* alf Com

Query : * alf Com

Basic data :
* alf Com -- Double or multiple 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,...), ** (CCDM,**,...), PM* (2016ApJ,Ci,...), IR (AKARI,IRAS,...), X (RBS,RE,...), V* (CSV,NSV,...), UV (2EUVE,EUVE,...)
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) :
13 09 59.28520 +17 31 46.0389 (Optical) [ 6.17 4.51 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] : 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) :
13 07 33.32666 +17 47 36.3016 [ 6.17 4.51 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) :
327.93345531 +79.48938368 [ 6.17 4.51 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 :
-433.13 141.24 [0.70 0.51 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) -18.826 [0.0016] / z(spectroscopic) -0.000063 [0.000000] / cz -18.83 [0.00]
   (Opt) A 2018A&A...616A...7S
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):
56.10 [0.89] A 2007A&A...474..653V
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:
F5V+F6V C 2013MNRAS.428.3104E
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 (11) :
U 4.71 [~] C 2014JAVSO..42..443M
B 4.77 [~] C 2014JAVSO..42..443M
V 4.32 [~] C 2014JAVSO..42..443M
R 4.1 [~] E 2003AJ....125..984M
G 4.656462 [0.014337] C 2020yCat.1350....0G
J 3.40 [0.24] D 2003yCat.2246....0C
H 3.27 [0.22] D 2003yCat.2246....0C
K 3.11 [0.25] D 2003yCat.2246....0C
u 5.52 [~] C 2014JAVSO..42..443M
g 4.47 [~] C 2014JAVSO..42..443M
r 4.23 [~] C 2014JAVSO..42..443M
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!).
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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

: 2
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

CCDM J13100+1732AB GC 17833 NLTT 33105 TIC 138128530
* 42 Com GCRV 7832 NSV 6116 UBV 11895
* alf Com GCRV 63887 PLX 3006 USNO-B1.0 1075-00257793
** STF 1728AB GEN# +1.00114378 PLX 3006.00 uvby98 100114378
ADS 8804 AB GJ 501.0 PPM 129630 WDS J13100+1732AB
AG+17 1350 HIC 64241 RBS 1225 WEB 11357
AKARI-IRC-V1 J1309590+173147 HIP 64241 RE J130959+173150 WISEA J130958.98+173147.5
ASCC 868407 IDS 13051+1803 AB ROT 1938 WISE J130958.97+173146.5
BD+18 2697 IRAS 13075+1747 RX J1309.9+1731 YZ 17 4848
Ci 20 762 IRAS F13075+1747 RX J1310.0+1731 [ZEH2003] RX J1309.9+1731 1
CSI+18 2697 1 LSPM J1309+1731 1RXS J130959.3+173136 AAVSO 1305+18
CSV 102722 LTT 13802 SAO 100443 Gaia EDR3 3937881211045638400
2EUVE J1310+17.5 2MASS J13095936+1731456 SKY# 24360
EUVE J1310+17.5 NAME Diadem TD1 16671

References (197 between 1850 and 2022) (Total 197)
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 : 25    V* : 1    ROT : 1    Fe_H : 9    PLX : 3    PM : 6    MK : 3   

   

Observing logs


herschel : 2   

   


External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : * alf Com

Link by name to the catalogue in VizieR :

CCDM J13100+1732AB AG+17 1350 AKARI-IRC-V1 J1309590+173147 BD+18 2697 EUVE J1310+17.5
GJ 501.0 HIC 64241 HIP 64241 IRAS 13075+1747 IRAS F13075+1747
LSPM J1309+1731 2MASS J13095936+1731456 NLTT 33105 NSV 6116 PLX 3006
PPM 129630 1RXS J130959.3+173136 SAO 100443 TD1 16671 USNO-B1.0 1075-00257793
uvby98 100114378 WDS J13100+1732AB WISEA J130958.98+173147.5 WISE J130958.97+173146.5 Gaia EDR3 3937881211045638400

Search by coordinates in Vizier (radius: 10 arcsec)


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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report an error concerning the data of this object




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2022.05.19-00:14:14

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