U Orionis

Query : U Orionis

Basic data :
V* U Ori -- Mira 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,AG,...), V* (ASAS,ASASSN,...), Mi* (2012A&A), Mas ([LBR81],[PCC93],...), IR (IRAS,IRC,...), LP* (2020ApJS), MIR (AKARI,WISEA), No* (NOVA), Em* ([KW97]), 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) : 		05 55 49.1707632432 +20 10 30.677904084 (Optical) [ 0.1710 0.1376 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) : 		05 55 49.1725216756 +20 10 30.658173376 [ 0.1710 0.1376 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) : 		05 52 50.9402288377 +20 10 06.208316830 [ 0.1710 0.1376 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) : 		188.7151643578914 -02.4921142960233 [ 0.1710 0.1376 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 : 		-12.355 -6.479 [0.192 0.134 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) -19.50 [0.7] / z(~) -0.000065 [0.000002] / cz -19.50 [0.70]
   A 2006AstL...32..759G
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): 		3.4924 [0.1820] 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: 		M6-9.5e B 1974ApJS...28..271K
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 (8) :
U 6.82 [~] C 2002yCat.2237....0D
B 6.39 [~] C 2002yCat.2237....0D
V 5.40 [~] C 2002yCat.2237....0D
R 6.24 [~] E 2020ApJS..247...44A
G 6.629713 [0.077925] C 2022yCat.1355....0G
J 0.61 [~] C 2002yCat.2237....0D
H -0.28 [~] C 2002yCat.2237....0D
K -0.70 [~] C 2002yCat.2237....0D
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

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (38) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

HD 39816 GCRV 3683 NOVA Ori 1885 WISEA J055549.12+201030.5
AG+20 595 GEN# +1.00039816 PPM 95093 [KW97] 25-58
AKARI-IRC-V1 J0555491+201030 GSC 01320-00526 RAFGL 837 [LBR81] B055250.91+201006.2
ASAS J055549+2010.5 HIC 28041 SAO 77730 [PCC93] 87
ASASSN-V J055549.21+201030.3 HIP 28041 SKY# 9823 [TVH89] 15
BD+20 11711 HR 2063 TIC 119041739 AAVSO 0549+20A
BD+20 1171a IRAS 05528+2010 TYC 1320-526-1 Gaia DR3 3399013173616323200
CSI+20 1171 1 IRC +20127 UCAC3 221-42759 Gaia DR2 3399013173615356160
DO 11719 2MASS J05554916+2010306 V* U Ori
GC 7457 NAME Gore's Nova WEB 5491

References (18 between 2019 and 2024) (Total 488)
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 : 7    V* : 7    distance : 2    PLX : 5    PM : 6    MK : 9   

   

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 (7) 

 |typ|    Value    R   m.e.  |A (Nmes)|na,Q,dom ,   res    D| Obs.date | Rem.  |Or|     Reference     |
 ------------------------------------------------------------------------------------------------------
 |v  |  -20.8                |  (  15)|s , ,    ,           |          |       |  |1995A&AS..114..269D|

v* (7) 

 |     vartyp     |    Vmax     p     Vmin    |   period   | epoch (JD)   |D/rt %|     reference     |
 -----------------------------------------------------------------------------------------------------
m|LPV             |             G             | 373.955986 |              |      |2022yCat.1358....0G|

distance (2) 

 | distance Q unit|  err-        err+     | method |     reference     |
 -----------------------------------------------------------------------
 |  286.336   pc  | -14.9219    +14.9219  |paral   |2020yCat.1350....0G|

plx (5) 

 |    plx    :    m.e     R |     reference     |
 ------------------------------------------------
 |   3.4924  :   0.1820     |2020yCat.1350....0G|

pm (6) 

 |  pm-ra  [   m.e   ]|  pm-de  [   m.e   ]|syst|     reference     |
 --------------------------------------------------------------------
 |  -12.355[    0.192]|   -6.479[    0.134]|ICRS|2020yCat.1350....0G|

mk (9) 

 |ds/mss|           Spectral type            |     reference     |
 -----------------------------------------------------------------
 |  /   |Md                                  |1993yCat.3135....0C|
Observing logs


ISO : 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 (1)

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     0.019  84902009  SWS06    2.95   16.50  U ORI                           1998-03-13T23:45:14   1312     35345  27"x14"             088.9550  +20.1749      TDEJONG  +    AGBSTAR2

External archives :

Data at NED - NASA/IPAC Extragalactic Database : U Orionis

Link by name to the catalogue in VizieR :

HD 39816 AG+20 595 AKARI-IRC-V1 J0555491+201030 BD+20 11711 BD+20 1171a
DO 11719 GSC 01320-00526 HIC 28041 HIP 28041 HR 2063
IRAS 05528+2010 IRC +20127 2MASS J05554916+2010306 PPM 95093 RAFGL 837
SAO 77730 TYC 1320-526-1 UCAC3 221-42759 V* U Ori WISEA J055549.12+201030.5
Gaia DR3 3399013173616323200 Gaia DR2 3399013173615356160

Search by coordinates in Vizier (radius: 5 arcsec)

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