AU Microscopii

Query : AU Microscopii

Basic data :
HD 197481 -- BY Dra Variable
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,CD,...), PM* (2013MNRAS,Ci,...), X (2015A&A,1AXG,...), ** (**,CCDM,...), V* (ASAS,1SWASP,...), UV (2EUVE,EUVE,...), MIR (AKARI,WISEA,...), Er* (2020AJ,[GKL99]), LM* (2019AJ), BY* (2017ARep), NIR (2MASS), IR (IRAS)
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 45 09.5324974119 -31 20 27.237889841 (Optical) [ 0.0173 0.0113 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
FK5 coord. (ep=J2000 eq=2000) : 		20 45 09.5337685567 -31 20 27.216932540 [ 0.0173 0.0113 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
FK4 coord. (ep=B1950 eq=1950) : 		20 42 03.7916989382 -31 31 05.551562626 [ 0.0173 0.0113 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) : 		012.6546144900849 -36.8024952537245 [ 0.0173 0.0113 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 : 		281.319 -360.148 [0.022 0.019 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) -4.71 [0.0013] / z(spectroscopic) -0.000016 [0.000000] / cz -4.71 [0.00]
   (Opt) A 2018MNRAS.475.1960F
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): 		102.9432 [0.0231] 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: 		M1VeBa1 C 1989ApJS...71..245K
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) :
B 10.05 [~] E ~
V 8.627 [0.052] C 2012AcA....62...67K
R 9.078 [0.06] D 2012yCat.1322....0Z
G 7.843440 [0.002890] C 2020yCat.1350....0G
I 6.593 [0.029] C 2012AcA....62...67K
J 5.436 [0.017] C 2003yCat.2246....0C
H 4.831 [0.016] C 2003yCat.2246....0C
K 4.529 [~] D 2010PASP..122..885S
g 9.579 [0.05] D 2012yCat.1322....0Z
r 8.636 [0.09] D 2012yCat.1322....0Z
i 7.355 [0.14] E 2012yCat.1322....0Z
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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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
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

: 3 		: 514 Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (59) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

HD 197481 GCRV 12995 PM J20451-3120 UCAC4 294-224065
** LDS 720A GEN# +1.00197481 PPM 300560 UGP 505
AKARI-IRC-V1 J2045097-312029 GJ 803 RBS 1695 V* AU Mic
ASAS J204510-3120.4 HIC 102409 2RE J2045-312 WDS J20452-3120A
ASAS J204509-3120.3 HIP 102409 2RE J204510-312000 WEB 18541
1AXG J204508-3119 IDS 20390-3142 A RE J2045-312 WISEA J204509.75-312030.9
CCDM J20451-3122A IRAS 20420-3131 RE J204509-312004 WISE J204509.76-312030.9
CD-31 17815 IRAS F20420-3131 RX J2045.2-3120 Zkh 310
Ci 20 1225 Karmn J20451-313 1RXS J204509.4-312023 [FS2003] 1089
CPC 17 11323 LTT 8214 SAO 212402 [GKL99] 394
CPD-31 6335 2MASS J20450949-3120266 1SWASP J204509.52-312027.2 [L91b] 329
2E 4416 MCC 824 TIC 441420236 [RHG95] 3241
2E 2042.0-3131 NLTT 49807 TOI-2221 Gaia DR3 6794047652729201024
2EUVE J2045-31.3 PLX 4939 TYC 7457-641-1 Gaia DR2 6794047652729201024
EUVE J2045-31.3 PLX 4939.00 UBV 17963

References (311 between 2019 and 2024) (Total 1161)
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 :

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                 or select by : (not exhaustive, explanation here)

Collections of Measurements


velocities : 13    distance : 4    Fe_H : 9    V* : 5    diameter : 2    ROT : 8    PLX : 5    PM : 6    MK : 15   

   

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 (13) 

 |typ|    Value    R   m.e.  |A (Nmes)|na,Q,dom ,   res    D| Obs.date | Rem.  |Or|     Reference     |
 ------------------------------------------------------------------------------------------------------
 |v  |   -5.570       0.01   |A (   1)|s , ,Opt ,           |          |       |  |2021A&A...645A..30Z|

distance (4) 

 | distance Q unit|  err-        err+     | method |     reference     |
 -----------------------------------------------------------------------
 |    9.7140  pc  |  -0.0021     +0.0021  |paral   |2020yCat.1350....0G|

fe_h (9) 

 | Teff  log.g | Fe_H  c|CompStar |CatNo|     Reference     |
 ------------------------------------------------------------
 |  3835 4.72  | 0.194  |Sun      |     |2021ApJS..255....8R|

v* (5) 

 |     vartyp     |    Vmax     p     Vmin    |   period   | epoch (JD)   |D/rt %|     reference     |
 -----------------------------------------------------------------------------------------------------
 |ROT             |                           |   4.9000   |              |      |2021A&A...645A..30Z|

diameter (2) 

 |diameterQ unit| error  | filter | method |     reference     |
 ---------------------------------------------------------------
 |1.20E+06  km  |        |        |        |2007ApJ...660.1556R|

rot (8) 

 |  Vsini  [  err   ] (mes)|Q|     reference     |
 -------------------------------------------------
 |   9.60  [  1.65  ] (   )| |2023AJ....166....4H|

plx (5) 

 |    plx    :    m.e     R |     reference     |
 ------------------------------------------------
 | 102.9432  :   0.0231     |2020yCat.1350....0G|

pm (6) 

 |  pm-ra  [   m.e   ]|  pm-de  [   m.e   ]|syst|     reference     |
 --------------------------------------------------------------------
 | +281.319[    0.022]| -360.148[    0.019]|ICRS|2020yCat.1350....0G|

mk (15) 

 |ds/mss|           Spectral type            |     reference     |
 -----------------------------------------------------------------
m|  /   |M0.5V                               |2006AJ....132..866R|
Observing logs


