HD 37021

Query : HD 37021 C.D.S. - SIMBAD4 rel 1.225 - 2015.09.03CEST06:29:57

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


Basic data :
* tet01 Ori B -- Eclipsing binary of Algol type (detached)
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:
Al* (), * (*,ALS,CSI,GCRV,GEN#,HD​,HGAM,HR,ROT,SKY#​,TCC,TYC,UBV,UCAC4​,USNO,uvby98,WH,[S58]), ** (**,ADS,WDS,[S78b]), IR (2MASS,[HAB84],[HHM94]), *iC (Brun,[SCB99]), Rad (GMR,[ZRK2004]), SB* (SBC7), *iN (Parenago), V* (V*), UV (EUVE), X ([SCH2001])
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) :
05 35 16.112 -05 23 06.89 ( Optical ) [ 113 81 90 ] B 2000A&A...355L..27H
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) :
05 35 16.112 -05 23 06.89 [ 113 81 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) :
05 32 48.65 -05 25 00.2 [ 154 104 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
Gal coord. (ep=J2000) :
209.0058 -19.3833 [ 113 81 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 :
-0.9 0.1 [2.1 1.3 90] B 2000A&A...355L..27H
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) 26 [1] / z(~) 0.000087 [0.000003] / cz 26.00 [1.00]   (~) B 2013AJ....146..106O
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:
B1V C 1998AJ....115..821M
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 (5) :
U 7.71 [~] C 2002yCat.2237....0D
B 8.20 [~] C 2002yCat.2237....0D
V 7.96 [~] C 2002yCat.2237....0D
H 6.30 [0.03] C 2003yCat.2246....0C
K 6.004 [0.017] C 2003yCat.2246....0C
SIMBAD with radius arcmin
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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.
essential notes:
  • tet01 ORI B East = COUP 778 and tet01 ORI B West = COUP 766. 2005ApJS..160..557S
  • Spatially resolved into 4 stars B1 to B4; B1 is the actual SB*, sometimes described as B1+B5 in the literature (e.g.2003ApJ...599..537C). Component B5 is not in Simbad (not spatially resolved).


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

: 1
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.

: 4
: 51 Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (38) :

V* BM Ori GEN# +9.00010595 TCC 56 [HHM94] 5
* 41 Ori B GMR 15 TYC 4774-954-1 [OW94] 161-307W
* tet01 Ori B HD 37021 UBV 21614 [S58] 99
** STF 748B HGAM 437 UBV M 51675 [S78b] 75B
ADS 4186 B HR 1894 UCAC4 424-010232 [SCB99] 110
ALS 14652 2MASS J05351611-0523068 USNO-B1.0 0846-00061569 [SCH2001] 2
Brun 595 Parenago 1863 uvby98 900010595 V [ZRK2004] 49
CSI-05 1315 2 ROT 876 WDS J05353-0523B [ZRK2004] 161-307
EUVE J0535-05.3 SBC7 240 WH 278
GCRV 3411 SKY# 9020 [HAB84] 84

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References (277 between 1850 and 2015)
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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                                  Sort reference summaries by : (not exhaustive, explanation here)

                                 


Measurements (10 types) :


Hbet1 : 3    IUE : 103    JP11 : 1    MK : 2    oRV : 6    ROT : 3    UBV : 2    uvby1 : 3    V* : 2    velocities : 6   

   


External archives :

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

Catalogue information from VizieR :

Generic search by coordinates (radius: 5 arcsec)

V* BM Ori ALS 14652 EUVE J0535-05.3 HD 37021 HR 1894
2MASS J05351611-0523068 TYC 4774-954-1 USNO-B1.0 0846-00061569 WDS J05353-0523B

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

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2015.09.03-06:29:57

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