HD 42834

Query : HD 42834

Basic data :
HD 42834 -- 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: 		* (HD,CD,...), UV (TD1), 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) : 		06 10 39.9278644968 -45 16 55.159860828 (Optical) [ 0.0351 0.0453 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
FK4 coord. (ep=B1950 eq=1950) : 		06 09 13.6066894699 -45 16 12.113619159 [ 0.0351 0.0453 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) : 		252.6658681347419 -25.7745189442510 [ 0.0351 0.0453 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 : 		-1.126 7.178 [0.046 0.058 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) 20.00 [3.7] / z(~) 0.000067 [0.000012] / cz 20.00 [3.70]
   C 2007AN....328..889K
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): 		4.8111 [0.0426] 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: 		A0V C 1978MSS...C02....0H
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 (6) :
B 6.262 [0.014] D 2000A&A...355L..27H
V 6.272 [0.010] D 2000A&A...355L..27H
G 6.274934 [0.002785] C 2020yCat.1350....0G
J 6.255 [0.023] C 2003yCat.2246....0C
H 6.305 [0.049] C 2003yCat.2246....0C
K 6.217 [0.020] C 2003yCat.2246....0C
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 (26) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

HD 42834 GEN# +1.00042834 PPM 310471 UBV M 11875
CD-45 2349 GSC 08101-01756 SAO 217758 uvby98 100042834
CPC 0 3374 HIC 29304 SKY# 10377 WEB 5753
CPD-45 775 HIP 29304 TD1 6378 Gaia DR2 5567004775055961728
FK5 2472 HR 2211 TIC 231916349 Gaia DR3 5567004775055961728
GC 7893 2MASS J06103994-4516551 TYC 8101-1756-1
GCRV 57202 N30 1329 UBV 6257

References (32 between 1850 and 2024) (Total 32)
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 : 5    distance : 2    ROT : 2    Fe_H : 2    PLX : 4    PM : 6    MK : 2   

   

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 (5) 

 |typ|    Value    R   m.e.  |A (Nmes)|na,Q,dom ,   res    D| Obs.date | Rem.  |Or|     Reference     |
 ------------------------------------------------------------------------------------------------------
 |v  |   20.0                |  (   5)|s , ,    ,           |          |       |  |1995A&AS..114..269D|
 |V  |   20.00        3.70   |C (    )|s , ,O   ,           |          |       |  |2007AN....328..889K|
 |v  |   33.0                |  (    )|  , ,    ,           |          |       |  |2000VeARI..37....1W|
 |v  |   20                  |C (   5)|  , ,    ,           |          |##     |  |1979IAUS...30...57E|
 |v  |   17.2                |  (   4)|  , ,    ,           |          |       |  |1970MmRAS..72..233H|

distance (2) 

 | distance Q unit|  err-        err+     | method |     reference     |
 -----------------------------------------------------------------------
 |  207.853   pc  |  -1.8404     +1.8404  |paral   |2020yCat.1350....0G|
 |  216.2957  pc  |  -2.6105     +2.6105  |paral   |2018yCat.1345....0G|

rot (2) 

 |  Vsini  [  err   ] (mes)|Q|     reference     |
 -------------------------------------------------
 | 176     [        ] (  0)|D|2007A&A...463..671R|
 | 176     [        ] (   )|D|2002A&A...393..897R|

fe_h (2) 

 | Teff  log.g | Fe_H  c|CompStar |CatNo|     Reference     |
 ------------------------------------------------------------
 |  9750       |        |         |     |2012A&A...537A.120Z|
 | 10114       |        |         |     |2006A&A...458..293P|

plx (4) 

 |    plx    :    m.e     R |     reference     |
 ------------------------------------------------
 |   4.8111  :   0.0426     |2020yCat.1350....0G|
 |   4.6233  :   0.0558     |2018yCat.1345....0G|
 |   4.92    :   0.50       |1997A&A...323L..49P|
 |   4.31    :   0.26       |2007A&A...474..653V|

pm (6) 

 |  pm-ra  [   m.e   ]|  pm-de  [   m.e   ]|syst|     reference     |
 --------------------------------------------------------------------
 |   -1.126[    0.046]|   +7.178[    0.058]|ICRS|2020yCat.1350....0G|
 |   -1.934[    0.106]|   +7.541[    0.115]|ICRS|2018yCat.1345....0G|
 |   -1.08 [    0.24 ]|   +7.72 [    0.26 ]|ICRS|2007A&A...474..653V|
 |   -1.09 [    0.50 ]|   +7.78 [    0.49 ]|ICRS|1997A&A...323L..49P|
 |   +0    [         ]|   -9    [         ]|FK4 |1952N30...C......0M|
 |  -11    [         ]|   -1    [         ]|FK4 |1933GCCat.C......0B|

mk (2) 

 |ds/mss|           Spectral type            |     reference     |
 -----------------------------------------------------------------
 |  /   |B9                                  |1993yCat.3135....0C|
 |  /   |A0V                                 |1978MSS...C02....0H|

External archives :

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

Link by name to the catalogue in VizieR :

HD 42834 CD-45 2349 CPD-45 775 FK5 2472 GSC 08101-01756
HIC 29304 HIP 29304 HR 2211 2MASS J06103994-4516551 PPM 310471
SAO 217758 TD1 6378 TYC 8101-1756-1 uvby98 100042834 Gaia DR2 5567004775055961728
Gaia DR3 5567004775055961728

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