396 0.351 90] A 2018yCat.1345....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) 0.5 [0.9] / z(~) 0.000002 [0.000003] / cz 0.50 [0.90]
   A 1979IAUS...30...57E
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):
11.8280 [0.2353] A 2018yCat.1345....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:
F6III+A3V C 2008ApJS..176..216A
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 (9) :
U 5.56 [~] C 2002yCat.2237....0D
B 5.30 [~] C 2002yCat.2237....0D
V 4.81 [~] C 2002yCat.2237....0D
R 4.34 [~] C 2002yCat.2237....0D
I 4.01 [~] C 2002yCat.2237....0D
G 4.5866 [0.0041] C 2018yCat.1345....0G
J 4.28 [~] C 2002yCat.2237....0D
H 3.401 [0.216] D 2003yCat.2246....0C
K 4.34 [~] C 2002yCat.2237....0D
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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!).

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

: 1 : 320 Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (54) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

* 12 Com GC 16873 PMC 90-93 914 UBV M 18127
** SHJ 143A GCRV 7428 PPM 101845 UBV M 41675
ADS 8530 A GEN# +5.21110091 RBS 1103 UBV 11112
AG+26 1263 HD 107700 ROT 3924 uvby98 521110091 A
BD+26 2337 HIC 60351 RX J1222.5+2550 WDS J12225+2551A
CCDM J12225+2551A HIP 60351 RX J1222.5+2549 WEB 10733
Cl* Melotte 111 MMU 91 HR 4707 1RXS J122230.9+255033 YZ 26 6089
Cl* Melotte 111 AV 1284 IDS 12175+2624 A SAO 82273 [AKS95] 98
Cl* Melotte 111 BOU 27 JP11 5025 SBC7 460 [HFE83] 871
Cl Melotte 111 91 2MASS J12223029+2550461 SBC9 719 [SS59] I 268
CSI+26 2337 1 N30 2859 SKY# 23182 [ZEH2003] RX J1222.5+2550 1
CSI+26-12200 NSV 5581 SRS 31318 Gaia DR2 4008342726516877312
FK5 1318 PLX 2850 TD1 16230
GAT 1270 PLX 2850.00 TYC 1989-3210-1

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References (172 between 1850 and 2019) (Total 172)
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


distance : 1    velocities : 35    ROT : 5    PM : 6    Fe_H : 12    PLX : 5    MK : 8    V* : 1   

   

Observing logs


ISO : 4    IUE : 2   

   


External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : 12 Comae Berenices

Link by name to the catalogue in VizieR :

AG+26 1263 BD+26 2337 CCDM J12225+2551A FK5 1318 HD 107700
HIC 60351 HIP 60351 HR 4707 2MASS J12223029+2550461 NSV 5581
PLX 2850 PPM 101845 1RXS J122230.9+255033 SAO 82273 TD1 16230
TYC 1989-3210-1 uvby98 521110091 A WDS J12225+2551A Gaia DR2 4008342726516877312

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

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2019.10.21-01:08:31

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