ISO : 3    herschel : 6    IUE : 149    XMM : 1   

   

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 (3)

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     0.025  13501002  PHT03    3.08  117.55  AU MIC                          1996-03-31T05:34:07    814      5139  99" D               311.2896  -31.3405      JDOYLE   +    MASS_DME
    2     0.025  13501003  SWS01    2.38   45.20  AU MIC                          1996-03-31T05:48:25   6546      5140  33"x20"             311.2896  -31.3405      JDOYLE   +    MASS_DME
    3     0.395  13500440  PHT03    4.09  117.55  AU Mic                          1996-03-31T02:21:29   1478      5125  120" D              311.2850  -31.3357      TRAY     +    EVOLDISK

herschel (6)

The 1 column in color are computed by VizieR, and are not part of the original data.

Note: (see also the postcard server)

VI/139/herschel
Post annotation 		Herschel Observation Log (Herschel Science Centre, 2013) [ReadMe+ftp]
2013yCat.6139....0H

The Herschel Observation Log (37093 rows)		img(gal)
start AladinLite 
 Full      _r     OD   Target                                 RAJ2000      DEJ2000    Proposal           AOT                 Dur          Start            ObsId       PACS        HIFI        SPIRE    Label                                                                                                                 
        arcmin                                               "h:m:s"      "d:m:s"                                            s             s                                                                                                                                                                                 


    1   0.0008   903  AU Mic                               20 45 09.53  -31 20 27.2  KPGT_golofs01_1    HifiPoint            868  2011-11-02T23:01:09  1342231780              get Herschel/HIFI observation #1342231780               HPoint-0008  - resched                                                                                                
    2   0.0008   560  AU Mic                               20 45 09.53  -31 20 27.2  KPGT_golofs01_1    HifiPoint           3339  2010-11-25T08:24:56  1342210081              get Herschel/HIFI observation #1342210081               HPoint-0003                                                                                                           
    3   0.0008   361  Au Mic                               20 45 09.53  -31 20 27.2  KPGT_golofs01_1    PacsPhoto           5478  2010-05-09T23:05:46  1342196103  get Herschel/PACS observation #1342196103                           Au Mic PACS imaging Blue +Red scan135                                                                                 
    4   0.0008   360  Au Mic                               20 45 09.53  -31 20 27.2  KPGT_golofs01_1    PacsPhoto           5478  2010-05-09T17:11:45  1342196038  get Herschel/PACS observation #1342196038                           Au Mic PACS imaging Blue +Red scan45                                                                                  
    5   0.0008   326  AU Mic                               20 45 09.53  -31 20 27.2  KPGT_golofs01_1    SpirePhoto          2906  2010-04-05T01:31:54  1342193786                          get Herschel/SPIRE observation #1342193786   SPhoto-0006 - 0001                                                                                                    
    6   0.0008   323  AU Mic                               20 45 09.53  -31 20 27.2  KPGT_golofs01_1    PacsLineSpec        2485  2010-04-01T22:18:01  1342193195  get Herschel/PACS observation #1342193195                           AU Mic PACS 63um - AU Mic

iue (149) 

 |Homogenized Name:  ComplID   |PROG |CL|D CAM IMAGE A| FES  MD|Obs.da  Time |ExpTim|m|CEB|S|      Comments      |F|     reference     |
 ---------------------------------------------------------------------------------------------------------------------------------------
 |HD 197481       :            |UK353|52|L SWP 09712 L| 1180 FO|800806 230300|009900| |231|V|STAR MOVED EVERY 30 |*|1996IUEML.C......0I|

xmm (1)

The 3 columns in color are computed by VizieR, and are not part of the original data.
B/xmm/xmmlog
Post annotation 		XMM-Newton Observation Log (XMM-Newton Science Operation Center, 2012) [ReadMe+ftp]
2002yCat....102009X

The XMM-Newton Observation log (2024-03-25)[image/fits] (17645 rows)		img(gal)
start AladinLite 
 Full      _r        Obsno     PropDate   Object                           RAJ2000    DEJ2000           Obs0          ObsDur Image  PPSp   FITS XSAlink
        arcmin                    s                                         deg        deg              s              s                             


    1    0.0017  0111420101  2002-09-01  AU Microscopii                  311.28975  -31.34089  2000-10-13T15:17:52    56109 FITS       PPSp  0111420101 Y

External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : AU Microscopii

Link by name to the catalogue in VizieR :

HD 197481 AKARI-IRC-V1 J2045097-312029 CCDM J20451-3122A CD-31 17815 CPD-31 6335
2E 4416 EUVE J2045-31.3 GJ 803 HIC 102409 HIP 102409
IRAS 20420-3131 IRAS F20420-3131 2MASS J20450949-3120266 NLTT 49807 PLX 4939
PPM 300560 2RE J2045-312 2RE J204510-312000 1RXS J204509.4-312023 SAO 212402
TYC 7457-641-1 UCAC4 294-224065 V* AU Mic WDS J20452-3120A WISEA J204509.75-312030.9
WISE J204509.76-312030.9 [GKL99] 394 [L91b] 329 Gaia DR3 6794047652729201024 Gaia DR2 6794047652729201024

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 .

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